Method for treating high-concentration ammonia nitrogen wastewater

A technology of ammonia nitrogen wastewater and treatment method, which is applied in the field of high concentration ammonia nitrogen wastewater treatment, can solve the problems that high ammonia nitrogen wastewater cannot be effectively removed, ammonia nitrogen wastewater has not been further studied, and the proportion of activated sludge is low, so as to reduce excess sludge The effect of high volume, high value-added products, and low sludge disposal costs
CN110194569AInactive Publication Date: 2019-09-03见嘉环境科技(苏州)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
见嘉环境科技(苏州)有限公司
Publication Date
2019-09-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for treating high-concentration ammonia nitrogen wastewater, wherein the method comprises: S1, filtering; S2, salinization; S3, impurity removing; S4, biological nitrogen removal; and S5, precipitation. According to the present invention, the method of the present invention sequentially comprises salinization with HCl and impurity removing with NaOH, is different from the conventional method firstly performing metal impurity removing with NaOH, can effectively avoid the pollution caused by the NH3 escaping into the air after the NaOH adding, can respectively obtain high-purity NH4Cl and metal hydroxide solids respectively for agrochemical fertilizers and metal refining and purifying, such that the waste caused by the difficulty in the separation after mixingcan be avoided.
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Description

technical field

[0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for high-concentration ammonia nitrogen wastewater. Background technique

[0002] Nitrogen pollution is one of the important causes of water eutrophication. Controlling nitrogenous compounds in water plays an important role in maintaining water cleanliness and preventing water eutrophication. It has attracted extensive attention and research in recent years. Nitrogen-containing wastewater discharged from petroleum, chemical and fertilizer industries, such as leather wastewater, has the characteristics of high pollutant concentration, complex composition, and large discharge volume, and it is difficult to meet the discharge standards; especially these wastewaters are mostly characterized by high salt (salt content The amount is greater than 15g / L), resulting in poor biodegradability of sewage, which brings great difficulties to treatment and creates con...

Claims

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