The invention discloses a forward osmosis membrane and MF (microfiltration) membrane coupling anaerobic sewage treatment method, and belongs to the technical field of sewage treatment. For municipal sewage, the method comprises the following steps: causing raw water to enter an anaerobic reaction area through a water feed pump, and collecting generated biogas for reuse after the biogas passes through a water seal; for part of sewage, implementing separation and purification under the action of a forward osmosis membrane, and then implementing reuse by treatment with a reverse osmosis membrane; for the other part of sewage, implementing separation and purification by virtue of an MF membrane, then recycling phosphate by virtue of a sedimentation tank, and finally implementing up-to-standard effluent discharge or reuse by virtue of an activated carbon adsorption column. According to the method, forward osmosis membrane and MF membrane technologies and an anaerobic digestion technology are coupled into a sewage treatment process, so that effluent is guaranteed to stably meet reclaimed water reuse requirements, and a smaller area is occupied; organic matters in the sewage are recycled in form of biogas; the phosphate in the sewage is recycled; salinity accumulation of forward osmosis is relieved, and membrane pollution is effectively controlled; the whole system can be automatically controlled.

Forward osmosis membrane and MF (microfiltration) membrane coupling anaerobic sewage treatment method

The invention discloses a ternary sewage treatment method coupling anaerobic acidogenesis, FO (Forward Osmosis) and an MFC (Microbial Fuel Cell), and belongs to the technical field of sewage treatment. The method disclosed by the invention comprises the following steps: pumping sewage into an anaerobic acidogenesis zone, mixing the sewage and NaOH solution, enabling the mixed solution to enter the MFC, converting enriched organic matters into bioelectricity, and then refluxing the mixed solution to the anaerobic acidogenesis zone. One part of the mixed solution penetrates through an MF (Microfiltration) membrane component to form outlet water, enters a chemical settling pond to remove phosphate, and then passes through an activated carbon adsorption column; the other part of the mixed solution penetrates through an FO (Forward Osmosis) membrane component to obtain outlet water, and then enters an RO (Reverse Osmosis) system for treating to obtain high-quality recycled water. According to the method, an FO technology and an MFC technology are newly coupled, and finally a ternary combination process which couples the anaerobic acidogenesis, the FO and the MFC is finally constructed; the conversion from the sewage to organic acid and the accumulation of the organic acid are realized under anaerobic acidogenesis and FO interception effects; the electricity generation performance of the MFC is improved; the recycling of the recycled water is realized by utilizing FO and RO; finally, the recycling and electricity generation of the sewage are realized synchronously.

Ternary sewage treatment method coupling anaerobic acidogenesis, FO (Forward Osmosis) and MFC (Microbial Fuel Cell)

The invention provides an integrated electrochemical forward osmosis reactor for removing new organic pollutants in sewage, belonging to the technical field of waste water treatment in environment engineering. According to the integrated electrochemical forward osmosis reactor, an electrochemical electrolysis electrode is coupled to one side of a feed solution pool of a forward osmosis reaction pool, a stainless steel mesh cathode and a titanium mesh iridium-tantalum-tin coated activity layer anode are respectively arranged in the middle of the feed solution pool and a position of the pool wall away from a forward osmosis film, and all components are sealed through a silica gel washer bed. The integrated electrochemical forward osmosis reactor can be used as a deep treatment device behind a secondary treatment unit of an urban sewage treatment plant, the interception of new organic pollutants in secondary effluent water and the degradation of pollutants in concentrated liquor can be synchronously completed, and the problem of subsequent treatment of the forward osmosis concentrated liquor can be solved. In addition, the effluent water of the integrated electrochemical forward osmosis reactor can be recycled. The integrated electrochemical forward osmosis reactor has important significance on promotion of water ecology health and drinking water safety, and remitting the problem of fresh water resource shortage.

Integrated electrochemical forward osmosis reactor for removing new organic pollutants in sewage

The invention relates to a device and method for recovering nitrogen and phosphorus in wastewater by a conductive positive permeation process, and belongs to the field of wastewater recycling. The device consists of a raw material liquid unit, a conductive positive permeation membrane unit and a suction liquid unit. The invention also provides a method for recovering the nitrogen and phosphorus inthe wastewater by the device; a MgCl2 solution is used as suction liquid; nitrogen and phosphorus containing wastewater is used as raw material liquid; a weak electric field is exerted on a conductive positive permeation membrane; the wastewater is concentrated by the conductive positive permeation process; nitrogen and phosphorus in the wastewater are recovered by a struvite chemical precipitation method. The method has the advantages that the flux of magnesium ions in the positive permeation process is increased; the utilization rate of magnesium salt and the wastewater concentration efficiency are improved; the nitrogen and phosphorus recovery rate is improved; the use time of the positive permeation membrane can be prolonged; good economic and environmental effects are achieved. The device has the advantages that the structure is simple; the stability is high; the treatment efficiency is high; the flow process is simple; the equipment is compact; the occupied area is small; the automatic control is easily realized; the operation management is simple.

Device and method for recovering nitrogen and phosphorus in wastewater by conductive positive permeation process

Sewage is driven into the anaerobic acidification device for mixture with the NaOH solution The mixed liquid enters into the MFC for converting the enriched organics to bioelectricity and then flows back to the anaerobic acidification device A part of the mixed liquid passes through the MF membrane module to form effluent and enters into the sedimentation basin for phosphate removal and finally passes through activated carbon adsorption column, another part passes through the FO membrane module to form effluent and obtain high quality recycled water after the RO membrane processing The method is a new coupled model of FO membrane and MFC and it provide a ternary combined technique integrating MFCs with anaerobic acidification and FO membrane The change and accumulation of sewage to organic acids are achieved under anaerobic acid production and FO retention, the electricity generation performance of MFC is improved, and the reuse of reclaimed water is realized by separating of FO and RO membranes Finally, the wastewater reuse and electricity generation are realized synchronously

A ternary sewage treatment method integrating microbial fuel cells with anaerobic acidification and forward osmosis membrane

The invention belongs to the field of water and waste water treatment and especially relates to a method of reducing salinity accumulation in forward osmosis membrane-bioreactor by extracting soluble salts via a micro-filtration membrane. The method is realized by placing the micro-filtration membrane with a single water outlet system and a conductivity controller into a reactor, and implementing in-site extraction of soluble salts in the reactor by controlling the water yield of the micro-filtration membrane so as to maintain the salinity in the forward osmosis membrane-bioreactor stable and improve the running flux of the forward osmosis membrane-bioreactor. The method is realized without need of structural improvement on the former forward osmosis membrane-bioreactor but addition of the micro-filtration membrane; the method is wide in the application scope and can be applied to the forward osmosis membrane-bioreactor for treating the waste water and also micro-polluted water, and is convenient for operation and management and easy for promotion and application.

Method of reducing salinity accumulation in forward osmosis membrane-bioreactor

The invention discloses a device for evaluating performance of a forward osmosis membrane. The device comprises a raw material liquid tank, a feed liquid pool, a forward osmosis membrane component, a draw solution pool, a high-concentration salt pond and a delivery tank, wherein a check valve and an overflow pipe are arranged on an overflow tank of the pool; an aeration pipe is arranged at the bottom; the forward osmosis membrane component comprises a shell; a forward osmosis membrane is arranged inside the shell, and divides the shell into upper and lower lattices, which respectively are a draw solution chamber and a feed liquid chamber; the draw solution chamber is put into a magnetic stirrer; a water inlet/outlet of the draw solution pool is connected with the draw solution chamber of the forward osmosis membrane component; a probe of a conductivity controller is put into the pool; the water outlet of the high-concentration salt pond is connected with the water inlet of the draw solution pool through a pipeline with a strong brine pump; opening and closing of the strong brine pump are controlled by a conductivity meter; the delivery tank is put on an electric scale. The device disclosed by the invention is small in volume, simple and easy to operate, stable in test result, small in required area of the forward osmosis membrane, wide in application range, and applicable to test of the forward osmosis membranes with kinds of sources.

Performance test device of forward osmosis membrane

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Method of reducing salinity accumulation in forward osmosis membrane-bioreactor

Performance test device of forward osmosis membrane