Technology for treating high concentration ammonia nitrogen waste water using membrane based absorption method

Abstract

A process for reclaiming high concentration ammonia nitrogen waste water by film based absorption wherein a hollow fiber film contactor is employed, the high concentration ammonia nitrogen waste water flows through the tube pass of the contactor, i.e. the lumen of hollow fiber, while the absorption solution H2SO4 flows through shell pass. When applied to treatment for high concentration residual ammonia in coking plant, the invention achieves the effect of one time discharge standard meeting, with the ammonia clearance reaching 99.7% in the water outlet, and the ammonia recovery ratio in the absorbing agent reaching 99.5%.

Description

technical field

[0001] The invention relates to recovering ammonia in high-concentration ammonia-nitrogen wastewater by using a membrane-based absorption technology. Background technique

[0002] As we all know, the eutrophication problem of my country's oceans, rivers, lakes and reservoirs is relatively prominent. The main cause of water eutrophication is excessive nitrogen, phosphorus and related pollutants in the water body. A large amount of high-concentration ammonia-nitrogen wastewater discharged from nitrogen fertilizer plants is one of the main sources of pollution. my country currently has more than 1,000 large, medium and small nitrogen fertilizer plants, which discharge about 4 billion tons of wastewater every year, and the total amount of ammonia nitrogen discharged is more than 300,000 tons. Obviously, the water pollution caused by nitrogen fertilizer factory wastewater is relatively serious. my country has listed ammonia nitrogen as one of the control indica...

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