44results about "Sustainable biological treatment" patented technology

The invention essentially relates to a filter material for treating sewage, in particular to relate to a filtering material used in the sewage process technique of aeration biology filtering pool. The filtering material of sewage process of the aeration biology filtering pool is characterized in that the components of the raw material of the filtering material consists of by fly ash of 60 to 75 percent, portland cement of 10-20 percent, quick lime of 10-20 percent, gypsum 3-5 percent and degreasing aluminum powder of 0.06-0.08 percent. The preparation includes the following steps of pulping, stirring, pouring, cutting forming and ball milling. Under the optimal proportion of the air and water and the optimal water force load, the life sewage is treated by the aeration biology filtering pool with adding the fly ash to the gas concrete particle. When the average concentration of the water inlet is 176mg/L, the average removal rate of the CODis 75.3 percent, the average concentration of water inlet is 42.7mg/L, the average removal rate of the NH3-N is 96.4 percent, the average concentration of the water outlet is 0.87mg/L which meets the GB18918-2002 grade A standard of the sewage discharging.

A wastewater treatment method and apparatus including a denitrification (anoxic) chamber for denitrifying wastewater, an aeration basin with Bio-Wheel for aerating the wastewater, and a membrane device in which sludge particles are separated out of the wastewater, leaving clean discharge water and reusable sludge. Sludge from the membrane chamber floor is sent back to the aeration basin or denitrification chamber or both. Excess sludge is wasted or held for further processing. Preferably, the method and apparatus facilitate both activated sludge and fixed film processes.

The invention discloses a method for constructing a multi-stage subsurface flow constructed wetland system, and the method comprises the following steps: (1) selecting a littoral zone with a slope as a wetland pond or digging and backfilling to get a wetland pond with a slope; (2) grading and filling a matrix, namely designing stages according to the pollution load and the height difference of slope, and filling the matrix in each stage of the wetland; (3) arranging drainage holes, water outlet holes and water inlet holes; (4) planting plants, namely planting the plants on each stage of the wetland respectively. The method disclosed by the invention has the following beneficial effects: (1) the system constructed by the method has no influence on the coastal zone structure of a landscape water body. (2) the system constructed by the method has a better purification effect on water flowing into rivers and water contaminated by the landscape water body, especially has an obvious purification effect on pollutants such as SS (Stainless Steel), oil and COD (Chemical Oxygen Demand) and has a good removal effect on heavy metals, TN and TP. (3) the system constructed by the present invention can integrate the purification function with the greening of coastal zones, so that the diversity of landscape is enriched and the overall landscape effect is improved.

The invention discloses a novel filter material used in process of bio-aeration filter tank, which comprises (by weight percentage) coal ash 30-60%, adhesives 30-65%, lightweight porous granulate 1-8%, pore-forming agent 0.5-5%. The composition is prepared by using lightweight porous granulate with a finite grain size e.g. expanded perlite as core material, using coal ash, adhesives and pore-forming agent as cover material through mixing, spraying water onto core material, curing and solidifying.

The traditional waste water treating process with added denitriding and dephosphorizing functions includes: throwing chemical dephosphorizing agent in the last section of settling pit, water outlet of the primary settling tank, or the aerobic section and outlet of the aerobic pond, and refluxing 30-60 % of active sludge and partial residual sludge to the primary settling tank to make traditional waste water treating process possess dephosphorizing function; connecting serially aerobic zeolite biofitering pond to the last section of the second settling pond to eliminate ammonia nitrogen with zeolite and chemical and biological synergistic regeneration to maintain the stable adsorption capacity of zeolite. The present invention is suitable for upgrading waste water treating yard, and has low cost.

The invention discloses a magnetic bioreaction separation device for treating organic wastewater, which comprises a magnetic bioreactor and a rare-earth magnetic disc separation device, wherein the magnetic bioreactor consists of a reaction vessel, and microbe carrier magnetic species or magnetic zooglea formed by the microbe carrier magnetic species, which is placed in the reaction vessel; the magnetic bioreactor is connected with the rare-earth magnetic disc separation device by a flowing discharge pipeline; and the upper part of the rare-earth magnetic disc separation device is provided with a water outlet pipe, and the lower part thereof is provided with a sludge discharge valve. Since the invention utilizes the microbes attached to the microbe carrier magnetic species or magnetic zooglea to decompose the organic matter, while the magnetic zooglea and the treated water can be treated by the rare-earth magnetic disc separation device for solid-liquid separation, not only the cost on the investment and operation is lower than that of the membrane bioreactor, but also the separation efficiency is high, the energy consumption is low, and the effect on denitrification, phosphorous, SS, COD and BOD removal; and the invention is particularly suitable for treating the organic wastewater with large flow and high concentration.

The invention discloses a composite biological filter for treating high algae-laden and high ammonia-nitrogen raw water and an application method thereof. An overflow pipe, a water inlet unit, a sampling opening, a carrier filling area, a water outlet unit and an aerating device are arranged on a composite biological filter body unit from top to bottom in sequence, and suspended spherical biological filter materials, zeolite filter materials, granular active carbon filter materials and a supporting layer are arranged in the carrier filling area from top to bottom in a graded mode. The composite biological filter has the advantages that the spherical biological filter materials can effectively enrich a biological film to remove nitrogen elements and other pollutants in polluted raw materials, algae can be synchronously removed through adsorption, mechanical entrapment and other functions of zeolite and activated carbon, the head loss of an aerating filter can be effectively reduced through a special composite filter material structure, and the back flush frequency is lowered. Meanwhile, the aerating mode, hydraulic retention time and other technological parameters are optimized, and fast biofilm culturing decontamination of the spherical biological filter materials and efficient and low-consumption stable running of a system are achieved.

The invention discloses an integrated double-circulation oxidation ditch device for town sewage and a treatment method. The integrated double-circulation oxidation ditch device comprises an anaerobic zone, an anoxic zone, an aerobic zone and a secondary sedimentation tank which are communicated in sequence, the anoxic zone comprises a first anoxic zone and a second anoxic zone; the aerobic zone comprises a first aerobic zone and a second aerobic zone, and a reflux pump is arranged between the anoxic zone and the aerobic zone. The anaerobic zone, the anoxic zone and the aerobic zone are internally provided with submersible stirrers, and the anoxic zone and the aerobic zone are respectively provided with a partition wall and a guide wall to form circulation in each zone; and the synchronous denitrification and phosphorus removal effect of nitrate nitrogen is realized in the anoxic zone, so that the purposes of stably removing organic pollutants COD and removing nitrogen and phosphorus are achieved, the COD removal effect is improved, and the nitrification and denitrification nitrogen removal and phosphorus removal efficiency is improved. The integrated structure of the device has the characteristics of simple structure operation and low cost, and the investment and operation cost can be further reduced.

The invention provides a high-adsorption polylactic acid composite biofilm carrier material, which is prepared from the following raw materials by weight: 8-10 parts of diatomaceous earth, 14-18 partsof polylactic acid, 0.3-0.4 part of graphene oxide, 4-6 parts of cassava starch, 2-3 parts of gum arabic, 40-50 parts of polypropylene, 8-12 parts of chitosan, 2-4 parts of nanometer carbon sol, 3-5parts of lignocellulose, 1-2 parts of bentonite, 1-2 parts of hexadecyl trimethyl ammonium bromide, 0.5-1.5 parts of silica sol, 0.3-0.5 part of sodium humate, and 15-20 parts of water. The inventionfurther provides a preparation method of the high-adsorption polylactic acid composite biofilm carrier material. According to the present invention, the high-adsorption polylactic acid composite biofilm carrier material has advantages of light weight, large surface activation area, rich carbon source and low influence of environmental temperature change on adsorption performance; and the filler prepared from the high-adsorption polylactic acid composite biofilm carrier material has advantages of good fluidity, less agglomeration, good adsorption performance, corrosion resistance, duration, high efficiency and the like so as to further improve the water purification effect.

The invention discloses a starting method of nitrosated granule sludge for treating urban sewage, the method comprises the following steps: first inoculating the nitrosation to sewage plant mixed sludge, doubly diluting the urban sewage by using tap water to guarantee the stable operation of the nitrosation process; and then continuously improving water inlet flow to increase the hydraulic shear force, regulating aeration rate to guarantee a certain total nitrogen loss, oxygenation rate and nitrosation rate to granulate the flocculent sludge, and finally changing the water inlet as the unban sewage, and strengthening the treating performance. The starting of the nitrosated granule sludge for treating the urban sewage under the continuous flow mode is successfully realized.

The invention provides a combined membrane biological reaction device for micro-polluted source water treatment, relates to the combined membrane biological reaction device, and particularly relates to the combined membrane biological reaction device for the micro-polluted source water treatment. With the adoption of the combined membrane biological reaction device provided by the invention, the problems that the conventional membrane biological reactor has poor de-pollution effect on micro-polluted water, serious membrane pollution and short service life of a membrane assembly can be solved. According to the combined membrane biological reaction device provided by the invention, mixed liquor of attapulgite and activated sludge are filled in a reaction container; a water inlet pump is connected with a water distribution box through a pipeline; the water inlet pump is further connected with a reaction container through the pipeline; the output end of the air pump is communicated with the pipeline between the water inlet pump and the reaction container; a membrane component is mounted inside the reaction container; the membrane component is soaked inside the mixed liquor of the attapulgite and the activated sludge; the output end of the membrane component is connected with the input end of a water outlet pump through the pipeline; and the output end of the water outlet pump is connected with a clean water box through the pipeline. The combined membrane biological reaction device provided by the invention is used for treating sewage.

The invention relates to the technical field of sewage treatment, and especially relates to a strong positive pressure spray aeration system. The system comprises an aeration tank having a hollow structure, nozzles, a water pump and an oxygen generator, the liquid phase inlets of the nozzles are communicated with the water outlet of the water pump through water inlet tubes, and the water inlet ofthe water pump is communicated with an aerobic tank; the water outlet of the nozzle is communicated with the inner chamber of the aeration tank, and the inner chamber of the aeration tank is formed byan upper atomization area and a lower high-oxygen water area; the outlet of the oxygen generator is communicated with the atomization zone; and a return tube is arranged at the lower part the sidewall of the aeration tank, one end of the return tube is communicated with the high-oxygen water area, and the other end of the return tube is communicated with the lower part of the sidewall of the aerobic tank. The strong positive pressure spray aeration system has the advantages of simple and complete structure, low price, wide aeration range, and uniform and rapid distribution of dissolved oxygen.

The present invention provides a method for systematically controlling rapid proliferation of cyanobacteria cells in lakes in spring. The method applies physical, biological and chemical methods in an integrated and synergistic manner and includes using flexible enclosures to close a control water area and using modified soil to adsorb and settle algal cells; coupling four technologies including algae control by fish, algae control by biological floating islands, algae inhibition by plants and algae control by microorganisms; and using H₂O₂ to kill algae and using 40% FeCl₃+CaCO₃ and 50% Ca(NO₃)₂ to treat sediment. The method of the present invention has established a complete system for physical, chemical and biological control of algae, forms joint control of exogenous contaminants, endogenous contaminants and cyanobacteria, integrates physical, biological and chemical methods and optimizes systematic methods that are used synergistically.

The invention discloses an environment-friendly aeration device for chemical sewage treatment; the device comprises an aeration pipe and a conveying pipe, the upper end of the aeration pipe is fixedlyconnected with a fixed pipe, the upper end of the fixed pipe is connected with the conveying pipe through a rotating part, and the inner wall of the conveying pipe is fixedly connected with a first fixed rod; a second fixing rod is fixedly connected to the inner wall of the fixed pipe, a rotating rod is rotatably connected to the bottom of the first fixing rod, and the lower end of the rotating rod is fixedly connected with the upper end of the second fixing rod. The aeration device is reasonable in structure, aerators distributed in the cross shape are arranged, and the aerators distributedin the cross shape slowly rotate when gas is conveyed, so that comprehensive aeration treatment of an aeration tank can be realized, the number of the aerators is greatly reduced, meanwhile, the possibility that holes of the aerators are blocked is also reduced, and the aerators are also convenient to mount and dismount; The operation is simple, convenient and fast, the labor amount of workers isgreatly reduced, and convenience is brought to the workers.

The invention relates to a refuse treatment equipment, specifically to a refuse leachate ammonia nitrogen handling arrangement based on membrane bioreactor. The provided refuse leachate ammonia nitrogen handling arrangement based on membrane bioreactor is provided with a reaction tank, a supporting plate, a composite membrane-cloth bag component, cloth water pipe, cloth gas tube, a mud discharging chamber and a mud valve, wherein, the supporting plate is located below the reaction tank, the composite membrane-cloth bag component is located on the supporting plate, the composite membrane-cloth bag component is provided with a non-woven cloth bag and a guide plate, the non-woven bag is stuffed with oyster shell particles, diaphragms are provided respectively on both sides of the non-woven cloth bag, the guide plate is arranged at the outside of the diaphragm; the cloth gas tube is located above the supporting plate and below the supporting plate, the cloth gas tube is connected to an aerator which loads air in the cloth gas tube; the cloth water pipe is located below the supporting plate, and the cloth water pipe is in external connection to a water inlet pipe; the mud valve is located at the bottom of the mud discharging chamber.

An air floatation sewage treatment device based on superoxide nano micro-bubbles comprises a wastewater tank, a dosing storage tank and an air floatation tank, the wastewater tank and the dosing storage tank are communicated with the air floatation tank through a mixing pipeline, and a water inlet pump and a nano microbubble generating device are further arranged on the mixing pipeline; the interior of the air floatation tank is divided into a release area, a sedimentation area and a water outlet area, the release area and the sedimentation area are separated by a first flow guide plate, the sedimentation area and the water outlet area are separated through a second flow guide plate, and a water outlet is formed in the bottom of the water outlet area; the sedimentation area is internally further provided with a slag discharging pond which is used for separating the sedimentation area from the upper part of the sedimentation area, the top of the sedimentation area is provided with a slag floating machine used for scraping floating slag at the upper part of the sedimentation area into the slag discharging pond, a slag discharging hole is formed in the bottom of the slag discharging pond, and a plurality of second sludge discharging hoppers which are sequentially arranged are arranged at the bottom of the sedimentation area. The device is reasonable in design, the generated micro-bubbles are small in diameter and long in retention time in water, particles in water can be effectively adhered and separated, and the sewage treatment effect is good.

The present invention discloses a composite rinsing-free water treatment system and an application method thereof. The system mainly comprises a first water pump, a second water pump, a timing automatic switch, a sealing bin and a gas pump, wherein one ends of the water pumps are communicated with sewage to be treated, the other ends are connected with the sealing bin, the gas pump is connected with the sealing bin, and the timing automatic switch automatically switches the working states of the first water pump and the second water pump. According to the present invention, the sewage enters the bin, and impurities and pollutants in the water are effectively eliminated through the filtration and the decomposition with probiotics so as to purify the water; the process does not use disinfectants, additives and the like so as not to cause secondary pollution; the water is constantly filtered and purified during the circulation so as to achieve the best water and labor saving effect without the replacement; the system can set the equipment scale according to the amount of the sewage to be treated, such that the advantages of flexibility and convenience are provided; and the system can be widely used in the fields of aquariums, ecological fish bowls, aquaculture, landscape water bodies and the like, and has good application prospects.

The invention relates to the technical field of chromium-containing wastewater treatment, in particular to a method for treating chromium in tanning dyeing and finishing wastewater. The method for treating chromium in tanning dyeing and finishing wastewater comprises the steps of (a) mixing pretreated dyeing and finishing wastewater with an induction reagent, and carrying out an induction reaction; and (b) adjusting the pH value of the material subjected to the induced reaction to be alkaline, and carrying out precipitation treatment, wherein the induction reagent comprises soluble metal salt. In the treatment method, the pretreated dyeing and finishing wastewater is mixed with the induction reagent, under the action of the induction reagent, a small quantity of residual neutral chromium complex in the wastewater is converted into a positive chromium complex, the charge property of complex-state chromium is changed, then the pH is adjusted, precipitation is carried out, chromium is removed, and the removal effect on chromium in the wastewater is greatly improved.

The invention relates to a method and a system for semi-closely processing medical sewage. The method comprises the following steps: (1) wet type grinding; (2) sterilization by a chlorine method; (3) removal of residue disinfectant; (4) primary sedimentation; (5) aerobic bio-chemical processing of activated sludge; (6) secondary sedimentation, wherein the steps of (1) and (2) and the transfer of the sewage from the step (1) to the step (2) are carried out in a closed state. The system comprises wet type grinding equipment, a sterilization pond, a disinfectant removing pond, a primary sedimentation pond, an activated sludge pond and a secondary sedimentation pond, which are connected in sequence, wherein the wet type grinding equipment, the sterilization pond, and a sewage transfer device between the wet type grinding equipment and the sterilization pond all adopt the closed structure. The method and the system have the advantages of the realization of microorganism safety, unsusceptible occurrence of spreading risk of pathogenic microorganisms, relatively less investment, and convenient operation and maintenance.

The invention discloses an ecological floating island considering flood control and drainage of urban medium and small river channels and landscape requirements, the ecological floating island comprises a plurality of floating island units which are mutually connected and fixed, and each floating island unit comprises a floating island plate, a planting basket, a curtain type aeration membrane assembly, a microbial filler ball and an aeration pipeline system; buoys are fixed on the periphery of the floating island plate through tension bands; a planting hole is formed in the middle of the floating island plate, a planting basket is embedded in the planting hole, the planting basket is filled with a plant growth substrate, and aquatic plants are planted in the planting basket; a plurality of curtain type aeration membrane assemblies are fixedly mounted at the bottom of the floating island plate; and a microbial filler ball assembly is suspended at the bottom of the floating island plate. The method has the technical effects and advantages that impact pollution caused by urban rainwater runoff to a receiving water body is reduced, and water resources are effectively supplemented. The pollutant purification effect is good, and the removal efficiency of main pollutants in initial rainwater is high. Operation is free of maintenance, power consumption is low, oxygen utilization rate is high, and therefore comprehensive engineering investment is low.

A system is provided for withdrawing permeate from a substrate. The exemplary system includes a vessel having a wall configured to contain substrate, a compartment positioned adjacent the wall of the vessel and configured to receive substrate from the vessel, and a filter positioned at least partially within the compartment and configured to separate permeate from substrate during operation of the filter. The compartment is configured to contain cleaning solution and substantially prevent cleaning solution from contacting substrate in the vessel during cleaning of the filter.

The invention discloses an achromobacter sp. for degrading lignin and application of the achromobacter sp. in lignin-containing wastewater treatment, and relates to the technical field of industrial wastewater treatment. The achromobacter sp. CCZU-WJ6 for degrading lignin is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number of the achromobacter sp. is CGMCC NO.19017. The strain can be applied to degradation of industrial lignin-containing wastewater, and particularly, when the lignin-containing wastewater is degraded, the applicable degradation culture conditions are as follows: the temperature is 20-40 DEG C, the pH value is 4-9, and the concentration of treated lignin is greatly reduced. Compared with the traditional method, thestrain and the application method of the strain have the advantages of high treatment efficiency, wide application range, simple operation, low equipment requirement and obviously reduced operation cost, and solve the problems of complex procedure and carbon source requirement in fungus treatment of industrial lignin-containing wastewater.

The invention discloses an expressway service area sewage treatment device and a treatment method thereof. The expressway service area sewage treatment device comprises a hydrolysis acidification tank, a 1# anoxic tank, a 1# aerobic tank, a 2# anoxic tank, a 2# aerobic tank, a biochemical sedimentation tank, a coagulation tank, a flocculation tank and a physicochemical sedimentation tank, wherein enzyme floating fillers are arranged in the hydrolysis acidification pool, the 1# anoxic pool and the 2# anoxic pool, and the special structural form of the fillers and the pool body structure enable sewage to be fully mixed without stirring; an enzyme floating filler is arranged in the 2# aerobic tank, and different treatment states are formed in the area by adjusting the aeration rate, so that the sewage treatment efficiency is improved; and suspended filler is arranged in the 1# aerobic tank, and the filling ratio can be adjusted according to the water quality condition, so that the device is suitable for various water quality changes. The system adapts to the characteristic of large change of water quality and water quantity in the expressway service area, and is simple and compact in structure, high in automation degree, flexible in operation mode adjustment, high in organic matter and total nitrogen removal efficiency and low in operation and maintenance cost.

The invention relates to the technical field of sewage treatment, and discloses a gallery type aeration tank, the left side and the right side of a horizontal screen are respectively connected to the left side wall and the right side wall of a tank body, the bottom of an inlet end screen and the bottom of an outlet end screen are respectively connected to the front end and the rear end of the horizontal screen, and the horizontal screen is separated from the bottom wall of the tank body; the two sides of the inlet end screen and the two sides of the outlet end screen are connected with the left side wall and the right side wall of the tank body, the horizontal screen, the inlet end screen, the outlet end screen and the left side wall and the right side wall of the pool body define a filler cavity provided with suspended filler, aeration discs are evenly distributed on the bottom wall of the pool body, and a first perforated pipe network is arranged on the front side of the inlet end screen. A second perforated pipe network is arranged on the rear side of the outlet end screen; the liquid inlet end of a reflux device is arranged at the rear end of the filler cavity, and the liquid outlet end of the reflux device is arranged at the front end of the filler cavity; with the adoption of the equipment, the oxygen utilization rate can be increased, the water treatment effect and treatment capacity are enhanced, and blockage caused by a fluidized suspended filler is effectively prevented.

The invention discloses a breeding bay scallop artificial accumulated temperature maturity promoting method. On the basis of artificial accumulated temperature maturity promotion production practice of breeding bay scallop, method improvement and technology improvement are performed on the previous process flow, the processes of effective breeding bay scallop temperature accumulation, bait compositions, a feeding mode, small quantity of water changing, EM bacterium putting and the like are adjusted, and the brood amount, the fertilized egg hatching rate and the larvae metamosphsis rate of thebreeding bay scallop are remarkably increased. By adopting the breeding bay scallop artificial accumulated temperature maturity promoting method, the effect of the reproductive performance of the breeding bay scallop can be improved, and the manpower and material source costs in the maturity promoting period of the breeding bay scallop can be greatly lowered. By applying the breeding bay scallop artificial accumulated temperature maturity promoting method to efficient seed production and large-scale seeding production of the bay scallop, the defects in the artificial accumulated temperature maturity promotion process of the bay scallop at the present stage can be made up, and high and stable yield of the bay scallop is realized. A standard, low-cost, green and efficient new breeding bay scallop artificial accumulated temperature maturity promoting method is established, and reliable technical means are provided for efficient seed production and factory artificial seedling of the bay scallop.