Method and reactor for removing organic matter, sulfide, and nitrate in wastewater synchronistically

Abstract

This invention relates to method and reactor for removing organic matters, sulfides and nitrates from wastewater simultaneously. The method solves the problems of high cost and easy secondary pollution faced by the present technique in treating sulfur and nitrogen-containing wastewater. The method utilizes sulfur-autotrophic denitrifying bacteria and sulfur-heterotrophic denitrifying bacteria biological membrane to treat wastewater. The reactor is a fixed bed biological membrane reactor. The filler is lava or activated carbon. A reaction zone is formed at the middle and lower part of the inner cavity of the cylinder, while a precipitation zone is formed at the upper part. A gas collection zone is formed at the middle and lower part of the inner cavity of the gas collection chamber, while a water storage zone is formed between the bottom of the gas collection chamber and the flush weir. The method has such advantages as high treatment efficiency, no secondary pollution, low running cost, and low sludge productivity. The reactor has such advantages as small floor area and easy operation. The reactor can be continuously operated, and can be solely used or used as one treatment unit for wastewater treatment.

Description

technical field

[0001] The invention relates to a method and device for treating wastewater. Background technique

[0002] With the rapid development of petrochemical, pharmaceutical, food fermentation, papermaking and other industries, the discharge of a large amount of sulfur-containing and nitrogen-containing organic wastewater has become a major threat to the environment, and efficient removal methods for organic pollutants and nitrogen, sulfur and other nutrient salts are also gradually It has become a research and development hotspot in the field of wastewater treatment. At present, for sulfate and ammonia nitrogen in high-concentration organic wastewater, separate treatment strategies are usually adopted, and the respective treatment processes are carried out in two steps, that is, sulfate is reduced to sulfide and then oxidized to elemental sulfur, ammonia nitrogen is oxidized to nitrate and then processed. Denitrification into nitrogen, the process is complicated a...

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