Method for synergistically decreasing residential sludge by utilizing ozone preoxidation-membrane bioreactor

A technology of membrane bioreactor and excess sludge, which is applied in biological sludge treatment, oxidation treatment sludge, chemical instruments and methods, etc., can solve environmental pollution and other problems, and achieve high reduction efficiency and low sludge load , the effect of reducing the cycle time

Inactive Publication Date: 2011-05-18
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

Excess sludge is a solid waste, containing a large amount of toxic and harmful substances and unstabilized or...

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  • Method for synergistically decreasing residential sludge by utilizing ozone preoxidation-membrane bioreactor
  • Method for synergistically decreasing residential sludge by utilizing ozone preoxidation-membrane bioreactor
  • Method for synergistically decreasing residential sludge by utilizing ozone preoxidation-membrane bioreactor

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Embodiment 1

[0018] The present invention will be further described below in combination with specific embodiments.

[0019] 1. The effect of ozone dosage on sludge properties. The object of this group of experiments is the concentrated sludge in the secondary sedimentation tank in the activated sludge reactor. No pretreatment is carried out before ozone oxidation treatment. The sludge MLSS is 9000-11000mg / L , with a pH of approximately 7.0. Adjust the flow rate of the gas source of the ozone generator to 60L / h, and perform ozone oxidation treatment on the sludge. The amount of each batch of ozone oxidation sludge is 500mL. By controlling the treatment time, when the ozone dosage is 0.01, 0.02, 0.04, 0.06, 0.08, 0.10gO 3 / gSS, the relevant indicators were measured. In the process of ozone oxidation, part of the solid-phase organic matter is inorganicized, and part of it exists in the form of liquid-phase organic matter after being dissolved; the minimum effective dosage and maximum crack...

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Abstract

The invention belongs to the field of sludge treatment and disposal, in particular relates to a process of a sludge decreasing method by effectively combining a chemical oxidation technology and a biotechnology. The process comprises the following steps: (1) in an ozone preoxidation treatment unit: generating strong oxidization by dosing ozone to damage hardly biodegradable cell membranes, and the like, rapidly dissolve matters in the cell in water, oxidize insolvable macromolecular matters to be easily utilized by microorganisms and be favorable to further biodegradation; (2) in a membrane bioreactor unit: synergistically strengthening to remove organic matters released by the crushed sludge by utilizing the self digestion of the sludge and the technologies of biodegradation, membrane filtration, and the like in the membrane bioreactor so as to achieve the sludge decreasing aim and also ensure that the effluent quality accords with the emission standard or the industrial reuse water quality requirement. The process has the advantages of good sludge decreasing effect, no secondary pollution, low energy consumption, direct effluent drainage, and the like.

Description

1. Technical field [0001] The invention relates to a method for ozone preoxidation-membrane bioreactor to cooperate with excess sludge reduction. 2. Background technology [0002] The essence of sewage biochemical treatment is to use colloidal and dissolved organic matter in sewage as a source of nutrition for microorganisms, and convert them into carbon dioxide, water and biological matter, and excess biological matter constitutes excess sludge. Excess sludge is a solid waste, containing a large amount of toxic and harmful substances and unstabilized organic matter. If it is not properly disposed of, it will cause serious pollution to the environment after discharge. At present, the annual discharge of dry sludge from urban sewage treatment plants in my country is about 300,000 tons, with an annual growth rate of about 10%. [0003] Sludge treatment and disposal costs are expensive. In urban sewage treatment plants in my country, the cost of traditional sludge treatment ac...

Claims

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Application Information

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IPC IPC(8): C02F11/02C02F11/06C02F3/12
CPCY02W10/10
Inventor 张立秋封莉蒋文博吴运松王丽平潘晓瑞
Owner BEIJING FORESTRY UNIVERSITY
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