72results about How to "Increase sludge concentration" patented technology

The active sludge-biomembrane compounding integral sewage treating method includes the first leading the sewage to be treated to the anoxic area through stirring for mixing sewage to be treated and active sludge, the subsequent leading the sewage to aerobic area with stuffing for aeration treatment with combined active sludge and biomembrane, and final leading the sewage to the precipitation area for natural deposition to separate sludge and water, leading out purified water, reflowing the mixed sludge liquid to the anoxic area and draining the residual sludge. The present invention also relates to the corresponding sewage treating apparatus. The present invention has the advantages of high treating capacity, resistance to impact load, simple operation, etc. and is especially suitable for use in medium and small towns.

The invention discloses a multi-level biological nitrogen and phosphorus removal sewage treatment method. The method comprises the following steps of: introducing sewage into an anaerobic pond; introducing the sewage treated in the anaerobic pond into an anoxic pond at the front section of an anoxic-aerobic treatment unit; draining all sewage into a settling pond through an aerobic pond of the last level; draining the settled sludge into a returned sludge concentration pond; draining supernatant in the returned sludge concentration pond into the aerobic pond of the last level; and draining the sludge in the returned sludge concentration pond into the initial anaerobic pond through a pre-anoxic pond for circular treatment. The invention also provides a corresponding treatment device. The method and the device have the advantages of only adding the returned sludge concentration pond and the pre-anoxic pond compared with the A2O process in the prior art and improving the reaction efficiency by adjusting the connection relationship among the reaction ponds.

The invention belongs to the technical field of sewage treatment, and relates to a parallel anaerobic-anoxic-oxic (A2O)-membrane bioreactor (MBR) denitrifying phosphorus removal method. Adopted devices comprise an oxic tank, an anaerobic tank, an anoxic tank and a membrane tank, wherein the oxic tank is connected in parallel with the anaerobic tank; sewage to be treated and external reflux sludge are mixed in a distribution well and flow into the oxic tank and the anaerobic tank according to a proper proportion respectively, and internal reflux mixed liquid which reflows from the anoxic tank also flows into the oxic tank simultaneously; sewage which flows out of the oxic tank and sewage which flows out of the anaerobic tank are mixed and flow into the anoxic tank together for denitrifying phosphorus removal; and the sewage enters an MBR tank for sludge and water separation, and a part of residual sludge serves as the external reflux sludge to be fed into the distribution well. The parallel A2O-MBR denitrifying phosphorus removal method can be used for the new construction and modification engineering of a biological denitrifying phosphorus removal sewage plant, the volume and the aeration amount of an aeration tank can be reduced, and a secondary sedimentation tank can be eliminated simultaneously, so that the floor space of an urban sewage plant is reduced.

The invention discloses an integral multistage biological membrane wastewater treating device, comprising tank, filling material, influent pipe and exhaust pipe. The said tank comprises a quaternary concentric circle, and the outer circle is separated into different reaction areas by baffle board with alternative operation of aerobic and anaerobic, semi-flexible composite filling material is equipped in every reaction area, the intermediate circle is filled with semi-flexible composite filling material, the inner circle is the settling area and the center is the sterilizing area. The said influent pipe is connected with the reaction areas of the outer circle, and supplies water in point, the reaction areas of the outer circle is connected with intermediate circle, inner circle and central sterilizing area in order through water pipe, the exhaust pipe is connected with the central sterilizing area to extends out and the underwater aerator is installed in the bottom of the outer circle and intermediate circle. The device is characterized by the resistance to impact load, high treating effect, low running energy consumption, small surplus sludge, short process, little accommodation area, low investment and convenient management.

The invention relates to a biological treatment method of coal chemical wastewater, which adopts a biological reaction-muddy water separation integrated bioreactor. The method comprises the following steps of: sequentially feeding materialized and pre-treated coal chemical wastewater into an anaerobic bioreactor, an anoxic bioreactor, a first-stage aerobiotic bioreactor, a second-stage aerobiotic bioreactor and a third-stage aerobiotic bioreactor, selecting each aerobiotic bioreactor to discharge water and inflow into the anoxic bioreactor; and carrying out anaerobic acidification treatment by the anaerobic reactor, reinforcing a biological denitrification reaction in the anoxic reactor to remove non-gradable organic matters, completely decarbonizing by the first-stage aerobiotic bioreactor, and realizing the short-course nitratlon reaction and the whole-course nitratlon reaction by the second-stage aerobiotic bioreactor and the third-stage aerobiotic bioreactor, wherein the sludge concentration in the reactor can be guaranteed to be greater than 8mg/L due to the biological reaction-muddy water separation integrated bioreactor, the sludge age is greater than 60 days, the specific strains can be preferably cultured, and the function realization of a novel method can be guaranteed. The coal chemical wastewater is treated by the method, so that the discharged water can reach the requirement of the national wastewater comprehensive discharge standard.

The invention relates to a method for using signal molecules for accelerating repair of disintegrated aerobic granular sludge. According to the method for using the signal molecules for accelerating repair of the disintegrated aerobic granular sludge, by adding the exogenous AHLs signal molecules to repair the disintegrated the aerobic granular sludge, in a process of repairing structures of the disintegrated aerobic granular sludge, regranulation of the crushed granular sludge is accelerated, after 20-30 days, the disintegrated aerobic granular sludge is basically and completely repaired, therepaired aerobic granular sludge is smooth in particle surface, regular in shape and compact in structure, and has good settling performance, after adding of the exogenous AHLs is stopped, the granular sludge structures are still intact, and the settling performance and the granule density remain at high levels. According to the method for using the signal molecules for accelerating repair of thedisintegrated aerobic granular sludge, by adding the exogenous AHLs temporarily, an excellent repairing effect on the disintegrated aerobic granular sludge is achieved, the repaired granular sludge is intact in structure and good in settling performance, moreover, operation is simple, and practical application is easy.

The invention relates to a baffling anaerobic reactor, comprising two or more sets of multistage baffling anaerobic reaction tanks, wherein each set of the multistage baffling anaerobic reaction tanks further comprises a sedimentation tank and a sludge return pipe to allow a mixed solution coming from the last stage of the set to enter into the sedimentation tank to separate a supernatant and a concentrated mixed solution, allow the supernatant to enter into the first stage of the next set, and allow the concentrated mixed solution to enter into the first stage of the set through the sludge return pipe. The invention further relates to a sewage treatment unit containing the baffling anaerobic reactor and a sewage treatment method using the baffling anaerobic reactor.

The invention discloses a method for treating municipal sewage by adopting a millipore FBR (Filter Bio-reactor), belonging to the technical field of resources and environments. The municipal sewage can be treated by adopting a mode of combining aerobic denitrification with a dual-layer millipore filter tank in the method, thus pollutants, such as NH3-N, TN (Total N), COD, SS, TP (Total Phosphorus) and the like, in the municipal sewage can be greatly effectively reduced, the treated discharge water can reach the national earth surface IV class water standard, wherein CODCr is not more than 30mg/l, NH3-N is not more than 1.5mg/l, the total N (lake, reservoir, in the terms of N) is not more than 1.5mg/l, the total phosphorus (in the terms of P) is not more than 0.3mg/l, and the potassium permanganate index is not more than 10. The discharge water can be directly discharged in an earth surface riverway so as to reduce the environment pollution and meet the requirement on the increasingly improved municipal sewage emission standard. The invention can be applied to building municipal sewage treatment plants and modifying and reconstructing the traditional sewage treatment plants.

The invention discloses an MBBR (Moving Bed Biofilm Reactor) high-standard sewage treatment system and a treatment process and belongs to the technical field of sewage treatment. The problems in the prior art that a treatment process of the traditional sewage treatment plant is high in effluent TN concentration, low in integration level, low in load, high in carbon source requirement and common ineffect of removing nitrogen, phosphorus and SS are solved. The sewage treatment system comprises an anaerobic zone, an anoxic zone I, an anoxic zone II, a flocculation zone, a settling zone, a biofilm zone, a buffer zone, a denitrification filter zone, an effluent zone and pipelines for connecting the zones. According to operations of adjusting reflux, controlling the sludge concentration, setting parameters of the suspended carrier filling rate in the biofilm zone and DO, setting the carbon source addition amount and backwash frequency in the denitrification filter zone and the like, by utilizing the characteristic of denitrifying phosphate-accumulating organisms, the settling zone is arranged on a middle section of biochemical treatment, the biofilm process is coupled to the denitrification filter process, and the sewage treatment system disclosed by the invention has the advantages that the integration level is high, nitrogen and phosphorus can be synchronously removed, the carbonsource is saved, the concentrations of the nitrogen, phosphorus and SS in the effluent are low, the load is high, and the operation is simple.

The invention discloses a mechanical internal circulation jet-flow anaerobic reactor and a wastewater treatment method thereof, and belongs to the technical field of biological sewage treatment. The mechanical internal circulation jet-flow anaerobic reactor comprises a reactor tank body, a multi-phase separator, a water outlet weir and an internal circulation jet-flow device, wherein the internal circulation jet-flow device comprises an upper part and a lower part; the upper part comprises a jet-flow hole, a diffusion hole, a flow guide pipe and a flow stabilization hole; the lower part comprises a motor, a rotary shaft and high-speed blades. The wastewater treatment method comprises the following steps: forming a fluidized bed layer, forming a suspended bed layer, separating a separation region and discharging water from the water outlet weir. Due to the use of the internal circulation jet-flow device, the difficult problems of low treatment load, instable effect and relatively narrow application range in the treatment process of an existing conventional anaerobic reactor are solved; the mechanical internal circulation jet-flow anaerobic reactor has the advantages of high treatment load, good water impact resistance, high concentration of biological toxicity resistance matters, quick starting and the like.

The invention relates to an anaerobic-anoxic/aerobic-parallel reinforced dephosphorization and denitrification technique which comprises the following steps: raw water is introduced into an anaerobic tank and treated by the anaerobic tank, enters an anoxic tank, is treated by the anoxic tank, and enters an aerobic tank; part of water flow treated by the aerobic tank flows back to the anoxic tank, and the rest enters a secondary precipitation tank to precipitate; the supernate in the secondary precipitation tank is discharged; and the precipitated sludge is partially discharged and partially flows back to the anoxic tank to enter the anaerobic tank together with the raw water. The technique is characterized in that part of the water flow treated by the anaerobic tank is introduced into the pre-anoxic tank and mixed with return sludge of the secondary precipitation tank to remove nitrate nitrogen in the sludge, and flows back to enter the anaerobic tank together with the raw water. The technique is suitable for any sewage in need of denitrification and dephosphorization treatment. The technique effectively solves the problem of lower dephosphorization efficiency since nitrate nitrogen carried by the return sludge destroys the anaerobic environment, and provides sufficient organic matters for anaerobic phosphorus release. The technique reduces the volume of the anoxic tank and anaerobic tank, lowers the power consumption and enhances the dephosphorization efficiency.

The invention relates to a waste water treatment device for synchronously removing nitrogen and phosphorus of sludge concentration microenvironment, comprising an anaerobic pond, two anoxic ponds, two oxidation ponds, two sedimentation ponds, an internal reflux pump, an external reflux pump, pipelines, a dissolved oxygen control device, an inlet water carbon source distribution device, an internal reflux positive displacement pump and an external reflux positive displacement pump; the dissolved oxygen control device is provided with a dissolved oxygen controller B and a dissolved oxygen concentration meter; the inlet water carbon source control device is provided with a nitrate nitrogen-concentration controller A and a nitrate nitrogen concentration meter; and the waste water treatment device is further provided with an internal reflux control device and an external reflux control device. The process utilizing the waste water treatment device comprises the following steps of setting control data of a controller C of the internal reflux pump A; setting control data of a controller D of the external reflux pump B; setting control data of the dissolved oxygen controller B and the nitrate nitrogen concentration controller A; and opening an inlet water gate and all machines and electric control parts for running. The invention is suitable for waste water treatment, and has simple process, energy saving, low cost and high water outlet efficiency and good quality.

The invention relates to a coking wastewater optimizing treatment process and device. The process is as follows: light oil and heavy oil contained in the coking wastewater are firstly removed in an oil separator; then air flotation treatment is carried out to reduce ammonia nitrogen; water distribution is carried out in a regulating tank; after water distribution, 70% of the coking wastewater is introduced into an aerobic tank 1, and 30% of the coking wastewater is introduced into an anaerobic tank; after the coking wastewater is subjected to treatments in the aerobic tank 1, a sedimentation tank I, the anaerobic tank, an aerobic tank 2, a sedimentation tank II, a coagulative precipitation tank and a deep treatment tank in sequence, the quality of the final effluent is as follows: COD is lower than 80 mg/L, ammonia nitrogen is lower than 10 mg/L, volatile phenol is lower than 0.3 mg/L, cyanogen is lower than 0.2 mg/L, oil and suspended solids are basically removed, and water quality indicators meet the discharge standards. According to the invention, the process route is short, the equipment investment cost is low, the processing efficiency is high, the effect is stable, energy conservation and cost reduction are achieved, and economic and social benefits are remarkable.

The invention discloses a pressurizing and aerating MBR (Membrane Bioreactor) water treatment device. The device comprises a tower body, wherein a guide plate, a gas diffusion system, an MBR membrane system, a support rid and a pressure sensor are arranged in the tower body from bottom to top. The tower body is further internally provided with a drainage straight cylinder. The gas diffusion system is connected with a gas storage tank, an air compressor and a pressure adjusting work station out of the towel body sequentially through a gas inlet tube. The pressure adjusting work station is further communicated with the pressure sensor. With the adoption of the device provided by the invention, advantages of two processes of pressurizing and aerating and MBR membrane treatment can be coordinately and perfectly exerted, and the treatment efficiency and the removal rate of pollutants are remarkably superior to those of common aerobic biological treatment.