Salt-containing organic effluent treatment method

Abstract

The invention relates to a salt-containing organic effluent comprehensive treatment method, and belongs to the technical field of effluent treatment. The salt-containing organic effluent comprehensive treatment method comprises following steps: in pretreatment, a chemical precipitation agent is used for removing impurities, and a flocculating agent is used for clarification so as to ensure no suspended matter is left, and the pH value is adjusted to an appropriate value; MVR evaporative desalination is carried out so as to enrich organic matters in raw water; an obtained mother liquor is subjected to spraying pyrolysis so as to separate salts from organic matters in the mother liquor; a gas product obtained via pyrolysis is subjected to catalytic reforming so as to obtain flammable gas such as CO and H2; the flammable gas is subjected to heat energy recycling, and is delivered into an internal combustion engine for electricity generation and realize energy and resource utilization of effluent.

Description

technical field [0001] The invention relates to a treatment method for saline organic waste liquid, which belongs to the technical field of sewage treatment. Background technique [0002] The discharge of saline waste liquid has brought about very serious environmental pollution, especially industrial saline organic waste liquid, which not only contains high concentration of salt, but also contains a large amount of toxic and refractory organic matter, which is extremely harmful to the environment. According to relevant research reports at home and abroad, the recently developed treatment methods for this type of waste liquid mainly include biological and physicochemical combined processes, electrochemical and membrane treatment methods. According to the type and concentration of salt, the methods of brine separation include: nanofiltration, reverse osmosis (RO), multiple effect evaporation, etc. Traditional biological methods, such as activated sludge method, have a certai...

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Problems solved by technology

Traditional biological methods, such as activated sludge method, have a certain effect on the removal of organic matter in waste liquid, but the salt will seriously inhibit the normal metabolic function of microorganisms, making it difficult to carry out biochemical reactions; the electrochemical method is very easy to passivate, rust and consume The electricity is too much and the treatment effect is not stable enough; the chemical oxidation method requires more supporting equipment, the equipment is expensive, and the cost is high; the incineration method requires the waste liquid to have a certain calorific value, and the combustion temperature is high, and the salt content at high temperature is harmful to the equipment. Corrosive

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