Membrane absorption deamination method and membrane absorption deamination system based on direct contact type microporous aeration enhancement

Abstract

The invention relates to the technical field of wastewater treatment, particularly to a membrane absorption deamination system and a membrane absorption deamination method based on direct contact typemicroporous aeration enhancement. In the direct contact type aeration enhanced membrane absorption deamination process, membrane surface pollution deposition can be reduced through aeration, so thatthe problems of membrane wetting and hydrophilization caused by membrane pollution are reduced, and the cleaning frequency of a membrane assembly is reduced; and a gas-liquid two-phase flow can be formed through aeration stripping, so that the resistance in a mass transfer process can be effectively reduced, the volatilization rate of ammonia in wastewater and the transmembrane speed of ammonia are increased, and the deamination efficiency is improved. The method has great advantages in the aspects of investment cost and operation cost, and is a novel wastewater deamination and ammonia recovery technology which is energy-saving, consumption-reducing and sustainable in resource development.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a membrane absorption deamination system and method based on direct contact microporous aeration enhancement. Background technique [0002] Ammonia nitrogen is one of the main factors causing water eutrophication and environmental pollution, which seriously threatens human production, life and ecological balance. How to economically and effectively remove and recover ammonia nitrogen in wastewater to reduce environmental pollution has become an urgent and important research topic. Due to the characteristics of high concentration of ammonia nitrogen, poor biodegradability and great environmental hazards, industrial ammonia nitrogen wastewater has become the main source of ammonia nitrogen in wastewater in my country. The discharge of industrial ammonia nitrogen wastewater into the water body not only causes eutrophication of the water body, causes black and odorous w...

AI Technical Summary

Problems solved by technology

Although the membrane aeration method can remove most of the ammonia nitrogen in the wastewater, the concentration of the ammonia nitrogen wastewater entering the membrane absorption contactor is still not low, and the hydrophilization problem caused by the membrane surface pollution caused by inorganic salts, colloids and organic matter in the wastewater is in the persists in the long run

[0007] So far, the hydrophilization problem caused by membrane fouling is still a bottleneck problem restricting the industrialization of membrane absorption process.

Images