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Sewage treatment process combining anaerobic hydrolysis with short-cut nitrification-synchronous nitrification and denitrification and aerobic oxidation

A short-range nitrification and simultaneous nitrification technology, applied in anaerobic digestion treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. The effect of standard transformation cost, reduction of hydraulic retention time, and accurate and efficient removal

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

AI Technical Summary

Problems solved by technology

[0003] Microbial embedding technology has been researched domestically and internationally for decades. Due to various reasons, this technology has not been broken through and applied well.

Method used

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  • Sewage treatment process combining anaerobic hydrolysis with short-cut nitrification-synchronous nitrification and denitrification and aerobic oxidation

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0029] 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%.

[0030]Weigh 5...

preparation example 2

[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] Weigh ...

preparation example 3

[0041] Enrichment and concentration culture of anaerobic flora: in sewage treatment plant A 2 In the / O process, the activated sludge of the anaerobic tank is taken, and a high-concentration COD solution with a concentration of 2000mg / l is prepared with industrial glucose to cultivate and domesticate it, so that the anaerobic microorganisms can be rapidly multiplied and enriched. Control the dissolved oxygen to be less than 0.2mg / l in the reactor for cultivating acclimatization and enrichment, and the mixed solution after acclimatization and enrichment undergoes natural precipitation for 2-3 times, removes the supernatant, and obtains a solid content of 3%-5% concentrate of anaerobic microbial flora.

[0042] According to the protocol in Preparation Example 1, the obtained concentrated bacterial solution containing the anaerobic flora was prepared to obtain the desired anaerobic flora-embedded active filler.

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Abstract

The invention belongs to the technical field of municipal sewage treatment, industrial wastewater treatment and drainage basin treatment, particularly relates to a sewage treatment process combining anaerobic hydrolysis with short-cut nitrification-synchronous nitrification and denitrification and aerobic oxidation, and more particularly relates to a sewage treatment process based on an embedded microbial flora active filler. According to the sewage treatment process disclosed by the invention, the embedded microbial flora active filler is applied to each stage of treatment process of sewage, so that the concentration of active microorganisms is increased, the removal efficiency of each pollutant is effectively improved, the design parameter volume load of the pollutants can be increased by 50%-100%, and the hydraulic retention time can be reduced by 33%-50%; and the whole process can be operated more efficiently and stably.

Description

technical field [0001] The invention belongs to the technical field of municipal sewage treatment, industrial waste water treatment and watershed treatment, and specifically relates to a sewage treatment process combining anaerobic hydrolysis with short-range nitrification-simultaneous nitrification and denitrification, and aerobic oxidation, and more specifically relates to a sewage treatment process based on embedded microbial bacteria Sewage treatment process of group active filler. 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 and simultaneous nitrification and denitrifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02C02F3/10C02F3/28C02F3/30C02F3/34
CPCC02F3/02C02F3/28C02F3/30C02F3/10C02F3/342Y02W10/10
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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