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

A technology for nitrate and organic matter, applied in chemical instruments and methods, water pollutants, anaerobic digestion treatment, etc., can solve the problems of secondary pollution and high cost, and achieve the effect of no secondary pollution and high treatment efficiency

Active Publication Date: 2007-10-10
中通环境治理有限公司
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Problems solved by technology

[0005] The purpose of this method is to solve the problems of high cost and easy to cause secondary pollution in the existing treatment technology in the treatment ...

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

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specific Embodiment approach 1

[0024] Specific embodiment one: in this embodiment, the method steps of synchronously removing organic matter, sulfide and nitrate in wastewater are as follows: 1. Start the reaction device: first add activated sludge to carry out biofilm formation, and then only add inorganic The substrate is used to domesticate sulfur autotrophic denitrifying bacteria, and the inorganic substrate consists of reducing sulfur-containing compounds (electron donor), nitrate (electron acceptor), sodium bicarbonate (inorganic carbon source) and dipotassium hydrogen phosphate (phosphorus source ) composition, after the nitrate removal rate reaches 80%, after the sulfur autotrophic denitrifying bacteria occupy a dominant position in the system, then add C to the original substrate 2 ~C 6 carbon-containing organic compounds and increase the dosage of nitrate in the influent to promote the growth of heterotrophic denitrifiers. Finally, the balance between sulfur autotrophic denitrifiers and heterotrop...

specific Embodiment approach 2

[0027] Specific implementation mode two: In this embodiment mode, the reducing sulfur-containing compound is Na in step one 2 S, H 2 S or Na 2 S 2 o 3 . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: In this embodiment, the nitrate is KNO in step one 3 or NaNO 3 . Others are the same as in the first embodiment.

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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...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/28C02F101/30C02F101/10
Inventor 王爱杰邓旭亮刘春爽任南琪荣丽丽杜大仲于振国陈川
Owner 中通环境治理有限公司
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