Combined treatment process for high-concentration organic waste water

A technology of organic waste water and treatment process, applied in water/sewage multi-stage treatment, oxidized water/sewage treatment, biological water/sewage treatment, etc. Low and other problems, to achieve the effect of wide application, low sludge output, and reduced operating costs

Inactive Publication Date: 2009-09-02
BEIJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anaerobic method still has some shortcomings when used as a pretreatment, for example, the affinity of anaerobic microorganisms to oil is low, and the anaerobic products with high concentration of sulfate have higher toxicity to methanogens, etc.

Method used

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  • Combined treatment process for high-concentration organic waste water

Examples

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Example Embodiment

[0021] Example 1

[0022] The water quality characteristics of a certain high-sulfur fermentation industrial wastewater are shown in Table 1. The present invention inoculates microaerobic bacteria in a microaerobic reactor and conducts batch cultivation. When the MLSS reaches 8g / L, it is directly passed into the undiluted Fermentation wastewater starts continuous treatment, the dissolved oxygen content in the reactor is controlled between 0-0.5mg / L, the hydraulic retention time is 3d, the supernatant is oxidized by the ozone generator after the mixed liquid is precipitated in the sedimentation tank, and the contact time between ozone and wastewater is 60~120min, after ozone oxidation, the wastewater enters the activated sludge tank after passing through the intermediate tank. The temperature of the reaction zone is normal temperature, the hydraulic retention time is controlled for 10h, the dissolved oxygen concentration is greater than 2mg / L, the sludge concentration is 3g / L, and ...

Example Embodiment

[0025] Example 2

[0026] The water quality characteristics of a certain food processing wastewater are shown in Table 2. First, microaerobic bacteria were inoculated in a microaerobic reactor and batch cultured. When the MLSS reached 4g / L, the undiluted fermentation wastewater was directly passed into it. Continuous treatment, control the dissolved oxygen content in the reactor to be between 0-0.5mg / L, the hydraulic retention time is 3d, the supernatant liquid enters the Fenton reagent oxidation reactor after the mixed liquid is precipitated in the sedimentation tank, according to H 2 O 2 / COD(W / W)=4.0, Fe 2+ / H 2 O 2 (W / W) = 0.08 to add Fe 2+ And H 2 O 2 After 130 minutes of reaction, it enters the intermediate tank, the effluent from the intermediate tank (pH 7.5) enters the activated sludge tank, the temperature of the reaction zone is normal temperature, the hydraulic retention time is 10h, the dissolved oxygen concentration is greater than 2mg / L, the sludge concentration is ...

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Abstract

Aiming at the difference of biodegradable properties of a great amount of organisms in high-concentration organic waste water at present and according to the current situation of the treatment process of high-concentration organic waste water, the invention provides a combined treatment process for high-concentration organic waste water, which has high waste water removing efficiency and wide application range and combines a micro aerobic bacteria treatment process, a chemical oxidation process and an activated sludge process. In the combined treatment process, the micro aerobic bacteria treatment process is firstly adopted to remove most of biodegradable organisms so as to ensure that the object treated by the chemical oxidation process is basically nonbiodegradable organisms; the chemical oxidation process is adopted to improve the biodegradability of the waste water so as to lay a foundation for the subsequent biological treatment; and at last the activated sludge process is used as post treatment so as to ensure the quality of outlet water. The process can be directly applied to different types of high-concentration organic waste water containing high content of oil, sulfur and ammonia, and has the advantages of high removing efficiency, low sludge output and wide application range.

Description

technical field [0001] The invention belongs to the fields of environmental engineering and wastewater treatment engineering, and in particular relates to a combined process of "micro-aerobic bacteria treatment method + chemical oxidation method + activated sludge method". The combined process is widely applicable to different types of high-concentration organic wastewater including fermentation industrial wastewater, sugar wastewater, printing and dyeing wastewater, food processing wastewater, and landfill leachate. Background technique [0002] With the rapid growth of my country's economy, a large amount of sewage discharge has caused water pollution problems to become more and more serious. It is predicted that my country's current industrial wastewater accounts for more than 70% of the total wastewater, including fermentation industrial wastewater (such as citric acid water, brewing wastewater, antibiotic wastewater, etc.), sugar wastewater, printing and dyeing wastewat...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/72C02F3/12C02F3/34
CPCY02W10/10
Inventor 郑少奎崔粲粲
Owner BEIJING NORMAL UNIVERSITY
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