138results about How to "Organic load reduction" patented technology

An integrated bioreactor and its applications as well as a method for treatment of highly-concentrated organic wastewater using the same. The integrated bioreactor with a concentric columnar structure includes an inner layer and an outer layer, in which the inner layer is an upflow anaerobic sludge blanket (UASB) and the outer layer is a moving bed biofilm reactor (MBBR). The effluent of the MBBR is recycled into UASB via a reflux pump mounted between a water tank and the integrated bioreactor. A water outlet of the UASB is arranged with an on-line pH monitor and a mechanical agitation device is arranged on the top of a bottom water distributor. The bioreactor is low in cost, features friendly maintenance, stable operation, and high degree of automation, and can be applied under low temperature.

A/O biological biologic denitrifying reactor, adjustment of nitration process, its fuzzy on-line controller and controlling method are disclosed. The process is carried out by stirring in oxygen-deficient area continuously, denitrifying reacting, aerating in oxygen area continuously, enlarging opening of aerator air intake valve with higher ammonia nitrogen water charge load or lower ammonia nitrogen outfall concentration, decreasing opening of aerator air intake valve reversely, shutting or opening air intake vale with different grid chambers, opening or shutting stirrer in related reaction pool, and enlarging or decreasing opening of refluxing mud valve to adjust mud concentration in reactor. It achieves higher efficiency and less consumption.

The invention discloses a totally-closed all-transparent intellectualized organic prawn ecological breeding device and belongs to a product and a technical system for prawn aquiculture. The totally-closed all-transparent intellectualized organic prawn ecological breeding device solves various prawn farming industry faced difficulties and problems such as water quality oxygen deficit, bottom material oxygen deficit deterioration, bacterial and viral diseases, stress reaction, antibiotic residue, drug residue, difficult biophysical chemistry environmental index regulation, high death rate and low survival rate, achieves transition from a traditional prawn pond culture mode to a totally-closed all-transparent full-automatic factory-like intellectualized multilayer grading running water ecological breeding mode with low costs, timely and accurately adjusts water quality biophysical chemistry environmental indexes such as the water quality illumination, the light quality, the temperature, the salinity, the dissolved oxygen, the nutritive salt, the carbon dioxide, a PH (Potential of Hydrogen) value, the transparency, the ammonia nitrogen, the nitrite, the sulfuretted hydrogen, organic matters, bacterial phases, algal phases, insect phases, food organism varieties and the density and produces various aquatic products satisfying market requirements.

The invention discloses a treatment method of a concentrated solution produced from landfill leachate by a membrane method. The treatment method comprises the following steps of enabling the concentrated solution produced from the landfill leachate by the membrane method to sequentially pass through a composite softening coagulation and sedimentation pond, an ozone oxidation reactor, a hydrolyzing pond and an anaerobic MBR pond, and enabling effluent water from the anaerobic MBR pond to enter a nanofiltratoin system; enabling a permeation solution obtained through treatment of the effluent water in the nanofiltratoin system to be treated by a pressure contact oxidation reactor, and directly discharging the treated permeation solution, or after filtering the treated permeation solution by a multi-medium filter, discharging the filtered permeation solution; mixing a concentrated solution obtained after treatment by the nanofiltratoin system with the landfill leachate so as to obtain a mixed solution; and performing concentration treatment on the mixed solution by a biochemical method, an MBR method and the membrane method so as to obtain a concentrated solution, enabling the concentrated solution to enter the composite softening coagulation and sedimentation pond, and performing subsequent operations. The treatment method disclosed by the invention not only is suitable for treatment of the concentrated solution produced from the landfill leachate by membrane filtration, but also is suitable for treatment of other membrane concentrated solutions containing high concentration of organic compounds which are difficult to degrade.

The invention relates to a printing and dyeing wastewater pretreatment method based on an anoxic zone phase separation technology. According to the printing and dyeing wastewater pretreatment method, an anoxic zone is divided into a phase I and a phase II, namely a phase for hydrogen production and acid production through fermentation and a methanogenesis phase; an electron donor is provided by organic matters in the wastewater, and dye is effectively decolored in the phase I by using a sulfate reducing process and the reducing capacity of reduzate, namely the sulfide, therefore the biodegradability of the wastewater is improved; and the organic matters can be efficiently removed in the phase II. As an anoxic phase transformation technology in the printing and dyeing wastewater treatment course, the printing and dyeing wastewater pretreatment method is used for providing a two-phase anoxic system and carrying out pretreatment on the printing and dyeing wastewater; the chromaticity and the COD (Chemical Oxygen Demand) removal rates can be effectively increased, the biodegradability of the wastewater can be greatly improved, and the defects that a traditional anoxic process is instable in treatment effect, large in sludge yield and the like are overcome. The printing and dyeing wastewater pretreatment method can be used for effectively removing chromaticity and COD in the printing and dyeing wastewater, the removal rates of the chromaticity and the COD respectively reach more than 95 percent and 60 percent, and the organic loading to subsequent procedures is greatly reduced.

The invention discloses a method for preprocessing neopentyl glycol industrial wastewater by catalytic oxidation. The invention is to remove formaldehyde and some organic matters from wastewater under a certain condition by adding a catalyst and 30wt% of hydrogen peroxide in the wastewater. The method for preparing the catalyst comprises the following steps: adding a porous inorganic oxide carrier in metal nitrate solution or acetate solution with mass fraction of 1.0-6.0% and mixing uniformly; dipping for a certain time; and drying and baking to obtain the catalyst. The removing rate of formaldehyde is above 89%, the removing rate of CODcr is above 50%, and preprocessed neopentyl glycol industrial wastewater can be processed thoroughly to meet emission standard by a common biological method.

The invention provides a machining wastewater treatment technology. The machining wastewater treatment technology comprises steps as follows: after wastewater passes through a grid pool and large-particle substances are intercepted, the wastewater enters a demulsification pool and is subjected to demulsification for phosphorous removal, then enters an air floatation machine for air floatation separation, enters an anaerobic pool, an anoxic pool and an aerobic pool sequentially for biochemical treatment, enters a sedimentation pool for solid-liquid separation and is finally filtered, sterilized and discharged when up to the standard. The machining wastewater treatment technology adopts a simple procedure and is low in operating cost, the operation is safe and reliable, and the water quality is stable and reaches the standard.

The invention discloses a high concentration organic nitrogen waste water processing technology. The high concentration organic nitrogen waste water processing technology is mainly used for processingof organic waste water high in raw water total nitrogen, is capable of realizing high efficiency low consumption removing of carbon and nitrogen with a denitrification unit used for supplying a partof carbon sources, the total nitrogen, ammonia nitrogen, and chemical oxygen demand of discharged water are capable of reaching discharge standards. The high concentration organic nitrogen waste waterprocessing technology comprises following steps: high concentration organic nitrogen waste water is introduced into an anaerobic pond; water discharged from the anaerobic pond is introduced into a first sedimentation basin; a supernatant discharged from the first sedimentation basin is introduced into an anoxic pool, a part of bottom sludge from the first sedimentation basin is discharged, and the other part of bottom sludge from the first sedimentation basin is recycled back into the anaerobic pond; water discharged from the anoxic pool is introduced into a second sedimentation basin; a supernatant from the second sedimentation basin is introduced into an aerobic tank, and bottom sludge from the second sedimentation basin is discharged; water discharged from the aerobic tank is introduced into a third sedimentation basin; after precipitation in the third sedimentation basin, bottom sludge is discharged, and an obtained supernatant is recycled back into the anoxic pool; after anoxic pool reaction, obtained water is introduced into the second sedimentation basin, and then is introduced into the aerobic tank, and after reaction, water from the aerobic tank is introduced into the third sedimentation basin, and then is discharged.

The invention belongs to the field of chemical wastewater treatment of the petrochemical industry and particularly relates to an efficient treatment combination process of acrylonitrile wastewater. The combination process comprises: (1) acrylonitrile production wastewater enters a catalytic oxidation tower for catalytic hydrogen peroxide oxidation treatment; (2) water discharged form the catalytic oxidation tower and factory domestic sewage enter a biochemical treatment system after full mixing; the biochemical treatment system sequentially comprises an anaerobic hydrolysis tank, an anoxia tank and an MBR tank; (3) the biochemical treatment system adopts a membrane separation technique for treatment; partial concentrated solution flows back; the acrylonitrile production wastewater is wastewater produced by acrylonitrile device wastewater after four-effect evaporation and steam stripping; the temperature is 50 DEG C-80 DEG C; the hydraulic retention time in the catalytic oxidation tower is 30-120 min. According to the efficient treatment combination process of acrylonitrile wastewater, the microorganism poison inhibition effect of the biochemical treatment system microorganism can be reduced, the wastewater biodegradability is improved, the treatment load and the treatment cost of the catalytic oxidation tower are reduced, the denitrification effect is guaranteed, and the membrane service life is prolonged.

The invention discloses a moving bed biofilm reactor and its sewage treatment method. The biofilm reactor comprises a tank body, an inlet water barrel, a peristaltic pump, an aeration sand head and an air aeration machine, the tank body is filled with a filler, the filler is a K3 filler, the diameter and the height of the K3 filler are 2.5cm and 1.1cm respectively, the material of the K3 filler is polypropylene, the filling rate of the filler in the tank body is 40%, and the reactor also comprises a time controller in order to control the on/off and the running time of the peristaltic pump, the air aeration machine and a water outlet solenoid valve. Compared with the prior art, the sewage treatment method disclosed in the invention has the advantages of realization of aerobic and anoxic environment in a same reactor, realization of a synchronous nitrification and denitrification process in a single reactor, organic load and aeration rate reduction, capital construction and operation cost reduction, and reaching of a good nitrogen removal effect.

The invention discloses a wastewater treatment device and a wastewater treatment technology. The wastewater treatment device comprises a water storage tank, a microbial water purification tank, a flocculation tank, an adsorption tank, an acid-base adjustment tank, a filter membrane, a water inlet pipe, 4 water pump and connecting pipe assemblies, four water pumps, a water outlet pipe and an intelligent controller, wherein the water storage tank, the microbial water purification tank, the flocculation tank, the adsorption tank and the acid-base adjustment tank are orderly connected through thewater pump and connecting pipe assemblies. Through reasonable matching and order adjustment of components such as the water storage tank, the microbial water purification tank, the flocculation tank,the adsorption tank, the acid-base adjustment tank, the filter membrane and the like, the wastewater treatment device has high treatment effect, low wastewater treatment cost and high treatment stability and treatment capacity.

The invention belongs to the field of sewage treatment and particularly provides a process for efficient separation of an organic carbon source in sewage and energy development and utilization. Most of suspended organic substances, colloid and parts of soluble organic carbon in raw water settle and are swept under the dual effects of a microbial flocculant and a macromolecular organic flocculant and are separated out of the sewage in the form of primary sludge, the primary sludge is mixed with biological sludge produced at a biological stage, anaerobic fermentation is performed to produce methane, and effluent at an organic carbon source separation stage is subjected to nitrogen and phosphorus removal at the biological stage. The process achieves organic carbon source separation before the biological stage, enables organic carbon to efficiently settle before the organic carbon enters cell walls, reduces the organic load at the biological stage, adopts a denitrifying phosphorus removal process to achieve the separation of the residual carbon source in the effluent and efficiency removal of ammonia, nitrogen and phosphorus, meanwhile achieves the multiple effects of reduction of aeration energy consumption, sludge output and greenhouse gas amount and the like, and has remarkable economic and environmental benefits.

Highly effective vesicular compositions from UV-absorbing lipids are described in the present invention. Combination of UV-absorbing property and the vesicular delivery system results in higher levels of photoprotection to skin and hair. The vesicular compositions of the present invention are made from cationic UV-absorbing lipids of Formula I wherein,

ArCO is selected from cinnamoyl, p-methoxy cinnamoyl, p-N,N-dimethylamino benzoyl and combinations thereof, R₁ is selected from saturated or unsaturated alkyl group with carbons ranging from C₁₀ to C₂₂.

The invention belongs to the field of recycling treatment of sludge and relates to an external circulation two-stage sludge anaerobic digestion system and an application thereof. The system comprises a primary high-temperature anaerobic digestion reactor (1), a circulating reflux system (2), a secondary medium-temperature anaerobic digestion reactor (3), a methane pool (4), a sludge collecting pool (5), a sludge mixing pool (6) and a pretreatment device (7), wherein the circulating reflux system (2) is arranged between the pretreatment device (7) and the primary high-temperature anaerobic digestion reactor (1). The system organically combines the technologies of performing two-stage anaerobic digestion, hydrolyzing organic matters at a high temperature, performing circulating reflux and the like, combines a physical enhanced treatment technology with a microbiological treatment technology, really realizes high-efficiency utilization of organic substrates, can exert highest activity of bacteria in two sections, and improves the operational stability of the whole system.

The invention discloses an efficient compound biological treatment device which comprises a centrifugal blower 7, a water inlet pipe 1, a water quality improving pool 3, a mixing pool 10, a biochemical pool 17, a degassing pool 22 and a settling pool 25. The water quality improving pool 3 and the mixing pool 10 containing a water distribution plate are additionally arranged in front of the biochemical pool 17 ; the biochemical pool 17 is connected with the degassing pool 22 by a water outlet trough 29; the degassing pool 22 is connected with the settling pool 25 by a pipeline 24; the biochemical pool 17 is internally and simultaneously provided with a jet device 13, and an aeration hose 30 and an ejetor air supply valve 32 that are connected with the centrifugal blower 7; the biochemical pool 17 is internally provided with two overflowing troughs, wherein one overflowing trough is a returning trough 28 with the yielding water entering the mixing pool 10 and being connected with the feed water; the other overflowing trough is a water reflowing trough 29 with the yielding water being connected with the degassing pool 22 so as to remove the micro-bubbles in the mud which enters the settling pool 25; and the mud in the settling pool 25 flows back to the mixing pool 10 and is homogenized with feed water. In the invention, the device has the advantages of reducing energy consumption, improving processing efficiency of high-concentration industrial wastewater and facilitating maintenance and management, and the like.

The invention relates to a process for treatment of high density aquaculture sewage. The process is characterized by: pumping high density aquaculture sewage into a microbial flocculation reactor, and adding a Bacillus subtilis seed bacterial solution subjected to activation culture, with the seed bacterial solution and the culture sewage being in a volume ratio of 1-3:100; disposing aeration equipment evenly at the bottom inside the reactor, and controlling the gas-water ratio at 2-2.5:1 and the dissolved oxygen at a concentration of 2-3mg/L; fully mixing the pumped sewage with the seed bacterial solution added therein for 0.8-1.2h under a blast aeration effect to produce biological flocculants decompose organic matters and proliferate microorganisms; leaving the mixed solution generated in the microbial flocculation reactor to flow through a sedimentation-biotreatment reactor, which relies on natural ventilation for oxygen supply and is filled with a suspending biological filter material at a filling rate of 25-30%; performing solid-liquid separation and biochemical reaction on the mixed solution in the sedimentation-biotreatment reactor; and subjecting the generated sediment, except for part of returned sludge, to centralized discharge, returning the sludge to the microbial flocculation reactor, and returning pure water to a culture pool.

Provided is a treatment system for high concentrated organic wastewater, which comprises a flocculent sedimentation tank, a filter tank and a soil filtration device, wherein the soil filtration device comprises a casing made of anti-seep materials. The bottom portion inside the casing is a rinsing area, the end portion of the rinsing area is provided with a water outlet, and a bearing permeable stratum, a gravel stratum and a soil preparation stratum are sequentially arranged above the rinsing area. A separation layer is arranged between the gravel stratum and the soil preparation stratum, the middle upper portion of the soil preparation stratum is provided with a purifier in which a water giving-off pipe is disposed, and the filter tank is communicated with the water giving-off pipe via a water inflow device. The treatment system is capable of effectively removing the content of COD, BOD, SS and ammonia nitrogen in the water, is simple and convenient in operation and management, hard in being blocking up and small in accommodation area, and is adaptable to treatment systems for high concentrated organic wastewater of small and medium-sized food manufacturing enterprises.

The invention discloses an anaerobic digestion sludge dewatering method. By adopting the anaerobic digestion sludge dewatering method, secondary utilization can be performed on sludge, the sludge is prepared into a sludge activated carbon material firstly, sludge activated carbon and a biological flocculant are adopted for combined conditioning, and deep dewatering of the sludge or anaerobic digestion sludge is realized; by taking the sludge activated carbon as a skeleton structure substance, the floc structure strength of the sludge is strengthened through the hydrophobic interaction, viscousmacromolecular organic matters including humic acid and proteins and the like in a liquid phase of the anaerobic digestion sludge are removed synchronously, the filter performance of the sludge is improved, an organic load of subsequent reflux biochemical treatment is lowered; and then by further utilizing the biological flocculant for coagulation, sludge-water separation is promoted, and efficient deep dewatering of the anaerobic digestion sludge is realized. The dewatering method provided by the invention is an environment-friendly conditioning method and can improve the filtering and dewatering efficacy of the anaerobic digestion sludge specially aiming to the characteristics of small particles, high concentration of a dissolved microbial metabolite, poor filter performance and the like of the anaerobic digestion sludge.

The invention relates to a sewage pretreatment device with a slag-removal, coupling and air-driving biological rotating disc integrated structure. The sewage pretreatment device comprises a sewage draining pipeline and a sewage treatment pool. The sewage pretreatment device is characterized in that a partition wall I is arranged in the sewage treatment pool to divide the sewage treatment pool into a slag removal treatment pool and a biological treatment pool from front to back; a water passage I is arranged in the partition wall I, a grid is arranged at the water passage I, and the slag removal treatment pool is communicated with the biological treatment pool through the water passage I; an air-supplanting and oxygen-supplying pipeline and a biological rotating disc are arranged in the biological treatment pool, an air outlet of the air-supplanting and oxygen-supplying pipeline faces to the biological rotating disc, an air inlet of the air-supplanting and oxygen-supplying pipeline is communicated with atmosphere to generate atmospheric pressure difference to drive the biological rotating disc to rotate, and therefore, the biological rotating disc integrated structure with the slag removal, coupling and air driving functions is configured. The sewage pretreatment device is small in occupied area and can be used for effectively separating impurities in sewage and carrying out bio-enzyme catalysis.

The invention discloses a sewage treatment process for recovering N-methyl pyrrolidone. The sewage treatment process comprises the following steps: pretreating high-concentration wastewater, wherein the pretreating sequentially comprises catalytic cracking, high-voltage pulse electrolysis and coagulating sedimentation; obtaining pretreated wastewater; carrying out biochemical treatment; sequentially carrying out mixing homogenization, anaerobic reaction, hydrolytic acidification and contact oxidation on the pretreated wastewater in the step (1); obtaining biochemical treatment water; ensuringtreatment; and sequentially carrying out precipitation reaction, multi-medium filtration and active carbon filtration on the biochemical treatment water in the step (2) to finish recovery. The methodhas the advantages of low process cost, high efficiency, good recovery effect and good wastewater treatment effect, and can be widely popularized and used.