Sewage resourcesization treatment method

A treatment method and resource-based technology, applied in the field of sewage treatment, can solve the problems of difficult long-term stable operation of the system, inability to effectively treat the crystallization mother liquor, and difficulty in the operation of concentrated water evaporation and crystallization.

Inactive Publication Date: 2015-11-18
GELANTE ENVIRONMENTAL PROTECTION ENG BEIJING CO LTD
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Problems solved by technology

[0005] The invention aims to solve the technical problem of frequent reverse osmosis cleaning in reclaimed water technology, and the reverse osmosis concentrated water cannot meet the discharge standard; the reverse osmosis membrane needs frequent chemical cleaning in the liquid zero discharge sewage treatment method, and the operation of

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  • Sewage resourcesization treatment method

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Embodiment Construction

[0017] Such as figure 1 As shown, the sewage resource treatment method is characterized in that it includes a chemical reaction precipitation unit, an organic matter advanced treatment unit, and a membrane water regeneration unit. The sewage is treated to obtain reclaimed water, and the concentrated water of the membrane water regeneration unit reaches the discharge standard. At the same time, a small amount of solid mud cake is generated;

[0018] The chemical reaction precipitation unit includes an acidic reaction tank, an alkaline reaction tank, a plurality of dosing devices, a sedimentation tank, an air flotation tank, a filter tank, an acid adding device, a sludge concentration tank and a filter press device The multiple dosing devices include acid dosing device, hydrogen peroxide dosing device, ferrous salt dosing device, sodium hydroxide dosing device, sodium carbonate dosing device, PAM dosing device; sedimentation tank is used to precipitate large particles Suspended...

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage resourcesization treatment method for sewage reuse water, liquid zero discharge and sewage resourcesization. According to the method, a chemical reaction sediment unit, an organic matter deep treatment unit and a membrane water regeneration unit are included, sewage is treated to obtain reuse water, concentrated water meeting the discharge standard and a small number of solid mud cakes; the sewage resourcesization treatment method is a low-consumption sustainable sewage regeneration method; a concentrated water deep treatment unit, a concentrated water resin processing unit, a film separation concentration unit, an evaporation separation and crystallization unit and a crystallization mother liquid drying unit are further included in the sewage resourcesization treatment method; the evaporation separation and crystallization unit comprises a plurality of evaporation crystallization devices, a plurality of thermal centrifugal separators, a plurality of cold centrifugal separators and a crystallization mother liquid spray dryer; the concentrated water treated in the membrane water regeneration unit is separated to obtain reuse water, sodium chloride, sodium sulfate, potassium chloride and a small amount of carnallite solid waste. By means of the method, sewage resourcesizaiton is achieved, and long-time stable operation can be achieved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, and relates to a liquid zero-discharge method for obtaining regenerated water from sewage treatment and separating main salt crystals in the water. technical background [0002] With the intensification of human economic activities, water resources will become the bottleneck of economic development. Therefore, in more and more cases, it is necessary to regenerate sewage into reclaimed water that can replace raw water; in some cases, it is necessary to achieve zero liquid discharge. [0003] The common reclaimed water technology is to treat the sewage after traditional biochemical treatment or other sewage with low organic pollution, including flocculation, ultrafiltration, and reverse osmosis treatment. At present, the main problem is that the organic pollutants in the water are not treated thoroughly before entering the membrane system. Pollutants are still at a high level, reverse osm...

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Application Information

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IPC IPC(8): C02F9/14
Inventor 孟广祯
Owner GELANTE ENVIRONMENTAL PROTECTION ENG BEIJING CO LTD
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