Microbial flocculant, compound flocculation system and preparation and application methods thereof

A microbial flocculant and system technology, applied in chemical instruments and methods, biological water/sewage treatment, natural water treatment, etc., can solve problems that hinder the development and application of landfill leachate treatment technology, low treatment efficiency, and high treatment cost. Achieve the effects of reducing material utilization, high-efficiency flocculation effect, and wide-ranging sources

Inactive Publication Date: 2016-02-17
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology

However, the existing landfill leachate treatment combination process still has disadvantages such as high treatment cost, low

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  • Microbial flocculant, compound flocculation system and preparation and application methods thereof

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Embodiment Construction

[0027] The present invention is specifically described below by the examples, the examples are only used to further illustrate the present invention, can not be interpreted as the limitation of the protection scope of the present invention, some non-essential improvements made by those skilled in the art according to the content of the present invention And adjustments also belong to the protection scope of the present invention.

[0028] combine figure 1 .

[0029] 1. Preparation of microbial flocculant:

[0030] (1) The bacterial strain preparing microbial flocculant is selected as bacillus polymyxa;

[0031] (2) Preparation of fermentation medium: the acid hydrolysis product of crop straw was selected as the fermentation medium; specifically, the crop straw was mixed with dilute sulfuric acid with a concentration of 1.5% by weight at a solid-to-liquid ratio of 1:8. After reacting for 90 minutes, collect the supernatant by centrifugation, mix the supernatant with alkaline...

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Abstract

The invention discloses a microbial flocculant, a compound flocculation system and a preparation and application methods thereof. The method comprises the steps that crop straw is used as raw materials, the microbial flocculant is prepared in a fermentation mode, and the compound flocculation system is constructed; during waste leachate treatment, polymerized ferric sulfate and the microbial flocculant are adopted to be added in a staged mode; advanced treatment is performed on the treated waste leachate by adopting a baffling overflowing type filler biological denitrification reactor. The waste leachate is pretreated through the compound flocculation system constructed by the microbial flocculant and the polymerized ferric sulfate, the problems that the waste leachate is poor in biochemicalization performance and high in pollutant concentration are solved, the microorganism toxic action and the physical and chemical treatment technology cost are further optimized; a follow-up biological denitrification system is low in load, and the biochemicalization performance of the waste leachate is improved; the removal rate of matter hard to degrade in the waste leachate is greatly improved, the problem that the waste leachate with the high COD content is hard to treat is solved, and waste is comprehensively utilized.

Description

technical field [0001] The invention belongs to the technical field of environmental protection methods, in particular to the technical field of waste water treatment, in particular to a treatment method for landfill leachate, in particular to a microbial flocculant, a compound flocculation system and its preparation, and its use in landfill leachate treatment application. Background technique [0002] According to statistics, the current annual output of urban solid waste in my country has reached more than 140 million tons, of which more than 90% of urban solid waste is disposed of in sanitary landfill. During the sanitary landfill process, the sewage filtered out due to the leaching of fermentation and precipitation, immersion of surface water and groundwater is called landfill leachate. Generally speaking, landfill leachate contains high concentrations of COD, ammonia nitrogen, humic acid (HA), and turbidity. It has poor biochemical properties and complex components, wh...

Claims

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Application Information

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IPC IPC(8): C02F3/34
CPCC02F3/34C02F3/348C02F2103/34C02F2301/10
Inventor 郭俊元叶芝祥刘盛余余静程庆峰张菊
Owner CHENGDU UNIV OF INFORMATION TECH
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