Electrolytic-biological anaerobic reactor and technique thereof

Abstract

The invention discloses an electrolytic-biological anaerobic reactor and a technique thereof. The electrolytic-biological anaerobic reactor comprises a reactor body and support legs, wherein the reactor body is orderly provided with a mud settling chamber, a gradual expansion chamber and an upflow reaction chamber from top to bottom; the outer side on the bottom of the reactor body is provided with a water inlet pipe and an external circulation pipe outlet; the upper part of the gradual expansion chamber is provided with an overflowing conical baffle; a three-phase separator is arranged in the mud settling chamber; the side wall on the upper part of the mud settling chamber is provided with an overflow weir, an overflow weir water outlet pipe and a gas-liquid separator; the upper part of the reactor body is provided with a backflow external circulation outlet; the outflow water flows into an external circulation inlet from the external circulation outlet through an external electrolysis bath; and the cathode and the anode of the electrolysis bath are separated by a cation exchange membrane. Through the electrolysis action of the external circulation, the invention can promote sulfides to be converted and oxidized, relieve the toxicity inhibition of the sulfides to the biological treatment, ensure the efficiency of the reactor for treating anaerobes and relieve the stroma inhibition. The reactor has large potential and strong impact resistance for treating waste water with low carbon-sulfur ratio.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an electrolysis-biological anaerobic reactor and a process thereof. Background technique [0002] With the rapid development of the national economy, my country's food, leather, pharmaceutical and chemical industries produce a large amount of wastewater containing high concentrations of organic matter and sulfate, which is difficult to treat and has an increasingly serious impact on the environment. In the traditional anaerobic biological treatment method, sulfate is often used as an electron acceptor and is reduced to sulfide (including H 2 S, HS - , S 2- ) [1] , and high concentration of sulfide will bring a series of problems such as toxicity, corrosion, odor and high oxygen consumption. Oxygen process deteriorates or even fails [2-3] . [0003] Among the treatment methods for sulfides, the common physical and chemical methods (such as air stripping, coagulation...

AI Technical Summary

Problems solved by technology

Biological desulfurization has the characteristics of low processing cost, no need for catalysts, and the ability to recover elemental sulfur. However, there are still many defects in the existing biological desulfurization process: 1) There must be a suitable electron acceptor, such as oxygen, nitrate or nitrite, etc.; 2 ) The biological process is not easy to control, and the process operation management is difficult

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