197results about How to "Good denitrification and phosphorus removal" patented technology

The invention discloses an aerobic-anoxic-anaerobic integrated module type fast denitrogenation reactor for sewage and a treatment method thereof and relates to an integrated sewage treatment device, which is particularly suitable for fast integrated treatment for sewage by denitrogenation technology. The device is designed for solving the problems of complex process, high treatment expense, additional carbon source and regulation of outflow pH, difficult zero discharge and the like existing in aerobic-anoxic-anaerobic denitrogenation sewage treatment. Aerobic-anoxic-anaerobic processes are technically integrated to enable sewage to be always in an alternate aerobic-anoxic-anaerobic environment; an organic carbon source, organic nitrogen and total phosphorus are distributed reasonably to avoid shortage of carbon source during denitrogenation, so that total nitrogen and total phosphorus are converted effectively, the effect of denitrogenation and dephosphorization are improved, and discharged water reaches first discharge standard of Integrated Wstewater Discharge Standard (GB8978-1996). The device is used for treating municipal domestic sewage, especially sewage of middle and small stations along railway lines.

The invention relates to a sewage double-biomembrane deep treatment technology comprising the steps: sewage enters an anaerobic tank, an anoxic tank and an oxygen maintaining tank after being pretreated by a grid and settled sand, and mud releases phosphorus in the anaerobic tank; the sewage is denitrified in a denitrification mode in the anoxic tank so as to remove most of organic matters; cilium biological fillers are arranged in the oxygen maintaining tank, biomembranes are attached to the cilium, absorb the phosphorus in excess and degrade the partial organic matters; the sewage enters a secondary sedimentation tank to carry out sedimentation treatment through the oxygen maintaining tank and then enters an aeration biological filter tank; granule biological fillers are arranged in the aeration biological filter tank, and the biomembranes are attached to granules, degrade the residual organic matters in the sewage and convert ammonia nitrogen into nitrate nitrogen; one part of the discharged water of the aeration biological filter tank flows back into the anoxic tank, and the other part is discharged; one part of the mud generated by the secondary sedimentation tank back flows into the anoxic tank, and the other part of the mud is discharged out of a system. The sewage double-biomembrane deep treatment technology has the advantages of investment saving, low operation cost, little land occupation and good treatment effect.

The invention provides an AALOO multipoint water feeding synchronization denitrification and dephosphorization process. All pretreated wastewater Q1 enters an anaerobic tank, then flows through an anoxic tank, a low oxygen tank, a short-term aerobic tank and a precipitation tank sequentially, and then is discharged from the precipitation tank. Partial pretreated wastewater Q2 directly enters the low oxygen reaction tank, then flows through the short-term aerobic tank and the precipitation tank sequentially, and then is discharged from the precipitation tank. One part of precipitated sludge flows back to the anaerobic tank, and the other part of the precipitated sludge is discharged from the precipitation tank as excess sludge. Mixed liquid return channels are arranged between the low oxygen reaction tank and the anoxic tank, and the mixed liquid return channels are also arranged between the short-term aerobic tank and the low oxygen reaction tank. A returned sludge contact reaction region is arranged on the front end of the anaerobic tank, and water feeding points are arranged both on the front end region and the rear end region of the anaerobic tank. The method has a simple flow, and is adaptable to wastewater quality change, and is capable of removing nitrogen and phosphorus from wastewater with low carbon source and low oxygen consumption. The method is applicable to rebuilding or building of a municipal wastewater treatment plant which has nitrogen and phosphorus removing requirements.

The invention discloses a method for producing short-chain volatile fatty acids by utilizing kitchen wastes and the short-chain volatile fatty acids. The method specifically comprises the following steps: uniformly mixing and stirring the kitchen wastes serving as a fermentation substrate and sludge serving as an inoculum, thereby obtaining a fermentation matrix; and adding alkyl polyglucosides into the fermentation matrix, and performing anaerobic fermentation under a stirring condition. The reduction, recycling and innocent treatment of the kitchen wastes are realized, and the method has the advantages of low operating cost, high profit, high yield of the short-chain volatile fatty acids and the like.

The invention discloses a treatment method for a preposed municipal sewage denitrification biological filter, relates to a water treatment method, and solves the problems that the prior water treatment method has long process, poor treatment effect, large occupied area and high sewage treatment cost. The method comprises the following steps: firstly, pretreatment of municipal sewage; secondly, feeding outlet water after pretreatment and nitrified backflow liquid into a denitrification filter pool together to carry out denitrification treatment; thirdly, back feeding iron trichloride solution to carry out chemical phosphorus removal; fourthly, feeding the outlet water after denitrification into an aeration biological filter to carry out nitration treatment; and fifthly, sterilizing by ultraviolet, namely, realizing the treatment of the sewage. The method has simple process, shortens process flow, and has little occupied area, good water treatment effect and stable outlet water quality under the conditions of lower energy consumption and capital expenditure; and the water quality reaches the requirement of grade A standard of Municipal Wastewater Treatment Plant Discharge Standard prescribed by China.

The invention provides a dye waste water treatment method, comprising a materializing pre-treatment, an anaerobic treatment, an aerobic treatment, and an advanced oxidation treatment carried out in sequence, wherein the method comprises the steps of conducting a materializing pre-treatment to the object dye waste water to get rid of a part of chromaticity and COD for the anaerobic treatment and aerobic treatment, and then conducting an advanced oxidation treatment to the water discharged from the aerobic treatment to finally remove the degradation-refractory pollutant at the end of the waste water treatment and the intermediate metabolized substances produced in the process of biological treatment. Through the combined process of materializing pre-treatment, anaerobic treatment, aerobic treatment and advanced oxidation treatment, the invention can effectively treat difficultly degraded dye waste water and reduce the operation cost, thereby being capable of standardizing the indexes such as COD and chromaticity of the discharged water to the national norm simultaneously, solving the domestic current situation of difficulties in treating dye waste water, and being capable of meetingthe requirements of upgrading and restructuring the sewage treatment plant according to the increased standard of environment protection in the future.

The present invention discloses a counter flow type vertical flow artificial wetland system, which comprises a downward flow artificial wetland unit and an upward flow artificial wetland unit, wherein the downward flow artificial wetland unit and the upward flow artificial wetland unit are respectively provided with a composite filler bed, the top of the downward flow artificial wetland unit is provided with a water inlet pipe and a water distribution region, the top of the upward flow artificial wetland unit is provided with a water collection region and a water outlet pipe, the bottoms of the downward flow artificial wetland unit and the upward flow artificial wetland unit are connected through a connection pipe, fillers in the composite filler bed of the downward flow artificial wetland unit are sequentially gravel, zeolite and cobbles from top to bottom, and fillers in the composite filler bed of the upward flow artificial wetland unit are sequentially cobbles added with rice husk, steel slag and limestone from bottom to top. With the counter flow type vertical flow artificial wetland system, a deep treatment can be performed on the existing secondary wastewater treatment plant; a structure is simple; management is convenient; clogging is not easily generated; operation cost is low; a nitrogen and phosphorus removal effect is good; artificial wetland sewage treatment effect enhancement can be achieved; and water quality of secondary effluent of the city sewage treatment plant can be improved.

The invention belongs to the technical field of environmental protection and particularly relates to an energy-saving and emission-reducing town sewage treatment system. The energy-saving and emission-reducing town sewage treatment system provided by the invention comprises a strengthened pre-treatment system, a self-suction jet biological aerated filter system, a composite fluidized-bed biomembrane reaction tank system, a sludge treatment and refluxing system and a winter heat insulation system and is realized by a sewage lifting technology or sewage self-flowing process. According to the system, a novel anaerobic sewage treatment technology, an activated sludge process and a novel aerobic biomembrane-process treatment technology are organically combined, so that the advantages of small floor area, small investment, low energy consumption and simplicity and convenience in maintenance management are achieved; the sewage treatment system disclosed by the invention can be applied to town sewage treatment, and treated outlet water can stably reach the standard A of first-level standard of discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002).

The invention discloses a kitchen wastewater treatment method which comprises the following steps: 1, chemical phosphorus removal is performed on kitchen wastewater flowing out from an IC (internal circulation) reactor; 2, after passing through a water quality equalization tank, the wastewater enters a CASS (Cyclic Activated Sludge System) to react, so that soluble substrates, organisms, phosphorus and an synchronous nitrification and denitrification effect are removed; 3, after the wastewater flows into an intermediate water tank to be subjected to volume regulation, the wastewater enters a Fenton oxidation reactor and an iron-carbon micro-electrolysis device so as to improve biodegradability of the wastewater; 4, after passing through the Fenton oxidation reactor and the iron-carbon micro-electrolysis device, the wastewater directly enters a hydrolysis acidification pool from the intermediate water tank, suspended matter and iron ions are removed and sludge is separated, hydrolyzed and acidified; 5, the wastewater is subjected to aerated oxidation to remove COD (Chemical Oxygen Demand) content; 6, the wastewater enters an MBR (Meane Biological Reactor) pool and hardly degradable substances are degraded, so that the drained wastewater reaches the take-over standard of a sewage treatment plant; 7, after the sludge discharged from a chemical phosphorus removal pool and the MBR pool is processed by a precision solid-liquid separator, solids are prepared into an organic fertilizer and filter-pressing liquid enters the water quality equalization tank.

The invention discloses a wavy subsurface flow constructed wetland with a multi-medium layer. The wavy subsurface flow constructed wetland comprises a packing layer, more than two baffle plates, a soil layer and plants, and the baffle plates are arranged in the packing layer in a staggered manner, so that water flow forms vertically fluctuated subsurface flow when flowing through the packing layer. Packing of the packing layer comprises gravel and a composite packing bag, and packing of the composite packing bag comprises soil, wood shavings, charcoal and scrap iron. By layered filling of the composite packing, the water flow regime of the wetland is changed by the baffle plates to form the vertically fluctuated subsurface flow, nitrogen and phosphorus removal effects of the wetland can be enhanced, and the wetland has a good application prospect.

The invention provides an urban sewage treatment process applicable to a quasi-IV class water standard. The invention relates to the field of urban sewage treatment, and discloses the sewage treatmentprocess which meets requirements of quasi-IV class water. The sewage treatment process comprises the following steps: urban sewage is treated through primary treatment (mainly through processing units such as coarse and fine grids, a grit chamber, a regulating tank and the like) so that garbage of relatively large particle size, floating matter, suspended solid, sandstone and the like in the sewage can be removed; effluent after the primary treatment enters a multi-stage AO composite IFAS biochemical system to remove most of the organic matter, total nitrogen, total phosphorus and other pollutants; the effluent from IFAS enters a A2O tank, and the effluent from the A2O tank enters a secondary settling tank for solid-liquid separation; supernatant liquid discharged from the secondary settling tank enters a high-speed settling tank, and a phosphorus removal agent and a coagulant are added for reaction and precipitation; the effluent from the high-speed settling tank enters a high-precision filter cloth filter tank, and the sewage is filtered to remove SS; and the effluent enters a disinfection tank for disinfection treatment and is discharged after reaching the quasi-IV class waterstandard.

The invention relates to a zanjon air lifting pushing solid circulation inversion A<2>O integrated construction oxidation ditch, which comprises an anoxic zone, an anaerobic zone, an aerobic zone provided with a millipore aerator group and an inversion A<2>O integrated construction oxidation ditch of a solid and liquid separating zone. The solid and liquid separating zone is arranged at the front end of a main ditch, the anaerobic zone is arranged at the tail end of the main ditch, and water inlets are respectively arranged at the front ends of the aerobic zone and the anaerobic zone. The integrated construction oxidation ditch is characterized in that a horizontal partition board which divides the main ditch into an upper groove layer and a lower groove layer is arranged at the middle-lower part of the main ditch, the aerobic zone and the anaerobic zone are respectively arranged at the upper groove layer and the lower groove layer, the aerobic zone is internally provided with n (n is more than or equal to 1) aeration lifting zone (s) which is (are) composed of an inlet water-retaining wall, an outlet water-retaining wall and the millipore aerator group and is (are) provided with a lower water inlet and an upper water outlet, the horizontal partition board of a first grade aeration lifting zone is provided with a plurality of lifting holes, and the aerobic zone is internally divided into n aerobic reaction zone (s) corresponding to the aeration lifting zone (s).The integrated construction oxidation ditch has the advantages that: the yielding water quality, particularly the dephosphorization and denitrification effect, is better, the occupation area is reduced, the equipment is reduced, the operation is simplified, and the operation cost is lowered.

The invention relates to an industrial park heavy metal wastewater advanced treatment device which comprises a physical filter system (1), a multifunctional coagulative precipitation system (2), a combined biochemical system (3) and an MBR (membrane bioreactor) membrane system (4) which are sequentially connected, wherein the physical filter system is a 2mm fine grid, and is used for removing smaller floating materials and solid matters with the diameter of greater than 2mm in sewage, thereby ensuring the effect of the subsequent biological treatment system and the stable operation of maintenance equipment. The combined biochemical tank is composed of a hydrolysis+A2O tank, the MBR membrane system and a matched sludge concentration tank. The water treatment technique is carried out by sequentially using the units above. The physical filter system is a 2mm fine grid, and a stirrer is respectively arranged in an anaerobic section and an anoxic section. The anaerobic region, anoxic region and aerobic region are strictly separated, thereby being beneficial to the reproduction and growth of different microbial florae, and having favorable denitrification and dephosphorization effects.

The invention discloses a CDI (Capacitive Deionization) based compound type constructed wetland desalination system. The technical scheme of the invention is that a pretreatment system in the compounded type constructed wetland desalination system is connected with a compound vertical flow constructed wetland system by virtue of a pipeline. The pretreatment system is that: the water inlet and the water outlet of a grille (22) are communicated with the water inlet of a corresponding first pressure pump (23) and the water inlet of a CDI device (3) by virtue of pipelines, andthe water outlet of the CDI device (3) is communicated with the water inlet of a compound vertical flow constructed wetland and the water inlet of a salt drying plate (9) respectively through pipelines.A bottom impervious layer (18) of the compound vertical flow constructed wetland system is sequentially provided with a gravel layer (17), a biological ceramisite layer (13), a zeolite layer (12) and a soil layer (11) upwards, the constructedwetland is uniformly separated into 2n+1 vertical flow treatment tanks (7)along the left and right direction, and the tops and the bottoms of the vertical flow treatment tanksare communicated with one another in a staggered manner. The CDI based compound type constructed wetland desalination system disclosed by the invention is environmentallyfriendly, can effectively solve the problem of clogging and saturation of the soil layer of the wetland, and is good in nitrogen and phosphorus removal effect and desalination effect.

The invention relates to a method for reinforcing nitrogen and phosphorous removal from sewage by utilizing anaerobic environment of a pipeline. The method comprises the following specific steps: the municipal sewage enters into an anaerobic tank, an anoxic tank and a first aerobic tank in sequence from a first sewage inflow point, part of the nitration solution at the tail end of the first aerobic tank flows back to the initial end of the anoxic tank, the sludge mixed solution and the sewage entering from a second sewage inflow point are mixed, enter into a sewage pipeline and then enter into a second aerobic tank to complete organic matter degradation and nitration process, and at the same time, the nitration solution flows back to the initial end of a sludge pipeline and enters into a secondary sedimentation tank to undergo sludge and water separation, part of the sludge flows back to the initial end of the anaerobic tank and the residual sludge is discharged, wherein the DO (dissolved oxygen) in the anaerobic tank is controlled below 0.1mg / L; the DO in the anoxic tank is controlled below 0.5mg / L; and the DO in the first aerobic tank and the second aerobic tank is 1.0-2.0mg / L. The process has the beneficial effects of ensuring reasonable hydraulic retention time and proper backflow ratio by controlling two-point inflow, two stages (anaerobic stage and aerobic stage), two-stage nitration solution backflow and the like and achieving the aim of reinforcing the effect of nitrogen and phosphorous removal from sewage aiming at the municipal sewage with low carbon-nitrogen ratio.

The invention discloses an Anabaena flos-aquae embedding immobilization method which comprises the following steps: (1) pretreating Anabaena flos-aquae; (2) performing adsorption immobilization; (3) performing embedding immobilization; and (4) stabilizing. The embedding method disclosed by the patent of the invention is adapted to the physiological characteristics of Anabaena flos-aquae, so that the favorable physiological activity of Anabaena flos-aquae can be kept; the optimal embedding ratio provided by the invention ensures that the size, expandability, hydrophilicity, mass transfer efficiency and nitrogen and phosphorus removal efficiency of granules can be kept at satisfactory levels; and the embedding granules have favorable nitrogen and phosphorus removal effect.

The invention discloses an anti-clogging economic crop type filter bed-baffle subsurface flow constructed wetland enhanced nitrogen and phosphorus removal system which comprises a plant filter bed and a baffle subsurface flow constructed wetland as two main systems; the device intercepts a large amount of organic matters and suspended solids through plant roots in the filter bed, and plant residues are taken out from a water body when in harvest to prevent wetland clogging caused when sewage flows through the subsurface flow constructed wetland; meanwhile, the baffle subsurface flow constructed wetland extends the hydraulic retention time when the sewage flows through the wetland; the environment around the plant roots continuously shows aerobic, anoxic and anaerobic states, equivalent to a plurality of A2 / O units connected in parallel or series; the nitrogen removal effect is significant; the phosphorus adsorbing effects of a ceramic substrate and a gravel substrate are also significant. In addition, the difference of plants in the nitrogen and phosphorus absorption effect is also comprehensively considered in the grading planting of vegetable type and food crop type plants to make up the deficiency that single plant absorbs nutrient salt; the entire ecosystem achieves the dual combination of environmental benefits and economic benefits of a constructed wetland.

A method for employing anaerobic-aerobic combined biological filter to process domestic sewage relates to a method for processing domestic sewage. The invention solves the problems of poorer effects for removing P and N, poor effluent quality, and being hard to achieve the regulated discharge standard of the existing domestic sewage processing technique. The detail steps of the invention are as follows: the domestic sewage enters a pre-processing system, a biological flocculating constituent filter sedimentation tank, a BIOFOR anaerobic biological filter, a BIOFOR aeration biological filter, and an ultraviolet disinfecting device in sequence and then is discharged. The BIOFOR anaerobic biological filter is mainly used for denitrifying denitrification under the anaerobic conditions; the BIOFOR aeration biological filter is mainly used for removing the ammonia nitrogen and rest COD in the water and accomplishing the chemical P removing in the BIOFOR aeration biological filter. The invention employs the combination of the BIOFOR anaerobic biological filter and the BIOFOR aeration biological filter to process the domestic sewage; the P and N removing effects are good and the rest mud amount is less. Various indexes of the processed water body all can achieve the regulated standard and can completely realize automatization control.

The invention discloses a controllable subsurface artificial wetland sewage treatment system with inflowing at the two ends periodically and alternately and a treatment technology thereof. The system comprises a wetland inlet water distribution area, a wetland body part and a wetland outlet water collection area, wherein the water distribution area and the water collection area are positioned at the two ends of the whole system and form a symmetrical structure; the wetland body part is positioned between the wetland inlet water distribution area and the wetland outlet water collection area. Water inlet pipes are embedded in the upper parts of the walls on the side surfaces of the wetland inlet water distribution area and the wetland outlet water collection area, and more than two lines of water out pipes which are parallel with one another are embedded in the walls below the water inlet pipes. The wetland body part comprises a wetland matrix padding positioned at the bottom of the body part and economic plants planted on the wetland matrix padding. The sewage treatment system improves the growth conditions with obvious difference caused by uneven concentrations of nutrients of the plants at the front end and the rear end of a wetland in the traditional wetland system by periodically changing wetland water inlet points, and obtains good economic benefit while realizing the recycling of nitrogen and phosphorus in sewage.

The invention discloses a boat type sewage treatment system based on a sequencing batch reactor (SBR) process. The boat type sewage treatment system consists of four subsystems including a movement subsystem (a boat body and a contraction wheel), a sewage treatment subsystem (an SBR water treatment device, an anaerobic pool, a water inlet pump, a reflux pump, a sludge discharge pump and an aeration pump), a motive power subsystem (an electric cabinet and a generator) and a control subsystem (a programmable logic controller (PLC) control box, a water inlet valve, a reflux valve and a water discharge valve). When water bodies are locally polluted, the sewage treatment system can be conveniently moved to the pollution region, and sewage can be fast and effectively treated. The method has the advantages that the local and paroxysmal pollution of the water bodies can be eliminated, the water quality of the water bodies is improved, and important practical significances and wide application prospects are realized for maintaining the long-period stability of the water quality of the water bodies.

The invention discloses a treatment method and system of animal husbandry breeding wastewater. Suspended matters and fine fiber in waste liquid are removed at a solid-liquid separation pretreatment stage by mainly using an efficient mud-water separation device, so that convenience is brought to treatment of a subsequent biochemical reaction aftertreatment stage, and two-stage anaerobic-aerobic (AO) and biological aerated filter are adopted as core treatment processes at the biochemical reaction aftertreatment stage. Through the above treatment process, nitrogen and phosphor removal effect is obvious, and the system is high in impact load resistance, stable in running, low in running cost and convenient in equipment maintenance and can be widely applied in the field of treatment of animal husbandry breeding wastewater.

The invention discloses an advanced nitrogen and phosphorus removal technology. The technology includes the following steps: (1) biochemical treatment effluent from a municipal sewage treatment plant enters an ozone oxidation reactor and undergoes an ozone oxidation reaction under the action of an ozone oxidizer; and (2) ozone oxidation treated effluent obtained in step (1) is sent to a tubular membrane bioreactor divided into a water inlet zone, an aerobic zone and a facultative zone along a sewage flow direction, and undergoes biological nitrogen and phosphorus removal treatment, the water inlet zone is provided with an ozone filter layer to decompose ozone, the aerobic zone is used to realize phosphorus removal treatment, the facultative zone is used to realize nitrogen removal treatment, effluent goes through a sedimentation tank and then is discharged, and parts of sludge returns to the tubular membrane bioreactor. The method has the characteristics of short flow, and stable nitrogen phosphorus removal effect, and the effluent finally obtained in the invention can meet the standards of industrial reuse water.

The invention provides a branching ring type oxidation ditch with adjustable gravity flow. The interior of the invention is an O type anaerobic zone, the exterior is an O type aerobic zone and the middle part is a C type anoxic zone. The intersection zone of a C type nick and the O type aerobic zone is a mixing zone, wherein, the radian of a C type circular arc separating wall that forms the anaerobic zone is 246 degrees, the length of the C type circular arc separating wall that stretches into the mixing zone is 0.41R and the R is the radius of a concentric circle separating wall of the aerobic zone, the angle Alpha at a starting end point of the C type circular arc separating wall that can be adjusted is equal to 10 degrees- 107 degrees and the alpha is an included angle formed by a line connecting the starting end point and the center of the C type circular arc separating wall and an adjustable branching wall. The structure can weaken the turbulence in the ditch, increase the volume occupancy of the plug-flow fluid in the ditch, promote the efficiency of a reactor, prolong the stopping time at the aerobic zone and the anoxic zone, decrease the stopping time at the mixing zone and the occupancy of a dead zone and leave out the energy consumption caused by a mechanical stirrer. Besides, the returning flow that enters into the aerobic zone and the anoxic zone can be flexibly adjusted and controlled based on different water quality, so as to gain stable nitrogen and phosphors removal effect that fully meets the discharge standards of the state.

The invention relates to an A2 / O-MBR composite processing system and method based on efficient utilization of carbon source, and belongs to the technical field of sewage treatment. The A2 / O-MBR composite processing system based on efficient utilization of carbon source mainly comprises an anaerobic tank, a first anoxic pond, an aerobic tank, an oxygen elimination tank, a second anoxic pond, and a membrane pool, wherein the anaerobic tank is connected with the first anoxic pond, the first anoxic pond is connected with the aerobic tank; the aerobic tank is connected with the oxygen elimination tank; the oxygen elimination tank is connected with the second anoxic pond; and the second anoxic pond is connected with the membrane pool. The A2 / O-MBR composite processing system and method based on efficient utilization of carbon source are aimed for requirements of enhanced nitrogen removal of high discharge standard municipal sewage treatment plant; the efficient utilization of carbon source and the enhanced nitrogen removal are achieved by adding the oxygen elimination tank and the anoxic ponds in the conventional A2 / O and MBR composite technology system, and using the oxygen elimination tank to remove the adverse effect of the dissolved oxygen to the technology denitrification in the backflow nitrified liquid, and completely using the inner source nitrification effect of the anoxic pond. The A2 / O-MBR composite processing system and method based on efficient utilization of carbon source have the advantages that the utilization ratio of carbon source is high, the effect of denitrification and dephosphorization is good, the water quality of the discharged water is good, the ability to resist impact load is strong the effect of saving energy and reducing consumption is obvious, and the like.

The invention relates to preparation and application methods of a bioactive compound filling material and belongs to the technical field of sewage treatment in environmental engineering. In order to improve the biological characteristics of activated sludge in a biological sewage treatment system, a sludge enhancement pond is added to a sludge return section of a sewage treatment system based on activated sludge process, a special bioactive compound filling material is loaded in the pond to serve as a culture medium and a carrier of microorganisms, then a part of returned sludge in the sewage treatment system enters the sludge enhancement pond and stay for a while to fully contact the bioactive compound filling material, and subsequently the sludge returns to an aeration pond or coarse screen and a primary sedimentation pond used in activated sludge process according to different proportions. The invention has the positive effects of reducing the risk of sludge bulking, reducing the yield of sludge, eliminating odor in sewage and sludge treatment processes, and is suitable for the upgrading reconstruction of the conventional sewage treatment system based on activated sludge process.

The invention discloses an improved SBR wastewater treatment process for obtaining standard IV-class surface water. The process includes the following steps that wastewater is pretreated to remove SS in the wastewater; pretreated outlet water enters an SBR tank, 60 min of stirring, 60-80 min of first-time aeration, carbon source addition, 30 min of stirring, 10 min of second-time aeration, 40 min of precipitation and 60 min of drainage are carried out in sequence, and then a next period of treatment is carried out; supernatant liquid drained out of the SBR tank enters a coagulation reaction tank for chemical phosphorus removal; outlet water from the coagulation reaction tank enters a denitrification filter tank to further remove residual nitrate nitrogen; outlet water from the denitrification filter tank enters a disinfection tank, and after being disinfected, the water is drained. The steps of inlet water stirring, first-time aeration, carbon source addition and stirring, second-time aeration, precipitation and drainage are carried out in sequence in the SBR reaction tank, advanced nitrogen removal is carried out in combination with the post-denitrification filter tank, an advanced chemical phosphorus removal process is adopted, and thus a good nitrogen and phosphorus removal effect is achieved.

The invention discloses a process method for carrying out deep carbon removal, denitrification and desulfurization on early-stage landfill leachate by using UASB-SBR-EO treatment, and belongs to the technical field of carbon removal, denitrification and desulfurization. The process method is widely applied to deep treatment of high-concentration organic sewage, particularly has remarkable deep carbon removal, denitrification and desulfurization effect on early-stage landfill leachate, and comprises: carrying out front-end pretreatment by utilizing a UASB process to efficiently remove degradable COD so as to provide a good physicochemical environment for a subsequent anaerobic ammonia oxidation reactor. According to the invention, SBR is selected as an anaerobic ammonia oxidation reactor, the pH value and DO are reasonably controlled, and deep treatment of early-stage landfill leachate, ie., synchronous removal of organic matters, ammonia nitrogen and sulfate, is realized under withoutfeeding of external carbon sources; and strict control is carried out through an electrooxidation process to deeply remove refractory organic matters, so that the concentrations of organic matters, ammonia nitrogen and sulfate in the final effluent respectively are 87.511 mg / L, 18.545 mg / L and 3065 mg / L so as to respectively achieve the organic matter removal rate of 99.4%, the ammonia nitrogen removal rate of 97.6% and the sulfate removal rate of 79.9% and completely meet the sewage discharge requirements.

A hypoxic / anaerobic UASB-SBR landfill leachate short-range biodenitrification method and device belongs to the biological treatment technology field of wastewater. A hypoxic / anaerobic UASB-SBR biochemical system is used for achieving synchronous and deep removal of organic matters and nitrogen in landfill leachate by the short-range biodenitrification. By using the way of the return of SBR nitrification liquid, not only a certain degree of dilution function is carried out on the original leachate, but also the nitrification liquid containing rich NO2<->-N can conduct denitrification with the help of rich organic carbon sources in raw water, so two functions of denitrification (hypoxic reaction) and methane generation (anaerobic reaction) are achieved in the same UASB reactor, the removal rate of more than 94.4 percent of organic matters and the denitrification rate of more than 99.5 percent are obtained, and the dual objectives of biological nitrogen removal and organic matter removal are achieved. The SBR reactor obtains over 99.5 percent of nitrification and denitrification rate; the effluent total nitrogen is less than 20mg / L; and deep nitrogen removal is obtained. In addition, pH, ORP, and DO are used as the control parameters in the biological nitrogen removal process of an SBR system, so the nitrification and denitrification terminals of the SBR reactor can be accurately monitored, and the operating cost is saved.

The invention discloses an artificial wetlands system for purifying roof rainwater containing washing wastewater. The artificial wetlands system comprises a rain and sewage diversion well, a water distributor, a wetland treatment area, a collector pipe and a flood discharge ditch which are connected in sequence, wherein a diverter valve is arranged in the rain and sewage diversion well; the water outlet of the rain and sewage diversion well is connected with the flood discharge ditch and the water distributor; the water distributor is arranged above the wetland treatment area; the collector pipe is arranged at the bottom of the wetland treatment area; and the wetland treatment area is composed of vertical filter layers. When rainstorm flowing into the rain and sewage diversion well has a high water level, the diverter valve is opened, and rainwater is discharged into the flood discharge ditch; when washing wastewater flowing into the rain and sewage diversion well has a low water level, the diverter valve is closed, and the washing wastewater enters the water distributor through the rain and sewage diversion well; and the washing wastewater vertically flows into the wetland treatment area through the water distributor, is separated and purified by the vertical filter layers in the wetland treatment area and then is collected by the collector pipe to gather in the flood discharge ditch so as to be discharged. The washing wastewater is subjected to proper treatment and then enters a rainwater pipe network system or is discharged into a river, so that pollution of the river is avoided.