Microalgae harvesting system for treatment of mariculture wastewater

Abstract

The invention relates to the technical field of sewage treatment, in particular to a microalgae harvesting system for treatment of mariculture wastewater. The microalgae harvesting system comprises a water inlet tank, an anoxic membrane bioreactor communicating with the water inlet tank, and a microalgae membrane reactor communicating with the anoxic membrane bioreactor, wherein baffles are arranged in the anoxic membrane bioreactor and microalgae membrane reactor; a first hollow fiber membrane assembly and a polyurethane sponge filler are arranged in the anoxic membrane bioreactor; an aeration head and a second hollow fiber membrane assembly are arranged in the microalgae membrane reactor, and a light-emitting assembly is arranged on the outer side of the bottom of the microalgae membrane reactor; the first hollow fiber membrane assembly communicates with the microalgae membrane reactor through a pipeline; the anoxic membrane bioreactor communicates with the microalgae membrane reactor through the first hollow fiber membrane assembly; and the second hollow fiber membrane assembly communicates with a second water outlet tank. According to the invention, the problems of poor nitrogen and phosphorus removal efficiency, serious membrane pollution and the like which limit the development of a sewage treatment technology when existing anoxic membrane bioreactors and microalgae membrane reactors operate independently are solved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a microalgae harvesting system for mariculture wastewater treatment. Background technique [0002] Microorganisms have the advantages of low cost and good effect on wastewater treatment. Therefore, microbial treatment of mariculture wastewater is one of the most widely used methods at present, but its effectiveness depends on the biological activity of microorganisms. High salinity stress often brings There are many technical difficulties, such as long start-up time for nitrification treatment of mariculture wastewater, salinity will lead to cracking of sludge flocs to produce fine particles, and serious membrane fouling in the process of matching with membranes. [0003] The anoxic filter reactor adds suspended fillers on the basis of activated sludge, and the sludge particles adhere to the fillers to form a biofilm rich in biological phases that can realize simultaneou...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a microalgae harvesting system for seawater aquaculture wastewater treatment, to solve the above problems, to solve the existing anoxic membrane bioreactor and microalgae membrane reactor in the separate operation of nitrogen and phosphorus removal Poor efficiency, serious membrane fouling and other problems that limit the development of sewage treatment technology, and then provide an anoxic membrane bioreactor-microalgae membrane reactor system for simultaneous harvesting of microalgae and mariculture wastewater treatment

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