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Method for sludge reduction using ultrasonic treatment

An ultrasonic and sludge technology, applied in chemical instruments and methods, sludge treatment, biological sludge treatment, etc., can solve the problems of high operating costs, large investment, immature technology, etc., and achieve stable output, high economic benefits, The effect of saving construction investment

Inactive Publication Date: 2006-05-03
北京紫石千年环保设备有限公司
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Problems solved by technology

However, the above-mentioned technologies generally have disadvantages such as immature technology, high operating costs, and large investment.
The technology of ultrasonic treatment of sludge is currently in the stage of laboratory research in China, and has not been applied to engineering.

Method used

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  • Method for sludge reduction using ultrasonic treatment

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Embodiment Construction

[0027] see figure 1 According to the present invention, the method for treating sludge with ultrasonic wave to reduce sludge volume includes biochemical unit, sedimentation unit, sludge anaerobic digestion unit, ultrasonic treatment unit and sludge dehydration unit.

[0028] The biochemical unit concentrates the sludge in the biochemical pool, effectively removes organic pollutants through microorganisms, and transforms organic compounds into inorganic small molecular substances. Since urban sewage itself contains a large number of microorganisms, including anaerobic bacteria and aerobic bacteria, according to the characteristics of each urban sewage, when choosing anaerobic treatment, a closed biochemical pool is used to make the anaerobic bacteria multiply; During oxygen treatment, the sewage is filled with air through the aerator to increase the oxygen content in the sewage and make the aerobic bacteria multiply. Generally speaking, the hydraulic retention time of aerobic ...

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Abstract

The invention relates to a sludge-decrement method with ultrasonic wave, which comprises following steps: in biochemical unit, removing organic pollutant by microbe in sewage, translating organic compound into inorganic micromolecular material; in deposition unit, after the treated sewage enters second-deposition pond, depositing to separate sludge and water and condense sludge; in sludge anaerobic digestion unit, conveying the sludge from former pond into sealing tank to breed the anaerobe and amphimicrobe on sealing anaerobic condition for digestion; in ultrasonic treatment unit, treating the sludge with 20kHz-100kHz sonic wave; in sludge dewater unit, taking centrifugal dehydration to separate solid and liquid. This method increases greatly methane yield, decreases residual sludge of biochemical system, and has high economic benefit.

Description

technical field [0001] The invention relates to a treatment method for ultrasonic treatment of sludge, in particular to a method for treating sludge with ultrasonic technology so as to reduce the amount of sludge. Background technique [0002] In the process of urbanization development, with the improvement of environmental quality standards, the improvement and deepening of sewage treatment rate and treatment degree, the sludge production has greatly increased. At present, more than 80% of the sewage treatment plants in the world use the activated sludge method to treat sewage. Its biggest drawback is that it produces a surprisingly large amount of excess sludge while treating sewage. Generally, 15-100L of activity is produced for every kilogram of organic matter removed. Sludge, the water content of these sludges reaches more than 95%, and the cost of excess sludge treatment is high, accounting for about 25% to 65% of the operating costs of sewage plants. European countri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/36C02F1/52C02F11/04C02F11/12
CPCY02E50/30Y02W10/20
Inventor 韩德民齐小力王晶
Owner 北京紫石千年环保设备有限公司
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