Multi-stage treatment process for kitchen sewage

A technology for treating process and sewage, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, anaerobic digestion treatment, etc. It can solve the problems of sewage treatment process that is difficult to meet the discharge standards, the biochemical treatment system collapses, and the treatment effect is unstable to avoid acid inhibition, reduce the concentration of organic matter, and improve energy utilization
CN111153508AInactive Publication Date: 2020-05-15甘肃朴门生态管理咨询有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
甘肃朴门生态管理咨询有限公司
Publication Date
2020-05-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a kitchen sewage multi-stage treatment process, and belongs to the technical field of sewage treatment. The treatment process comprises the following steps: performing three-phase separation in a regulating tank; carrying out primary anaerobic high-temperature fermentation; carrying out secondary anaerobic medium-temperature fermentation; precipitating in a precipitation tank; performing a normal-temperature biochemical treatment in a biochemical pool; performing a sedimentation treatment in a secondary sedimentation tank; and discharging processed water into a clean water tank. The heat in the sewage treatment front process is fully utilized; energy is fully and efficiently utilized in a gradient mode, organic matters in sewage are degraded step by step, and the process can adapt to the characteristics of low pH, high SS, high COD, high oil content and the like of kitchen sewage, has the characteristics of high energy utilization rate, high biogas yield, high COD removal rate, stable treatment effect, low operation and maintenance cost and the like, can realize up-to-standard discharge of the kitchen sewage, and is suitable for popularization and application in the field of kitchen sewage treatment.
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Description

technical field

[0001] The invention belongs to the technical field of sewage treatment, in particular to a multi-stage treatment process for kitchen sewage. Background technique

[0002] Kitchen sewage belongs to high-concentration organic wastewater, which has the characteristics of high oil content, high SS content, high COD, and complex physical and chemical properties. It is difficult to achieve standard discharge by conventional sewage treatment processes. High oil content, high SS, and high NH3-N will cause a huge load impact on the domestic sewage treatment plant, leading to the collapse of the biochemical treatment system. Therefore, how to reasonably treat kitchen sewage and achieve standard discharge is restricting the development of the kitchen waste treatment industry. technical key.

[0003] At present, domestic kitchen waste treatment projects mostly adopt primary anaerobic fermentation + biochemical treatment (A / O or membrane treatment) for kitchen sewage tr...

Claims

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