High-salt high-COD wastewater recovery zero-discharge system and technology
A waste water recovery and zero discharge technology, which is applied in descaling and water softening, water/sewage treatment, special compound water treatment, etc., can solve the problems of large fluctuations in water quality, high concentration, and complex organic components, and achieve low energy consumption for evaporation , High salt separation efficiency, high concentration multiple effect
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Embodiment 1
[0043] A zero-discharge system for recycling high-salt and high-COD wastewater, including:
[0044] High-efficiency pretreatment unit: the wastewater in the regulating tank enters the Fenton system to oxidize and remove some organic matter, enters the softening tank to remove hardness, and the produced water enters the MBR membrane bioreactor to further remove organic pollutants and turbidity through the action of microorganisms, and then enters the ultrafiltration system , after ion exchange;
[0045] Two-stage concentration unit: firstly remove carbon through the carbon remover, enter the first-stage RO system for concentration reduction through security filtration, and then obtain sodium chloride brine and sodium sulfate brine through two-stage nanofiltration system treatment, and then enter the second stage respectively The RO concentration system further concentrates and reduces the weight;
[0046] Evaporation and crystallization unit: After concentrated by high-pressur...
Embodiment 2
[0056] A zero-discharge system for recycling high-salt and high-COD wastewater, including:
[0057] High-efficiency pretreatment unit: the wastewater in the regulating tank enters the Fenton system to oxidize and remove some organic matter, enters the softening tank to remove hardness, and the produced water enters the MBR membrane bioreactor to further remove organic pollutants and turbidity through the action of microorganisms, and then enters the ultrafiltration system , after ion exchange;
[0058] Two-stage concentration unit: firstly remove carbon through the carbon remover, enter the first-stage RO system for concentration reduction through security filtration, and then obtain sodium chloride brine and sodium sulfate brine through two-stage nanofiltration system treatment, and then enter the second stage respectively The RO concentration system further concentrates and reduces the weight;
[0059] Evaporation and crystallization unit: After being concentrated by high-p...
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