Synchronous sewage treatment and nitrogen and phosphorus recycling bioelectrochemical device

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses a synchronous sewage treatment and nitrogen and phosphorus recycling bioelectrochemical device. The bioelectrochemical device comprises a reaction tank. A sludge hopper is arranged at the bottom of the reaction tank. The synchronous sewage treatment and nitrogen and phosphorus recycling bioelectrochemical device is characterized in that a water inlet and a water outlet are formed in symmetric side walls of the reaction tank, a biological reaction anode and a nitrogen and phosphorus crystallization cathode which are symmetric are arranged on the side walls of the reaction tank, and the biological reaction anode is connected with the nitrogen and phosphorus crystallization cathode through a wire; and a supporting top cover is arranged on the top of the reaction tank, and is provided with a sampling opening, a liquid level meter, an NH4+ storage tank, an acid storage tank, a solution oxygen probe, a Mg2+ storage tank, a temperature probe, an alkali storage tank, a pH probe, a PO43- storage tank and a mud scraping motor. The synchronous sewage treatment and nitrogen and phosphorus recycling bioelectrochemical device is used for treating domestic sewage which contains COD, nitrogen and phosphorus pollutants simultaneously, livestock breeding waste water and the like, the sewage treatment cost can be reduced effectively, safety of water quality is guaranteed, resource recycling is promoted, and the application prospect is wide.

Description

(1) Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a bioelectrochemical device for synchronous sewage treatment and nitrogen and phosphorus recovery. (2) Background technology [0002] The amount of sewage discharged in our country is increasing year by year, and the energy consumption and cost of sewage treatment are high. According to statistics, in recent years, my country's sewage discharge has reached 80 billion tons per year, more than 4,000 sewage treatment plants have been built, and the annual cost of sewage treatment has reached hundreds of billions of yuan. Traditional sewage treatment technology usually uses aerobic aeration to remove pollutants in sewage, which consumes a lot of electricity. In my country, the annual electricity consumption for sewage treatment alone accounts for 2% of the country's total power generation. With the increasing shortage of energy resources, saving energy and reducing cons...

AI Technical Summary

Problems solved by technology

By adding Mg to sewage 2+ , which can be combined with nitrogen and phosphorus in sewage to produce magnesium ammonium phosphate fertilizer, which is an effective method to recover nitrogen and phosphorus from sewage. However, the traditional method of nitrogen and phosphorus recovery has low efficiency and the process is uncontrollable

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