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Method for treating sludge and extracting organic substances by using microwave

A microwave treatment and organic matter technology, which is applied in the preparation method of peptides, organic fertilizers, organic chemistry, etc., can solve the problems of chemical heat source, complex energy-consuming process, and difficult to operate in large-scale industrial production.

Active Publication Date: 2012-08-15
北京神州朗泰低碳科技有限公司
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Problems solved by technology

[0006] However, the general chemical method requires heat source, energy consumption, and complicated process; the distance between the two oscillators and the sludge concentration must be strictly controlled in the ultrasonic treatment of sludge, and large-scale industrial production is difficult to operate
There are no published patent documents on the integrated technology of microwave treatment of sludge to extract protein and other organic matter mixture, and to promote the overall reduction of sludge and resource utilization

Method used

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  • Method for treating sludge and extracting organic substances by using microwave
  • Method for treating sludge and extracting organic substances by using microwave
  • Method for treating sludge and extracting organic substances by using microwave

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Embodiment 1

[0041] Such as figure 1 , figure 2 Shown: an integrated method for comprehensive utilization of sludge (the sludge is the sludge of a domestic sewage treatment plant in Tanggu, Tianjin, and the detection index of the sludge is shown in Table 1), comprising the following steps:

[0042] (1) Settling the activated sludge from the sewage treatment plant and entering the sludge thickening tank, and obtaining 80% moisture content sludge after plate and frame press filtration, adding the 80% moisture content sludge to the regulating tank, and adding the same weight water, adjust the moisture content of the sludge to 90%:;

[0043] (2) In the sludge regulating tank, after adjusting to pH=10 with 40% (weight percent) sodium hydroxide solution, add 0.6% lime of 90% water content sludge gross weight; stir and mix for 30 minutes, enter 2.45 GHz microwave reactor with a power of 15KW and a reaction time of 60 minutes. Then, it is cooled to 70-90°C by flash release, and the solid and li...

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Abstract

The invention provides a method for treating sludge and extracting organic substances by using microwave. The method comprises the following steps of: 1) adding an alkali solution into concentrated sludge from a secondary sedimentation tank of a sewage treatment plant in an adjusting tank, controlling the water content to be between 85 and 93 percent, controlling the pH value to be 8-11, and stirring and mixing for 10 to 30 minutes to obtain a sludge solution; 2) putting the sludge solution stirred and mixed in the 1) into a pressure container, and heating the sludge solution to the temperature of between 110 and 150 DEG C for 40 to 60 minutes by using a microwave generator of which the frequency is 915MHz to 2.45GHz to obtain a sludge mixed solution; and 3) cooling the sludge mixed solution in the 2) to the temperature of between 70 and 90 DEG C by flash evaporation, and separating solid and liquid. The method for extracting protein is quick, energy-saving and low in cost.

Description

technical field [0001] The invention relates to a sludge treatment technology, in particular to a method for extracting organic matter from sludge by microwave treatment. Background technique [0002] Activated sludge in sewage treatment plants is a by-product of sewage treatment. It has high water content and complex components. Influenced by industrial wastewater, there are often more toxic and harmful substances such as heavy metals, and improper treatment can easily cause serious secondary pollution. The ever-increasing amount of sludge produced is in sharp contradiction with the serious shortage of sludge treatment capacity and the serious backwardness of treatment methods. A large amount of wet sludge is transported out at will, simply landfilled or piled up, causing many cities to "sludge besiege". Sludge disposal has become an unavoidable urban environmental problem. [0003] According to the data released by the Ministry of Environmental Protection: In 2008, the n...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/18C07K1/14C05D7/00C04B38/02A62D1/02C09K17/00
Inventor 左健薛永海刘成林吴瑞华
Owner 北京神州朗泰低碳科技有限公司
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