228results about How to "Improve water quality" patented technology

The invention discloses an integrated advanced water treatment method by ultrafiltration membrane coagulation/ adsorption/biological reactor and a device thereof. In the invention,, in which the coagulation, the adsorption and biological reaction is combined and completed in a same reaction cell. Raw water enters the ultrafiltration membrane coagulation/ adsorption/biological reactor; activated sludge microorganism in the reactor biologically degrades ammonia nitrogen and organic matters with low molecular weight in the water; a coagulant-adsorbent adding system adds coagulant and adsorbent in the reactor to remove the organic matters with medium and high molecular weight and phosphorus; at last, the immersion ultrafiltration membrane components arranged in the reactor carries out the solid-liquid separation to prepare drinking water with excellent quality.A perforated aeration pipe is arranged on the lower part of the reacted to be connected with a sludge discharge pip to discharge the residual sludge in the reactor regularly. In order to ensure the membrane flux, a membrane reverse washing system carries out the reverse washing for the ultrafiltration membrane components regularly.The invention combines the coagulation effect, the absorption effect as well as the biological effect and ultrafiltration physical interception effect together so that the manufacturing cost and operation cost are remarkably reduced, while the invention is a novel process with the advantages of high efficiency, energy saving, convenient maintenance and management of advanced purification of the drinking water.

In accordance with at least selected embodiments of the present invention, an improved liquid degassing membrane contactor or module includes a high pressure housing and at least one degassing cartridge therein. It may be preferred that the high pressure housing is a standard, ASME certified, reverse osmosis (RO) or water purification pressure housing or vessel (made of, for example, polypropylene, polycarbonate, stainless steel, corrosion resistant filament wound fiberglass reinforced epoxy tubing, with pressure ratings of, for example, 150, 250, 300, 400, or 600 psi, and with, for example 4 or 6 ports, and an end cap at each end) and that the degassing cartridge is a self-contained, hollow-fiber membrane cartridge adapted to fit in the RO high pressure housing.

The invention relates to a high efficiency water body bottom material modifier, which is prepared by processing potassium peroxymonosulfate complex, urea hydrogen peroxide, ion chelating agent and carrier; and each component has the mass percent of: 0.5%-50% potassium peroxymonosulfate complex, 0.5%-50% urea hydrogen peroxide, 0.5%-10% ion chelating agent and 5%-50% carrier and each component prepares into tablet, round particle, anomal particle or pulvis finished product by processing. The composition of the invention can efficiently process aquaculture pond, lake, landscape water, swimming pool and other bottom environments in order to reach stable and lasting water quality improvement purpose. The potassium peroxymonosulfate complex in the composition can oxidize bottom oxygen consuming organic matter to prevent from acidifying and smelliness; the urea hydrogen peroxide can increase water body bottom dissolved oxygen and reduce water body soil bottom oxygen debt; the ion chelating agent can exchange copper, zinc, iron and other heavy metals in the adsorbed water body to reduce the toxicity to aquatic animals; the above three compounds after processing into the finished products can directly put into the water bottom to have significant integral improvement effect on water body bottom and be especially suitable for water body cultivation.

A pre-fabricated, self-contained biological fluidized bed apparatus for the treatment of wastewater, which offers easy and uniform expansion for various types of commercially available media, by means of a conical bottom and a single, non-clogging flow distribution pipe. Besides the biological treatment accomplished within the fluidized bed, this reactor provides mechanical solids/gas/liquid separation and upflow sludge blanket clarification to improve effluent quality. Additional unique features of this apparatus are a rotating surface skimmer and an excess sludge collection and thickening device powered by an externally mounted drive. With this reactor configuration, anaerobic and anoxic biological treatment and subsequent clarification are achieved in a single enclosed tank.

The invention discloses an integrated water treatment method of ultrafiltration membrane coagulation/ biological reactor and a device thereof. The invention, the coagulation, and the biological reaction is combined and completed in a same reaction cell. Raw water enters the ultrafiltration membrane coagulation/ biological reactor; activated sludge microorganism in the reactor biologically degrades ammonia nitrogen and organic matters with low molecular weight in the water; a coagulant adding system adds coagulant and adsorbent in the reactor to remove the organic matters with high molecular weight and phosphorus; at last, the immersion ultrafiltration membrane components arranged in the reactor carries out the solid-liquid separation to prepare drinking water with excellent quality. A perforated aeration pipe is arranged on the lower part of the reactor to be connected with a sludge discharge pip to discharge the residual sludge in the reactor regularly. In order to ensure the membrane flux, a membrane reverse washing system carries out the reverse washing for the ultrafiltration membrane components regularly. The invention combines the coagulation effect and the biological effect with the ultrafiltration physical interception effect so that the manufacturing cost and the operation cost are remarkably reduced, while the invention is a novel advanced purification process of the drinking water with the advantages of high efficiency, energy saving, convenient maintenance and management.

The invention relates to a microbe dredging agent. A porous zeolite is employed as a carrier; and mixed bacteria of actinomycetes, nitrosomonas eutropha, nitrobacter winogradskyi, paracoccus pantotrophus and bacillus megaterium, in a certain proportion, are used as dredging bacteria. The five specific dredging bacteria form a ''cell family'', which, through mutual conversion metabolism, not only can play a role of water purification in an oxygen-rich water area, but also can play a role of biological decomposition and conversion in a low-oxygen even anoxic environment (e.g. water-bed mud) andsalty water area (e.g. gulf), so as to purify sewage and improve water quality. The invention employs a porous zeolite with a high absorptivity as a fixed carrier of the dredging bacteria, so that the dredging bacteria are more firmly fixed and not easily flushed by water; because the zeolite is apt to sinking, the microbe dredging agent of the invention is especially suitable for water-bed dredging of river and lake, etc. In addition, the preparation method of the microbe dredging agent of the invention has mild conditions, a simple technology and advantages of low production costs and benefit for popularization and application.

A process for treating the oil contained sewage in oil field includes such steps as adding demulsifier (linear low-molecular cationic ammine polymer with multiple hydroxy groups), demulsifying, and adding flocculant (cationic polymer whose principal component is aminomethyl polyacrylamide).

The invention relates to a process method for recycling precious metal from electroplating wastewater. Wastewater is placed into a collecting basin, then a hoisting device is utilized to hoist the wastewater to the next process, and the process method is characterized by also including the following steps: electroplating wastewater pre-treatment, namely the electroplating wastewater sequentially passes through a quartz sand filter, an active carbon filter and a filter element type filter to remove impurities, and filtration is subject to the next process; membrane concentration, namely the filtration obtained in the previous step is added into a membrane bioreactor for carry out step by step concentration separation, permeate is collected to a permeate water tank and is used as water for poaching in electroplating production line; concentrated solution enters into a concentrated solution water tank and is recycled in a plating tank, or electrolysis is carried out to recycle nickel. The invention has the advantages that: sewage discharge of the traditional electroplating industry can be reduced, harmful heavy metal in wastewater can be recycled, thus reducing environmental pollution; and water treatment is low in cost, and economic benefit is considerable.

The invention discloses an underwater aerating device based on river power decontamination, which comprises an air cylinder and a floating drum. A piston is installed in the air cylinder; a main shaft and a gear train transmission system are installed in the floating drum; a water flow driving device is connected with the part of the main shaft, which extends out off the floating drum; the water flow driving device is used for driving the main shaft to rotate when water flow flows; the main shaft is connected with the gear train transmission system; the gear train transmission system is connected with the piston through a crankshaft connecting rod transmission system and drives the piston to do front-and-rear reciprocating motion; air inlets and air outlets are respectively formed at front and rear ends of the air cylinder; one-way valves in corresponding directions are respectively installed on the air inlets and the air outlets; each air inlet communicates with the atmosphere; each air outlet is connected with an exhaust pipe; and an aerator is connected with the other end of the exhaust pipe. The underwater aerating device adopts river power to perform aeration on the water body, does not need to consume external electric energy, and can effectively save energy and reduce noise.

The invention belongs to the field of sewage treatment, and discloses a sewage purification system. The sewage purification system comprises a watercourse, wherein the watercourse is at least 1000 meters long, at least 3 meters wide and 1-4 meters deep. An emerging plant area, a water-planted commercial crop area and a submerged plant area are planted along the watercourse in the flow direction of the sewage, wherein the emerging plant can be cane shoot or lotus root; the water-planted commercial crop can be water-planted cress, leaf lettuce, lettuce, water convolvulus, ryegrass or the like in spring and summer, or water-planted green vegetable, shallot or the like in autumn and winter; the sunken plant can be waterweed, Potamogeton crispus L or eel grass; and at least 100kg of spiral shells and at least 100kg of freshwater mussels are stocked in the watercourse. By planting the emerging plant area, the water-planted commercial crop area and the submerged plant area in the watercourse of the sewage treatment system and simultaneously stocking the spiral shells and the freshwater mussel filter-feeding benthic species, the invention intensifies the wetland ecosystem restoration function, can effectively improve the water quality, is especially applicable to the purification of rural domestic sewage, and can be used as the matching technology for new countryside construction.

Disclosed are a microbial particle preparation for aquacultural water quality purification and a preparation method. The preparation is characterized by including utilizing zeolite as a core after steps of activation of bacillus subtilis by strains, seed liquid preparation, fermenting culturing, concentrating and the like, and then wrapping the bacillus subtilis outside the zeolite by a bacterium absorption medium to prepare gray white irregular particles with a structure of an inner layer and an outer layer. The microbial particle preparation is low in production cost, easy to store and transport and widely applicable to water quality purification of fresh water and sea water and contains more than or equal to 2X1010/g of live bacterium counts. The microbial particle preparation can be quickly sunk to water bottom after being thrown into water, the bacillus subtilises can be massively bred in water and function in water purification together with the zeolite, organic substances such as residual baits and corrosive substances can be disintegrated quickly, and water quality can be further purified by means of nitrate and nitrite in the water, diseases of bred animals can be reduced while quality and output can be improved. Further, the microbial particle preparation is simple to prepare, low in cost, stable in preparation method and convenient to produce industrially, can be stored at room temperature without refrigerating and has excellent social benefits and economic benefits.

The invention discloses a method for treating waste water from citric acid-production, which belongs to the technical field of waste water treatment and particularly relates to a method for treating waste water from citric acid-production, which is simple in operation and good in treatment effect and ensures the effluent can be discharged out directly. The invention adopts a technical scheme that:the method adopts a two-phase anaerobic and aerobic combined process that waste water generated in production process enters a settling and adjusting tank and floataion tank from a gird tank to remove suspended matters, colloid matters and other pollutants from water; before entering a two-phase anaerobic reactor, sewage is diluted by clean water in a ratio of 1:1 and then quantitatively pumped into the two-phase anaerobic reactor to decompose and transform various complex organic matters in the waste water into micromolecular organic matters, methanes, carbon dioxides and other materials; nitrified waste water enters a delayed aeration tank to interact with aerobe in the sludge to remove residual organic matters; and part of suspended matters brought out by water settle in inclined-tubesedimentation tank and then the waste water reaching standards is discharged.

The invention discloses a method for breading shrimp postlarvae by biomanipulation. The method comprises the following steps of: selecting the parent shrimp without virus WSSV and TSV, and feeding the parent shrimp with bait without virus WSSV and TSV, wherein the feeding amount per day is 4 to 6 percent of the weight and the parent shrimp is fed for four times; breading the parent shrimp under the conditions that the water temperature is between 26 and 30 DEG C, the salinity is 2.8 to 3.2 percent and the illumination intensity is 100 to 1,000 lx to make the parent shrimp reach sexual maturity; after mating, putting the female shrimp into a spawning pond to make female shrimp lay eggs, and washing and sterilizing the collected fertilized ovum; incubating the fertilized ovum into the nauplius under the conditions that the water temperature is between 28 and 31 DEG C, the salinity is 2 to 3 percent, the pH value is 7.8 to 8.6, dissolved oxygen is 6 to 10mg/l after 13 to 18 hours, putting the nauplius into a nursing pond which is used for culturing seedlings and treated by the water, wherein the density of the nauplius is 200-300 thousand/m<3>; in the late-mid period of the nauplius growing, introducing chaetoceros muelleri without virus according to the concentration of 5*104cell/ml, and when breading nauplius the into the zoea, introducing bacillus subtilis according to the concentration of 1.25*104cfu/ml; and after the shrimp is bred to 0.8 to 1cm, obtaining the seedlings. The whole breading process is subjected to regular PCR detection, and no specific pathogen WSSV and TSV is ensured in the whole breading process. The method has the advantages of no specific virus, rapid growth, high disease resistance, high stress resistance, short breeding period, large and uniform growing standard, high yield, good investment benefit and the like.

The invention relates to an integrated water-saving device, mainly comprising a box-shaped platform surface, supporting legs, a split flow water-discharge valve, a centralized control water nozzle, a purifying sleeve, a water-collecting bin, a pressure-limiting water pump and a connecting water pipe, wherein the box-shaped platform surface and the supporting legs form a cabinet-type washing platform; the split flow water-discharge valve and the centralized control water nozzle collect water used in a washing pond selectively; the purifying sleeve, the water-collecting bin and the pressure-limiting water pump filter and purify the collected water and then the water is stored in the box-shaped platform surface; and the box-shaped platform surface uses the pressure in a box body to convey water to places such as a water closet, a mop pond and a flower-watering tap and the like with low requirement to water quality. Therefore, the integrated water-saving device has flexible installation and convenient operation, does not occupy the washing space, and can achieve the purpose of saving water utilization conveniently.

The invention discloses an environment-friendly water purifier, preparation and using methods thereof. The water purifier is prepared by mixing a flocculating agent, a metal-chelator and microbes; under the combined action of the three ingredients, the purification effect of a water body can be strengthened, the water body quality can be remarkably improved, the water body becomes clear, odor can be eliminated, the hardness of the water quality can be reduced, the dissolved oxygen can be increased, the contents of ammonia nitrogen and nitrate nitrogen of the water body can be reduced, heavy metal ions can be reduced, pathogenic bacteria can be reduced, suspended matters and harmful algae in the water can be reduced, diseases of aquatic animals and plants can be reduced, degradation of pollutants in the water can be accelerated, and the aquatic ecological development is healthy and sound. The water purifier does not contain aluminum, iron, chlorine, heavy metal ions or other harmful substances, is safe, environment-friendly and healthy, has a remarkable effect of purifying sewage in the agriculture, animal, husbandry and fishery industries, domestic sewage and industrial sewage, and is of important meaning for environmental protection and human health protection.

The invention belongs to the field of breeding, and particularly relates to a crab breeding method. In the crab breeding process, fish fries are placed to serve as bait of crabs so that stocking density of the crabs can be large, and meanwhile the fish fries can serve as bait in the crab growing process. Fishes captured by the crabs in a pond are increased while artificial feed is provided for the crabs, moving time of the crabs is prolonged, the health conditions of the crabs are improved, the survival rate in the breeding process is increased, and meat quality of the crabs is also improved.

The invention discloses a method for processing aquaculture wastewater containing antibiotics by utilizing a plant floating bed, belonging to the field of wastewater pollution treatment. The method comprises the following steps: 1) plant pre-culture: cleaning Italian rye grass, utilizing pre-configured aquaculture wastewater to acclimate and culture for 7-10 days in a laboratory, thus enabling the Italian rye grass to adapt to wastewater; and 2) wastewater treatment: adding prepared aquaculture wastewater containing antibiotics into a cuboid container slot, transplanting the Italian rye grass after acclimation and culturing to a floating bed carrier, placing the floating bed on the surface of aquaculture wastewater, and staying for 20-35 days. The invention not only can take away a great amount of nitrogen and phosphorus nutrients from aquaculture wastewater, thus inhibiting algae growth, improving water quality, and simultaneously realizing the purpose of directly discharging or recycling aquaculture wastewater. The harvested rye grass also can be used as livestock and poultry feed or used for centralized recycling treatment, and recovery of usable nutrient elements in plant body.

The invention discloses an electric kettle with an automatically opening and closing lid based on rate of water temperature change, comprising a kettle body, an automatically opening and closing lid mechanism, a single chip microcomputer, an electronic switch, a power supply and a temperature sensor. The kettle body comprises a lid and a heating resistor. The single chip microcomputer comprises a temperature acquisition module, a boiling judging module and a control module. Boiling state of the water in the kettle is judged by the boiling judging module based on the rate of water temperature change. If the water is judged as in the boiling state by the boiling judging module, the lid will be opened by the automatically opening and closing lid mechanism controlled by the control module. After a preset period of time, the electronic switch is turned off and the lid is closed by the automatically opening and closing lid mechanism controlled by the control module. The invention proposes an effective method to judge the boiling state of water in an electric kettle. And by use of the automatically opening and closing lid mechanism, the lid is opened automatically after boiling and the water is kept heated for a preset period of time and then the lid is closed automatically. In this way, hazardous substance in water is fully volatilized and water quality is improved.

The invention discloses a method for advanced treatment and reuse of printing and dyeing wastewater pre-processed by macroporous resin. The method comprises the following steps: taking the printing and dyeing wastewater for the secondary treatment; performing conducting Fenton reaction precipitation, ultra-filtrate membrane filtration, macroporous resin absorption and reverse osmosis membrane separation on discharged wastewater subjected to the treatment, wherein the output water of the reverse osmosis membrane is adopted as the high-quality water for recycling for enterprises, and the concentrated water of the reverse osmosis membrane is emitted on standard, or is emitted to a sewage plant through nano tubes for centralized processing. The method has the advantages that (1) the regular pre-processing technology and multi-media filtration procedure before the macroporous resin is eliminated, and the investment and operation cost is reduced; (2) the ultra-filtrate membrane filtration is adopted as the pre-processing of the macroporous resin, the input water quality is improved, pollutants, such as suspended solids, in water are greatly reduced, the service life and the regeneration period are prolonged, and the operation cost is lowered; (3) the macroporous resin absorption is added as the pre-processing of the reverse osmosis membrane on the basis of the ultra-filtration, the input water quality of the reverse osmosis membrane is improved, pollution is relieved, the service life and the cleaning period are prolonged, and the water output of the reverse osmosis membrane is improved.

The invention discloses a synthesis treatment method for eutrophic water area, which comprises following steps: a. clearing the floater on water composed of algae water bloom by machine to take away mass algae particle and eliminate content of nitrogen and phosphor; b. using water-flow construction device to drive and promote water flow and destroy the over breeding of algae; c. cultivating biomembrane with microbe carriers in water to degradate pollutant.

The invention discloses a method for removing silicon dioxide in water. The method mainly comprises the following steps: (1) adding alkali for pretreatment to colloidize silicon dioxide, calcium and magnesium impurities in water; (2) electro-flocculation reaction precipitation: using an aluminum plate, an iron plate or an aluminum-iron mixed plate as a positive plate for electrolysis to generate an aluminum hydroxide or ferric hydroxide flocculant, after adsorption and alkali treatment, forming silica and calcium, and the magnesium impurities colloid particles, and performing co-deposition; 3)air flotation and impurity removal: floating waste water processed in the step 2) to remove impurities, and removing silica particles and other impurities which are difficult to precipitate in the water; and 4) membrane filtration: filtering the waste water processed by the step 3) by a membrane filtration apparatus, and realizing deep filtering treatment on the silica impurities in water. The whole process removes silicon dioxide thoroughly and maturely, and the process design is reasonable and coherent, also effectively removes calcium and magnesium impurities in the water, improves the quality of the processed clear water, and improves the recovery and application value of the processed water, has strong resistance to shock loading, and has good industrial application prospects.

The invention discloses an intelligent fish tank. The intelligent fish tank comprises an intelligent fish tank main body and a bottom filter device, wherein the bottom filter device is arranged at the bottom of the intelligent fish tank main body and comprises a tank body, a filter device and a water pump, a fault alarm, a control system and a storage battery are arranged at one side of the tank body, the storage battery is used as an emergency power supply of the intelligent fish tank, the filter device comprises filtering areas separated by a plurality of separating plates, and the filtering areas are a water storage area, a physical filtering area I, a physical filtering area II, a biochemical filtering area I, a biochemical filtering area II and a clear water area sequentially and are sequentially communicated. The intelligent fish tank has the advantages that water does not need to be changed manually due to the structural design, full-day 24h unintermittent purification on water in the intelligent fish tank main body can be realized, water quality is improved, breeding environment is purified, water resource is greatly saved, energy conservation and environmental protection are realized, aesthetic property is good, intelligent control of the intelligent fish tank is realized, and safety and practicability are high.

The invention relates to a composite alga retaining enclosure for floating plants, comprising inner enclosures, outer enclosures and a floating plant community within the enclosed space by the inner enclosures and the outer enclosures. The inner enclosures and the outer enclosures are fixed on inner enclosure fixing piles and outer enclosure fixing piles embedded in bottom mud respectively; the inner enclosures and the outer enclosures are arranged in parallel according to the distance of twice the wave length, each of the outer enclosures comprises a flexible large-aperture nylon meshy hanging slice with the aperture of 50mm, each of the inner enclosures comprises a flexible small-aperture engineering non-woven geotextile hanging slice with the aperture of 50 meshes, the top ends are 1.5m above higher than the high water level. The floating plant community is preferably activated broken branches of alternanthera philoxeroides, and the input density is 20Kg per square meter. The composite alga retaining enclosure for floating plants has the functions of floating island wave decaying, floating plant alga trapping and water purification through the inner enclosures, the outer enclosures and the floating plant community therein, and can reduce the alga biomass at a water intake when being used for retaining alga in water head site; and the water quality of the water head site is improved.

The invention discloses a rainwater-collection recycling system and a construction method thereof. The rainwater-collection recycling system comprises a control system, an initial-rainwater flow dividing well, a water storage pool, a first lifting well, a filtering disinfecting chamber, a clean water pool and a second lifting well, wherein the initial-rainwater flow dividing well, the water storage pool, the first lifting well, the filtering disinfecting chamber, the clean water pool and the second lifting well are sequentially communicated. The first lifting well is communicated with the bottom of the water storage pool and arranged in the water storage pool, and the second lifting well is communicated with the bottom of the clean water pool, arranged in the clean water pool and connected with a recycling point pipe; a stopping weir is arranged in the initial-rainwater flow dividing well, a flow discarding groove is formed in the lower portion of the stopping weir, a rainwater feeding pipe is arranged on the side wall of a water distribution area, the height of the rainwater feeding pipe and the height of the pipe bottom of a first water discharging pipe are larger than or equal to the height of the groove top of the flow discarding groove, and the pipe bottom of an overflowing pipe is flush with the groove bottom of the flow discarding groove; a plurality of back washing pipes are laid on the bottom of the water storage pool, the outer surface of the water storage pool and the outer surface of the clean water pool are sequentially covered with an anti-seepage film layer preventing water seepage and a geotechnical cloth layer from inside to outside, construction and maintenance are convenient, and the recycled rainwater quality is high.

The invention relates to a method for performing nitrogen biological removal on low-temperature low-carbon nitrogen ratio sewage. A device with anoxia ponds and aerobic ponds which are distributed alternatively, arrayed continuously and are communicated with one another, sewage raw water respectively flows into each anoxia pond, outlet water of the tail end aerobic ponds respectively flows back to each anoxia ponds, and biological membrane modules are arranged in each aerobic pond to maintain biomass of activated sludge. Compared with the prior art, the nitration efficiency in the aerobic section is effectively improved by the method through optimizing the raw water to inlet water ratio and equinox backflow ratio in second-stage anoxia-aerobic process, the biomass of activated sludge is maintained by using the biological membrane modules, on one hand, the outlet water quality is improved under normal work conditions, and on the other hand, high-efficient nitration under low-temperature condition is realized. The COD value, the ammonia nitrogen content and total nitrogen level of the outlet water are lower in average, and the first level A standard can be reached under a low-temperature low- carbon nitrogen ratio condition.

The invention relates to a domestic sewage treatment device which comprises eight relatively independent reaction units of an anaerobic tank, a facultative tank, a primary aerobic fluidization tank, asecondary aerobic fluidization tank, an aerobic illumination phycomycete symbiosis fluidization tank, a primary aerobic ecological tank, a secondary aerobic ecological tank and an ecological sedimentation tank, wherein the eight reaction units are in serial connection. Or some reaction unit except the ecological sedimentation tank can be repeatedly arranged according to need to be in serial connection to form a reactor more than eight levels. The sewage treatment device disclosed by the technical scheme of the invention has a biological-ecological synergistic technical effect in effectively treating and reusing domestic sewage on site.

The invention discloses a low concentration coal chemical industrial wastewater processing system. The system which comprises an anoxic tank, a jet aeration system, a microorganism-fixed bioreactor (MFB reactor) and a secondary sedimentation tank is characterized in that: low concentration coal chemical industrial wastewater goes through a barrier, flows out of an equalizing tank, flows into the anoxic tank, then flows out of the anoxic tank and enters the MFB reactor, the MFB reactor which adopts an advanced aeration mode of air blast jet increase and an enzymatic suspension filler in a patent has the advantages of low energy consumption, high oxygen utilization efficiency and small occupied area, and the low concentration coal chemical industrial wastewater which flows out of the MFB reactor enters the secondary sedimentation tank and then is discharged after standards are reached. The system of the invention, which allows problems of high energy consumption, complex operation program and the like existing in routine SBR systems and MBR systems to be successfully solved and has the advantages of strong operation stability, low investment cost, high processing efficiency and low operation cost, is a low concentration coal chemical industrial wastewater processing method with development potential.

The invention is an ecological method of controlling nitrite in fish and shrimp pool, fixing helpful microbe particles on discarded crop stalks, then throwing these stalks in the bottom of the pool, so that the helpful microbes grow and breed by using surplus waste nitrogen in the pool and additional carbon source so as to eliminate harmful nitrite and amino nitrogen; simultaneously decomposes organic matters in bottom mud, and the helpful microbes themselves can act as the source of monocell protein of fishes and shrimps. It can not only implement resource utilization of the discarded matters but also promote ecological balance, implementing healthy breeding.

The deep treatment process of metallurgical sewage includes the following steps: 1. collecting sewage and producing intermediate water; 2. treating intermediate water with lime milk and powdered active carbon to lower COD and high valent ion content; 3. ultrafiltering treatment to reach SDI lower than 3; and 4. reverse osmosis and desalting treatment. The treatment with lime milk and powdered active carbon before reverse osmosis can lower COD of water to ensure the normal operation of the reverse osmosis system and reduce the time number of chemical water of the reverse osmosis system. The present invention has low investment and low power consumption.

The invention relates to a bamboo charcoal pottery clay water purification inner-container and a preparation method thereof. The bamboo charcoal pottery clay water purification inner-container comprises 48-52wt% of bamboo charcoal particles, 8-12wt% of bamboo charcoal micro-powder, 8-12wt% of Chinese medical stone, 4-6wt% of quartz powder and 23-28wt% of raw ore Yixing clay. The preparation method comprises the following steps of 1, mixing the above raw materials and water according to the above ratio to obtain slurry, 2, preparing an inner-container blank from the slurry by a mold and carrying out drying at a temperature less than 100 DEG C, and 3, carrying out sintering molding on the dried inner-container blank by a totally-enclosed electric furnace. The bamboo charcoal pottery clay water purification inner-container can purify household tap water and the purified tap water can be directly drunk.