1117results 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.

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.

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 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 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.

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.

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 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.

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.

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.