1125results about "Treatment with microorganism supports/carriers" patented technology

A new biofilm-activated sludge Sequencing Batch Reactor (SBR) treatment process for sewage or wastewater has successfully been developed as the third generation SBR (SBR3). This new SBR3 process utilizes a multi-stage and multi-sludge SBR configuration receiving either continuous or intermittent inflow of wastewater. Each stage has individually controlled continuous or alternating anaerobic / anoxic / aerobic operation, with or without mixing and recycling from the other stage(s). The configuration and operation is dependent upon the treatment objectives and effluent discharge requirements. In the preferred embodiment, carriers are used to facilitate control of operating conditions.

The invention discloses a natural pyrrhotite biological filter and a method for synchronously removing nitrate nitrogen and phosphorus out of water by using the natural pyrrhotite biological filter, which belongs to the field of advanced wastewater treatment. The method comprises the following steps: (1) preparing and constructing biological filter fillers; (2) starting the biological filter; and (3) operating the biological filter. Pyrrhotite is used as an electron donor of sulfur autotrophic denitrification bacteria to reduce nitrate in the water to nitrogen so as to remove nitrate nitrogen out of the water; and the pyrrhotite and an oxidative product of the pyrrhotite remove phosphorus in such manners as adsorption and chemical precipitation so as to synchronously remove nitrate nitrogen and phosphorus out of the water. The biological filter disclosed by the invention is simple to construct, convenient to start, stable to operate, high in nitrogen and phosphorus removal efficiency and free of auxiliary materials, and the biological filter is applied to advanced wastewater treatment.

An aerated biological filtration system (10) for treating waste water includes a treatment vessel (11) of elongated configuration which incorporates a circulating filter bed (23) and a static filter bed (24). The circulating filter bed incorporate a particulate material such as granulated activated carbon having a specific gravity in the range of 1.2 to 1.4 and effective size of 0.6 mm to 1.5 mm. The circulating filter bed is disposed above the static filter bed and an aeration system (27) is disposed between the filter beds. The aeration system is arranged to diffuse air through the circulating bed either continuously or intermittently so as to provide oxygen to micro-organisms attaching to the particulate material and to cause slow circulation of that particulate material. The system has particular application for domestic recycling of grey water.

A method and apparatus for treating contaminated water are described wherein contaminated natural water or industrial wastewater is treated to remove contaminants in a packaged modular treatment unit.

The present invention provides a system and method for treating wastewater in which the majority of solids and biological oxygen demand compounds are separated from the wastewater feed using a primary separation process, to produce a solids phase and a water phase. The solids phase is irradiated to reduce the level of pathogens such that it is safe to use as a soil substitute and / or additive so that the solids can thus be disposed of in an environmentally-friendly manner. In additional embodiments, the solids that have been disinfected by radiation are mixed with a suitable inert filler material to produce a soil substitute, fertilizer, compost, or other soil additive. The liquid phase is treated in a substantially smaller system than would be required for treating the full-strength wastewater that can include a suspended media biological regeneration reactor system. The liquid treatment system can include a high flux adsorbent material treatment system integrated with a low flux adsorbent material biological regeneration reactor.

There is provided a process for purification treatment of wastewater containing an organic substance. There is provided a process for purification treatment of wastewater containing an organic substance by carrying out supercritical treatment or subcritical treatment, which comprises subjecting the wastewater to at least one solid-liquid separation pretreatment selected from separation treatment with a flocculant, sedimentation treatment, flotation treatment and filtration treatment; and then subjecting the wastewater to primary treatment as biological treatment; and subsequently purifying the wastewater by treatment including secondary treatment as supercritical treatment or subcritical treatment.

Disclosed in the present invention are a lake reservoir water environment pollution restoration, comprising an ecological floating bed floating on the surface of lake reservoir water, a plurality of planting beds arranged on the ecological floating bed, a plurality of adsorption nets and reaction beds fixed at the bottom of the ecological floating bed, and a plurality of algae grilles and aeration pipes arranged at the bottom of lake reservoir water, the aeration pipes being connected with an air pump through a vent pipe, a plurality of aeration holes being arranged on the aeration pipes, at least one inflation bag being fixed on the algae grilles, the at least one inflation bag being connected with an air delivery pipe through an inflation pipe, and the input end of the inflation pipe being connected with a second output end of the air pump. The lake reservoir water environment pollution restoration system can achieve all-directional multi-level restoration of water bodies in lake reservoirs, as well as water-surface, in-water and water-bottom multi-level purification, with high restoration efficiency and convenience in maintenance.

The invention relates to a biological carbon modular composite vertical-flow artificial wetland system which comprises a wetland bed body, a water inlet tank, a gravel layer, a modular biological carbon layer, a mixed filler layer, a filtering medium layer, wetland plants, a reflux unit and a water distributor. When the wetland operates, influent water passes through the anoxic gravel layer and biological carbon layer, the aerobic mixed filler layer, and the anoxic biological carbon layer and filtering medium layer. The reflux unit is arranged inside, and pollutants in sewage are removed under the filtration-adsorption-precipitation action, microbial conversion action and plant absorption action. The biological carbon modular composite vertical-flow artificial wetland system has the advantages of blockage prevention, high hydraulic load, favorable nitrogen / phosphorus removal effect, stable operation and the like.

The invention discloses a hydrophilic carrier for microbial biofilm formation. The hydrophilic carrier comprises a hollow short tube, and a first concentric ring and a second concentric ring which are sequentially concentrically arranged outside the hollow short tube, wherein the surface of the outermost second concentric ring is toothed; and the microbial filler is composed of the following components in parts by weight: high-density polyethylene, low-density polyethylene, white lime, Dow powder activated carbon, light calcium carbonate, maleic anhydride, dicumyl peroxide, gelatin, chitin, ferroferric oxide magnetic powder and manganese-zinc ferrite. The density of the microbial filler is 0.96-0.98 g / cm<3>. The hydrophilic carrier for microbial biofilm formation prolongs the contact time between microbes and organic matters, so that the organic matters are degraded quickly and thoroughly; and the biological oxidation can restore the surface adsorption capacity of the activated carbon.

The invention provides a device and a method for treatment of low-temperature and low-carbon ammonia nitrogen wastewater on the basis of solid-phase denitrification and heterotrophic nitrification-aerobic denitrification. The device comprises a reactor and a reflux system, wherein the upper part and lower part of the reactor are respectively provided with a fluidized bed aerobic zone and a filterpool anoxic zone which are filled with a solid carbon source filling material and separated by a porous water distribution plate; an aeration tube is arranged on the water distribution plate and connected with an aeration device through a gas flowmeter; the lower end of the reactor is provided with a water inlet; the upper end of the reactor is provided with a water outlet; an effluent of the reactor enters a secondary sedimentation tank, and an effluent of the secondary sedimentation tank enters an intermediate water storage tank through an overflowing opening; the upstream end of the refluxsystem communicates with an effluent of the intermediate water storage tank; the downstream end of the reflux system communicates with the reflux opening of the lower end of the reactor through a liquid flowmeter; and the interior of the fluidized bed aerobic zone is provided with a dissolved oxygen monitor and a nitrate concentration monitor. The device and the method provided by the invention can still realize highly-efficient removal of ammonia nitrogen and total nitrogen under the conditions of low temperature and low carbon.

Provided are an apparatus and a method for waste water treatment not generating excessive sludge, for which down-sized tanks are usable. The apparatus comprises an aeration tank where waste water to be treated is kept in contact with carrier particles in an aerobic condition, and a complete oxidation tank. In this, the liquid in the complete oxidation tank is filtered through a separation membrane and the resulting filtrate is discharged out of the system. The s-BOD sludge load to the complete oxidation tank is preferably at most 0.1 kg-BOD / kg-MLSS.day.

The invention discloses a method for accelerating aerobic sludge granulation by the aid of charcoal. The method includes that pyridine degradation bacteria Rhizobium sp. NJUST18 and ordinary activated sludge are used as compound inocula for the aerobic granular sludge, the charcoal is used as a crystal nucleus for the aerobic granular sludge in a sequencing batch reactor form, and quick forming of the pyridine degradation aerobic granular sludge can be promoted. The method has the advantages that the aerobic granular sludge with a pyridine degradation function can grow by the aid of pyridine which is a unique carbon source and a unique nitrogen source, granules have regular shapes and are good in sedimentation after the cultivated granular sludge is mature, reaction systems are high in sludge concentration, the high-concentration pyridine can be degraded and is subjected to synchronous nitrosation, and the cultivation time of the aerobic granular sludge for treating wastewater difficult to biodegrade can be effectively shortened.

The invention relates to a preparing method and application of ecological matrix particles for river water body enhanced nitrogen removal. The problems that C / N of a river water body is low, a carbon source capable of being used by microorganisms is insufficient, the denitrification effect is inhibited, and the TN removal rate is small can be effectively solved. Corncob powder is smashed, added into a sodium hydroxide solution to be soaked, dried, irradiated by ultraviolet light to obtain modified corncob; a high-permeability porous inorganic material, an inorganic binder and the modified corncob are stirred to be mixed uniformly and pelleted; the prepared spherical particles are laid on a flat plate, placed in a shady and cool place, cured, and sprayed with water in the morning and evening every day until particle surfaces are moist, curing is completed, and the ecological matrix particles can be obtained through airing. The ecological matrix particles can be used as matrix filler in riverway in-situ / heterotopias recovery technology of an ecological floating bed, an ecological filtering dam, an ecological percolation island, an ecological revetment, a constructed wetland, an ecological filter tank, an ecological filter bed and the like. The ecological matrix particles are rich in raw material, easy to produce and prepare, low in cost, good in use effect, long in service life, huge in economic and social benefit.

The invention discloses an activated carbon fiber modification method, a water treatment filter device and an application of the water treatment filter device, and belongs to the field of water treatment and filler. Firstly, carbon fiber precursors are pretreated by deionized water, immersed by a salpeter solution with ammonium dihydrogen phosphate and then dried and sintered, and modified active carbon fiber is obtained. The specific surface area and surface oxygen-containing groups of the activated carbon fiber are increased, the microorganism affinity is enhanced, the film formation speed and the film formation amount of water treatment filler obtained on basis of the activated carbon fiber are remarkably increased, dissolved and suspended pollutants in water can be better absorbed, the water treatment filler device can be used for sewage treatment engineering such as treatment of organic dye wastewater, wastewater of a pharmaceutical factory, papermaking wastewater and the like as well as purification of domestic wastewater, raw water of a water factory and the like, and the advantages that the method is simple and easy to implement, the water treatment filler has a simple structure, the design is reasonable, and manufacture is easy are achieved.

The invention discloses a method capable of being used for rain water seepage-filtering, collection and storage and purification in a sponge city.The method comprises the steps of firstly, selecting an appropriate position, excavating a foundation pit of a biological detention pond and water storage wells, and laying open vertical-rim stone strips 5-10 cm away from the two sides of the road surface of the biological detention pond.The biological detention pond comprises a rubble cover layer, a vegetation planting soil layer, a charcoal filler layer and a gravel drainage layer in sequence from top to bottom, and seepage-proof films are laid at the periphery and the bottom of the biological detention pond.An overflow pipe is laid on the gravel drainage layer, an overflow port in the upper end is 5-10 cm higher than the rubble cover layer, and the lower end is connected with a municipal drainage pipe network.The system can be applied to the places such as a residential area, a campus, a parking lot, a park and a road, rainwater can be collected and stored, the content of pollutants such as nitrogen, phosphorus and heavy metal in the rainwater can be reduced, the recycling purpose is achieved, finally, urban inland inundation is effectively alleviated, and rainwater utilization efficiency is improved.

A novel biologically active water treatment system for removing contaminant from industrial effluent and method thereof is provided. A novel upflow bioreactor system having an expanded bed configuration and method for creating an expanded bed for release of gas without release of substantial precipitate is also provided. A novel downflow bioreactor system having an automated degas and backwash system is also provided.

An apparatus and a method for removing nitrogen and phosphorus from sewage by using sponge iron and activated sludge are disclosed herein. The apparatus comprises a raw tank, a pH adjusting tank, a primary SBBR reactor, a secondary SBBR reactor, an intermediate tank, and a discharge tank; by modification of sponge iron, preparation of composite filler, sludge inoculation and domestication, and sewage treatment, an effect of simultaneous denitrification and dephosphorization is achieved in one reactor using the combined action of sponge iron and activated sludge with high nitrogen and phosphorus removal efficiency.

The invention discloses a water quality improvement agent for aquaculture and a preparation method thereof. The water quality improvement agent is prepared from the following raw materials in percentage by weight: 5 percent to 10 percent of lactobacillus, 5 percent to 10 percent of photosynthetic bacteria, 5 percent to 10 percent of bacillus, 5 percent to 10 percent of brown sugar, 10 percent to 20 percent of activated carbon, 25 percent to 35 percent of zeolite powder, 3 percent to 5 percent of citric acid, 2 percent to 5 percent of sodium bicarbonate and 10 percent to 15 percent of calcium peroxide. According to the water quality improvement agent disclosed by the invention, organic matters in a water body of water for the aquaculture can be reduced, and the content of ammonia-nitrogen and nitrite is greatly reduced; the chemical oxygen consumption of pond bottom sludge is improved and oxygen debt of the pond bottom is alleviated; growth and proliferation of beneficial microorganismsand decomposition of organic pollutants are accelerated and the circulation of pond substances is accelerated; the proliferation of beneficial algae in a pond is accelerated so that the pond dissolved oxygen is increased; a culture water region environment is improved, healthy growth of aquatic animals is promoted, the feed coefficient is reduced and the economic benefits are increased.

The invention relates to a method for increasing biogas production of thermophilic anaerobe systems. More closely, a biomass containing a consortium comprising polymer-degrading, acetogenic and methanogenic microorganisms is inoculated with a microorganism culture before the start of or during biogas production. Said microorganism is a thermophilic, acetogenic, hydrogen producing bacterium. As an example, Caldicellulosiruptor saccharolyticus is applied. According to the invention production if methane containing biogas is significantly increased.The invention is useful for intensifying biogas production and thereby increasing its feasibility.

The present invention provides systems and methods for in-situ remediation of soil and groundwater having contaminants such as but not limited to organic compounds perhaps providing adsorption, chemical oxidation, and even biodegradation of contaminants with novel treatments such as but not limited to mixtures of granular activated carbon, calcium peroxide, sodium persulfate, and nitrate perhaps in various concentrations.

A three-dimensional (3D) model OB, a plane of projection PL, a light source L and a reference viewpoint O are defined in a virtual space on a computer. When a line of sight LC for tracing from the reference viewpoint O to the 3D model OB and to the light source L is determined, the view point is corrected to be shifted from the reference viewpoint O by a displacement VD for each projection pixel PP, to obtain a proper line of sight LC. Accordingly, a computer-graphics image as thus rendered can be provided to be composited with a picture taken from life by a camera, thereby generating a composite image having a natural impression.

The invention provides a ceramic filler for wastewater treatment, a production method for the ceramic filler and a wastewater treatment device. Through adoption of the ceramic filler for the wastewater treatment, problems that the improvement of the nitrogen and phosphorus removal efficiency is difficult, the sludge amount is large and the follow-up sludge treatment cost is high, which are caused by low carbon source utilization rate of conventional spherical light ceramic particles, are solved. The ceramic filler comprises a ceramic particle base body in which micro-holes communicated with the outer side are distributed, and is characterized in that carbon sources are filled in the micro-holes; the outer periphery of the ceramic particle base body is coated with a coating used for sealing the carbon sources in the micro-holes. In addition, the invention further provides the production method for the filler and the wastewater treatment device employing the filler.

The invention specifically relates to a mixed nutritional type denitrifying biological filler and a preparation and application thereof. The mixed nutritional type denitrifying biological filler adopts the technical principle that activated carbon, sulfur and solid carbon source are used as raw materials to prepare the denitrifying biological filler, and the denitrifying biological filler and anionic clay are mixed and loaded into an applicable reactor; the filter simultaneously has the heterotrophism and autrophism denitrifying effects, so that the problem of secondary pollution caused by adding of liquid carbon sources is effectively solved, and the production of sulfur autrophism byproducts is flexibly controlled.

A low concentration wastewater treatment system is provided that includes a high flux adsorbent material treatment system integrated with a low flux adsorbent material biological regeneration reactor. The high flux adsorbent material treatment system includes one or more unit operations for mixing low concentration wastewater with adsorbent material that is fresh, recycled, or a combination of both, and for decanting a liquid effluent having a reduced level of contaminants. The adsorbent material with adsorbed contaminants is regenerated in a low flux adsorbent material biological regeneration reactor in which a biological reaction occurs, such as biological oxidation, wherein organic contaminants in the wastewater are metabolized generally into carbon dioxide and water. Excess biomass is removed from the adsorbent material, and the thus-regenerated adsorbent material is recycled to the high flux adsorbent material treatment system.

The invention belongs to the field of biotreatment of wastewater or sewage, and particularly relates to an improved A<2>O and sulphur autotrophy joint nitrogen and phosphorus removal reactor and a sewage treatment method. The reactor comprises an improved A<2>O process section and a sulphur autotrophy process section, wherein the improved A<2>O process section comprises a pre-anoxic zone, an anaerobic zone, an anoxic zone, an aerobic zone and a secondary sedimentation tank. The nitrogen removal efficiency of the reactor reaches more than 95% due to the combination of heterotrophism-autotrophicdenitrification, and the reactor is better adaptive to the low-carbon nitrogen ratio municipal sewage. In addition, the proportion of step-feed water entering the anaerobic zone is properly increasedto guarantee the biological phosphorus removal effect.

Disclosed is a water de-contamination system, methods, and apparatus using alternating aerobic, anaerobic, and aerobic conditions, with carbon and other waste processing treatments, to remove contaminants from water. Included is an aerobic system in flow communication with an outlet from a waste tank; waste processing treatments in flow communication with liquid exiting the aerobic system and in which anaerobic conditions can be created; means for creating and maintaining anaerobic conditions either within the waste processing treatments or after fluid exits the waste processing treatments; means for return of the fluid into aerobic conditions. A fluid retaining device within which anaerobic conditions are maintained and nitrogen-containing compounds and other contaminants are processed and removed is used. Waste processing treatments are provided within or adjacent the fluid retaining device. Included are outflow means for fluid to exit the fluid retaining device and enter aerobic conditions for final processing and release.

This invention is to the removal of organics and nutrients from wastewater. More specifically, the invention addresses the removal of nutrients such as nitrogen and / or phosphorus from wastewater and has specific adaptations that can be of added benefit in small systems including septic tanks, cluster wastewater systems, and other small treatment plants. The invention can also be used for larger treatment works and for sidestream treatment systems. The invention also has adaptations that can be used to treat wastewater in low gravity and other difficult environments. The invention also has adaptations to permit rapid startup, to induce dormancy, and to preserve organisms for extended periods of time.

The invention discloses a combined multi-level ecological unit system for deeply treating secondary effluent of a sewage plant. The system sequentially consists of a water distribution tank, an ecological pond, a secondary constructed wetland and a submerged plant pond. When the system runs, tail water of a sewage treatment plant sequentially passes through the ecological pond, a subsurface flow wetland, a surface flow wetland and the submerged plant pond, and is purified under the joint action of a filler-microorganism-plant system, and effluent is high in water quality and stable. The system has the advantages of capability of efficiently removing nitrogen and phosphorus, low capital construction cost, no power consumption, convenience for subsequent maintenance and operation and the like, and has a landscaping value, and the aim of deeply treating the effluent can be fulfilled.

The invention discloses a simultaneous phosphorus and nitrogen removal light material, a preparation method and the application thereof, and belongs to the technical field of environment function materials and sewage disposal. A fusion mixture is obtained by sufficiently fusing and dispersing sulfur and an iron-based component, wherein the iron-based component is a pyrite and calcium magnesium carbonate mixture; and foaming treatment is carried out on the fusion mixture to form the simultaneous phosphorus and nitrogen removal light material. The simultaneous phosphorus and nitrogen removal light material disclosed by the invention has the characteristics of high porosity, large specific surface area, light weight and high reaction activity. The obtained light material, as a microbial carrier and an electron donor of biochemical reactions, is applied to the reactors, such as fixed beds and fluidized beds, for sewage disposal, and has the advantages of good microorganism adhesion property, high denitrification speed and good phosphorous removal effect.