36results about How to "Efficient phosphorus removal" patented technology

An improved process of one-stage treatment of city sewage is characterized by that on the basis of biologic-chemical adsorption and flocculation method, the deposited mud is separated and activated by aeration and the activated mud is used for reflux, adsorption and flocculation, so greatly removing COD, ammoniacal nitrogen and SS, and saving chemical flocculant. Its advantages are high effect and low cost.

The invention discloses a solar ecological floating island and a water ecological restoration method, and belongs to the field of water treatment. The solar ecological floating island comprises a solar photovoltaic panel, a solar support, a solar distribution box, a storage battery, a solar controller, a solar inverter, a time controller, a power socket, an air compressor, an over-water floating platform, aquatic plants, artificial floating islands, hollow flower dishes, flower baskets, built-in plastic foams, fishing nets, biological carbon fiber water treatment fillers, aeration sand heads, silica gel soft pipes and ceramic particles, and the floating island is divided into an over-water portion, a water surface portion and an underwater portion. Electric energy is provided by the aid of a solar power supply system, automatic aeration can be achieved without external contamination, so that reoxygenation of water bodies is achieved, aerobic environments are provided for the underwater biological carbon fiber water treatment fillers, organic pollutants in polluted water bodies can be effectively reduced, nitrogen and phosphorus are removed, inhabiting and breeding places are provided for biology in the water bodies, diversities of water-body biology are richened, and in-situ restoration of the water bodies is achieved.

The invention discloses an automatic medicine adding control method and a device for chemically-assisted dephosphorization in sewage treatment. A total-phosphorus on-line monitor and an iron-ion on-line monitor are used for respectively sampling and monitoring the middle position of the aerobic zone of a biological reaction tank of a sewage treatment plant and the water outlet of a secondary sedimentation tank; the total phosphorus concentration of a water sample on the middle position of the aerobic zone of the biological reaction tank and the iron-ion concentration in a water sample on the water outlet of a secondary sedimentation tank are collected; meanwhile, the water inlet flow of the biological reaction tank is monitored by a flowmeter; according to the total phosphorus concentration of the water sample on the middle position of the aerobic zone of the biological reaction tank and the water inlet flow of the biological reaction tank, the medicine adding amount is determined; and meanwhile, the medicine adding amount is rectified by the total phosphorus concentration calculated by the iron-ion concentration in the water sample on the water outlet of the secondary sedimentation tank. The medicine adding amount determined by the invention is more economic and reasonable, the effluent total phosphorus of a sewage treatment plant is feasibly guaranteed to reach the standard,the effluent stability is improved, the effluent water quality stability is guaranteed, and the resistance to impact load of the chemical synchronous dephosphorization technology is enhanced.

The invention discloses a happy farmhouse wastewater treatment device and method. The device comprises an oil separation settling pond, a facultative tank, an aerobic biofilm unit and an ecological filter which are arranged in sequence; the happy farmhouse wastewater passes through the oil separation settling pond, the facultative tank, the aerobic biofilm unit and the ecological filter in sequence, and then is discharged out from the ecological filter. The device and the method, provided by the invention aim at high concentrated organic wastewater containing rich plant fiber, starch, sugar, protein, vitamin, animal fat and the like, such as happy farmhouse restaurant wastewater, connecting the processes of 'oil separation settling', 'facultative biofilm treatment', 'aerobic biofilm treatment', and 'ecological filter' in series sequentially in a separation manner, and purifying and treating agriculture product processing wastewater containing a large amount of grease and high concentrated ammonia nitrogen and total phosphorus, and the happy farmhouse restaurant wastewater.

The invention relates to a preparation method of a composite phosphorus removing agent for sewage treatment. The composite phosphorus removing agent is prepared from a reagent A and a reagent B. A preparation method of the reagent A comprises the following steps of putting Fe2(SO4)3 solids and AlCl3.6H2O with the mass ratio being (2.5 to 1.1)-(1.0 to 2.5) in a reactor, and adding water in the reactor with the mass ratio of the water and a mixture in the reactor being (2 to 1)-(5 to 1) to enable the mixture to be dissolved to obtain ferric sulfate-aluminium chloride liquid; and sequentially adding a certain quantities of sodium hypochlorite, sodium chlorate and potassium permanganate, and performing uniform mixing. A preparation method of the reagent B comprises the following step of dissolving one or more of polyacrylamide and poly-dimethyl-diallyl-ammonium chloride into water to prepare 0.05-1 percent solution. The composite phosphorus removing agent prepared by the preparation methodhas the characteristics of good phosphorus removal effect, both removal of COD and SS and the like, can be widely used for the fields of black and odorous water body treatment, industrial wastewatertreatment, domestic sewage deep treatment and the like, is simple to operate and is suitable for popularization.

The invention relates to efficient phosphorus-removing saccharomyces and application thereof in domestic sewage treatment and belongs to the field of environmental microbiology. The saccharomyces strain is named Candida rugosa BL3 and belongs to Candida rugosa, bacterial colonies are in a light yellow waxy shape and linked by milk white filaments in the middle, and single colonies are milk white round, 2-3 mm, smooth and waxy on surface, not transparent, viscous and easy to prick up, have a strong wine aroma and can form round ascospores, pseudohypha and fungal hypha. The strain has an efficient phosphorus-removing function, requires no strict control on the dissolved oxygen environment, still has no phosphorus release phenomenon after being cultured for 60 h, and can be applied to biological sewage treatment processes. The strain has the optimum pH value range of 5-7 and growth temperature of 20-35 DEG C and adopts a mixed source of glucose and sodium acetate as the best carbon source. Actual domestic sewage treatment finds that the strain has the removal rate of phosphorus in sewage being 84.9%, the removal rate of ammonia nitrogen being 39.5% and the removal rate of COD being 78.3% under an aerobic condition at the pH value of 5 and at the temperature of 25 DEG C.

Belonging to the field of environmental pollution control, the invention provides an adsorbent for anion and cation adsorption and a preparation method thereof. Specifically, the preparation method includes the steps of: adding a lanthanum salt into a weakly acidic magnetite solution, and adding alkali to adjust the magnetite solution to alkaline, mixing the substances evenly, then conducting washing with water to neutral, and the carrying out dehydration, calcination and grinding. The adsorbent has a core-shell structure, and comprises a magnetic composite material and lanthanum hydroxide loaded to the composite material. The composite material includes ferrihydrite coated magnetite. The adsorbent provided by the invention has high efficiency adsorption capacity on anions and cations, also is low in preparation cost, and is easy for separation. The preparation method provided by the invention is simple and has low energy consumption, the prepared sample is magnetic and is easy to separate, at the same time, the preparation process is a liquid phase reaction process, has no need for harmful reagent, and is easy for large-scale preparation. And the adsorbent has wide application prospects in the field of pollution control.

The invention provides an integrated nitrogen and phosphorus removal sewage treatment device, which is mainly characterized in that an anaerobic reaction chamber is located at the front end of a hypoxia reaction chamber; a stirrer is arranged in the anaerobic reaction chamber; a water inlet pipe is arranged in the anaerobic reaction chamber and the hypoxia reaction chamber; the water inlet pipe is provided with a hypoxia reaction chamber valve and an anaerobic reaction chamber valve; the hypoxia reaction chamber valve is connected with the water inlet pipe of the hypoxia reaction chamber; the anaerobic reaction chamber valve is connected with the water inlet pipe of the anaerobic reaction chamber; a sludge return pipe of the anaerobic reaction chamber is located at the side faces of the lower parts of the hypoxia reaction chamber and the anaerobic reaction chamber; the sludge return pipe of the anaerobic reaction chamber is provided with a sludge return valve, and the sludge return valve is used for controlling sludge return flow rate. The integrated nitrogen and phosphorus removal sewage treatment device has the advantages that sludge returns to the anaerobic reaction chamber from the hypoxia reaction chamber, thus, an environment in favor of phosphorus-accumulating bacteria and anaerobic phosphorus release is created, and the biological selection of the phosphorus-accumulating bacteria is enhanced, therefore the high-efficiency phosphorus removal is realized; the integrated nitrogen and phosphorus removal sewage treatment device is low in operating cost, and can be widely applied to sewage treatment in medium-and small-sized cities and towns and countries, and highway service areas.

The invention relates to a high phosphorus content polluted river water treatment method and relates to the technical field of river water phosphorus removal. According to the high phosphorus contentpolluted river water treatment method, a riverway soil layer and a bottom frame are specifically utilized, a liquid preparation barrel is arranged above the riverway soil layer, a motor frame is welded to the edge of the upper end of the liquid preparation barrel, a motor is arranged in the motor frame, one end of a transmission shaft is connected to the lower part of the motor, the other end of the transmission shaft is connected with a rotating rod, one end of a through liquid pipe is arranged on an inner wall of the liquid preparation barrel, and a fixed screw penetrates through the insideof the bottom frame. The high phosphorus content polluted river water treatment method disclosed by the invention has the beneficial effects that five liquid discharging pipelines are arranged, so that the liquid discharging pipelines can simultaneously perform high-efficiency phosphorus removal on five areas of river water, and a phosphorus removal agent can be conveniently diffused in the riverwater; thus, the speed of the device for removing excessive phosphorus elements in the river water is improved; the device is provided with a concentration detector, so that the concentration of the phosphorus removal agent can be detected in real time, high-concentration phosphorus removal agents are prevented from being directly injected into river water, and the situation that river water quality becomes bad is avoided.

The invention provides modified biochar as well as a preparation method and application thereof, and relates to the technical field of adsorption materials. The preparation method of the modified biochar provided by the invention comprises the following steps: under an air isolation condition, performing first calcination on agricultural wastes to obtain a biochar base material; carrying out secondary calcination on the Ca source-containing waste, and mixing with water to obtain Ca (OH) 2 suspension; and placing the biochar base material in the Ca (OH) 2 suspension, and dipping to obtain the modified biochar. According to the prepared modified biochar, under the initial pH acidic condition, Ca (OH) 2 on the surface is preferentially subjected to an acid-base neutralization reaction with H < + > in a solution, the modified biochar and phosphate are subjected to chemical precipitation under the slightly alkaline condition, and compared with other Ca-loaded biochar, the adsorption capacity is improved by 3-15 times.

The invention discloses a domestic sewage treatment agent capable of efficiently removing phosphorus and a preparation method thereof, and relates to the technical field of sewage treatment. The domestic sewage treatment agent capable of efficiently removing phosphorus comprises the following components in parts by weight: 10-40 parts of modified WTR sodium alginate beads, 30-90 parts of a flocculating agent, 3-20 parts of a chelating agent, 3-10 parts of ferrous sulfate, 1-3 parts of citric acid and 3-10 parts of reduced iron powder. Through salt modification and roasting, the modified WTR has a phosphorus adsorption rate of 70% or above; the prepared modified WTR sodium alginate beads can be desorbed through a NaOH solution, and have good reusability; and the domestic sewage treatment agent applying the modified WTR sodium alginate beads has a phosphorus adsorption rate of 95% or above.

The invention discloses a farming wastewater phosphorous biochemical removal process. The farming wastewater phosphorous biochemical removal process comprises the following processes of 1) feeding farming wastewater into an anaerobic pond for anaerobic treatment; 2) enabling the effluent of the anaerobic pond to automatically flow into an anaerobic precipitation pond for natural precipitation to obtain anoxic sludge and supernatant, returning a part of the anoxic sludge to the anaerobic pond and discharging the other part of the anoxic sludge for phosphorous removal; 3) enabling the supernatant of the anaerobic precipitation pond to automatically flow into an aerobic pond for aerobic treatment; 4) returning a part of the effluent of the aerobic pond to the anaerobic pond, enabling the other part of the effluent of the aerobic pond to automatically flow into an aerobic precipitation pond for natural precipitation to obtain aerobic sludge and supernatant, returning a part of the aerobicsludge to the aerobic pond, discharging the other part of the aerobic sludge for phosphorous removal, and performing subsequent treatment on the supernatant. The farming wastewater phosphorous biochemical removal process can make full use of the phosphorous removing effects of the sludge of an anaerobic section and the sludge of an aerobic section to achieve efficient phosphorous removal, avoid affecting the denitrification effects of nitrifying bacteria and be low in processing cost.