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Method for regulating and controlling short-cut nitrification-synchronous nitrification and denitrification sewage treatment process based on oxidation-reduction potential and application thereof

A technology of simultaneous nitrification and short-range nitrification, applied in anaerobic digestion treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of short-range nitrification-simultaneous nitrification and denitrification process efficiency is not ideal

Inactive Publication Date: 2021-06-01
北京美大环洲工程技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to provide a method for regulating short-range nitrification-synchronous nitrification-denitrification process in sewage treatment based on redox potential, so as to solve the unsatisfactory efficiency of short-range nitrification-synchronous nitrification-denitrification process in the prior art The problem;

Method used

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  • Method for regulating and controlling short-cut nitrification-synchronous nitrification and denitrification sewage treatment process based on oxidation-reduction potential and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0033]In a sewage treatment facility, take 20 kg of activated sludge with a solid content of 5% from the short-cut nitrification process, and cultivate it with a high ammonia nitrogen solution with a prepared ammonia nitrogen concentration of 300 mg / L to make nitrosating bacteria and nitrifying bacteria Bacteria are multiplied and enriched. In the enriched reactor, the PH value is controlled to be 8.0-8.3, and the dissolved oxygen is 0.5-1.0, so that it is under the reaction conditions where nitrosifying bacteria are dominant, so as to obtain a product with a high proportion of nitrosifying bacteria and a low proportion of nitrifying bacteria. Nitrosifying bacteria and nitrifying bacteria enrichment mixture. After changing the water every day and cultivating for one month, the bacterial mixture was naturally precipitated three times, and the supernatant was removed to obtain nitrosating bacteria and nitrifying bacteria concentrates with a solid content of 5%.

[0034] Take by...

preparation example 2

[0037] In a sewage treatment facility, take 20 kg of activated sludge with a solid content of 5% from the short-cut nitrification process, and cultivate it with a high ammonia nitrogen solution with a prepared ammonia nitrogen concentration of 300 mg / L to make nitrosating bacteria and nitrifying bacteria Bacteria are multiplied and enriched. In the enriched reactor, the PH value is controlled to be 8.0-8.3, and the dissolved oxygen is 0.5-1.0, so that it is under the reaction conditions where nitrosifying bacteria are dominant, so as to obtain a product with a high proportion of nitrosifying bacteria and a low proportion of nitrifying bacteria. Nitrosifying bacteria and nitrifying bacteria enrichment mixture. After changing the water every day and cultivating for one month, the bacterial mixture was naturally precipitated three times, and the supernatant was removed to obtain nitrosating bacteria and nitrifying bacteria concentrates with a solid content of 5%.

[0038] Weigh ...

preparation example 3

[0045] Enrichment and concentration culture of denitrifying bacteria: in sewage treatment plant A 2 In the / O process, take the activated sludge from the anoxic pool, and use the prepared high nitrate nitrogen solution with a nitrate nitrogen concentration of 300mg / l to cultivate and domesticate it, so that the denitrifying bacteria can be multiplied and enriched. Dissolved oxygen is controlled at 0.3-0.5mg / l in the acclimatization and enrichment reactor, and sufficient carbon source is added to the acclimatization reactor, so that denitrifying bacteria can rapidly multiply and enrich. The acclimatized and enriched mixed solution undergoes 2-3 times of natural precipitation, and the supernatant is removed to obtain a concentrated solution of denitrifying bacteria with a solid content of 3%-5%.

[0046] According to the protocol in Preparation Example 1, the obtained concentrated bacterial solution containing the denitrifying bacteria was prepared to obtain the required active ...

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Abstract

The invention belongs to the technical field of municipal sewage treatment and industrial wastewater treatment, particularly relates to a method for regulating and controlling a short-cut nitrification-synchronous nitrification and denitrification process for sewage treatment based on oxidation-reduction potential, and further discloses a sewage treatment process combining anaerobic hydrolytic acidification, short-cut nitrification-synchronous nitrification and denitrification and aerobic oxidation. According to the method for regulating and controlling the short-cut nitrification-synchronous nitrification and denitrification process for sewage treatment based on the oxidation-reduction potential, the concentration of ammonia nitrogen, nitrite nitrogen, nitrate nitrogen and total nitrogen in the short-cut nitrification-synchronous nitrification and denitrification process is monitored in sewage biochemical treatment, the oxidation-reduction potential is adjusted by adjusting parameters such as pH, dissolved oxygen and alkalinity of the process, so that the oxidation-reduction potential is regulated and controlled in a range of -100mv to 250mv, the internal environmental conditions of the process are accurately controlled, accurate, stable and efficient operation of short-cut nitrification-synchronous nitrification and denitrification is ensured, and conditions are created for popularization of the process.

Description

technical field [0001] The invention belongs to the technical field of municipal sewage treatment, industrial wastewater treatment and watershed management, and specifically relates to a method for controlling short-range nitrification-synchronous nitrification and denitrification process of sewage treatment based on oxidation-reduction potential, and further discloses a combined anaerobic hydrolysis acidification, short-range Nitrification-Simultaneous nitrification, denitrification and aerobic oxidation sewage treatment process. Background technique [0002] At present, the core treatment method for municipal sewage and industrial wastewater containing pollutant nitrogen is biochemical treatment. There are many conventional biochemical treatment processes, and the main biochemical denitrification treatment processes mainly include: short-range nitrification, simultaneous nitrification and denitrification, A / O, A 2 / O, SBR, CAST or MBR, among them, short-cut nitrification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/10C02F3/34C02F3/28C02F3/02
CPCC02F3/30C02F3/34C02F3/342C02F3/10C02F3/28C02F3/02Y02W10/10
Inventor 徐冬梅
Owner 北京美大环洲工程技术有限责任公司
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