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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
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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. , the limitations of the anaerobic method determine that the application of the combined process of "anaerobic method + chemical oxidation method + biological treatment method" in the treatment of high-concentration organic wastewater has certain limitations

Method used

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  • Combined treatment process for high-concentration organic waste water

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Embodiment 1

[0022] A certain high-sulfur fermented industrial waste water, its water quality characteristics are as shown in table 1, the present invention inoculates micro-aerobic bacteria in the micro-aerobic reactor and carries out batch culture, when MLSS reaches 8g / L, directly pass into this undiluted The fermentation waste water starts to be treated continuously, the dissolved oxygen content in the reactor is controlled between 0-0.5 mg / L, and the hydraulic retention time is 3 days. 60-120 minutes, after ozone oxidation, the wastewater enters the activated sludge tank after passing through the intermediate tank. On the 12th day, 40% of the sludge was refluxed, and the effluent from the activated sludge tank was settled in the secondary settling tank to remove suspended solids and then discharged up to the standard. The water output indicators are shown in Table 1.

[0023] Table 1 The index values ​​before and after a certain fermentation industrial wastewater is treated by the com...

Embodiment 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 cultured in batches. When the MLSS reached 4g / L, the undiluted fermentation wastewater was directly introduced into Continuous treatment, control the dissolved oxygen content in the reactor between 0-0.5mg / L, the hydraulic retention time is 3d, the supernatant after the mixed solution is precipitated in the sedimentation tank enters the Fenton reagent oxidation reactor, according to the H 2 o 2 / COD(W / W)=4.0, Fe 2+ / H 2 o 2 Add Fe at a ratio of (W / W)=0.08 2+ and H 2 o 2 , after 130 minutes of reaction, it enters the intermediate tank, and the water from the intermediate tank (pH 7.5) enters the activated sludge tank. The residence time is 10 days, 20% of the sludge is refluxed, and the effluent from the activated sludge tank is settled in the secondary sedimentation tank to remove suspended solid...

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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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