A kind of method to improve sludge thermal hydrolysis efficiency
A technology of thermal hydrolysis and sludge, which is applied in the direction of biological sludge treatment and pyrolysis treatment of sludge, etc. It can solve the problems of unsatisfactory sludge stabilization effect, thermal efficiency of sludge thermal hydrolysis reactor, mass transfer and heat transfer equipment Difficulty in continuous operation, unstable conversion efficiency of sludge organic matter, etc.
Active Publication Date: 2021-05-04
上海利泽环保科技有限公司
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Problems solved by technology
[0004] At present, the following problems still need to be overcome in the industrial application of sludge thermal hydrolysis technology: (1) Due to the increase of viscosity, the partial dewatered sludge cannot be directly subjected to thermal hydrolysis pretreatment, and it still needs to be mixed with sewage or residual sludge with high moisture content. The sludge is further mixed to reduce the solid load of the thermal hydrolysis reactor; (2) The conversion efficiency of sludge organic matter is unstable and low, resulting in an unsatisfactory sludge stabilization effect; (3) Due to the unstable flow state of dewatered sludge, It brings many difficulties to the thermal efficiency, mass transfer and heat transfer of the sludge thermal hydrolysis reactor, and the continuous operation of the equipment.
Method used
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Embodiment 1-12
[0054] Embodiment 1-12 sludge lysis promoter is prepared in proportion, wherein 50 parts by weight of 30% lye (sodium hydroxide aqueous solution), 1 part by weight of rhamnolipid, 0.4 part by weight of high temperature resistant compound enzyme (phytase : high temperature resistant amylase=1:1), 3.5 parts by weight of adsorption deodorant (zeolite powder:diatomaceous earth=2:5).
[0055] When the above-mentioned batch sludge thermal hydrolysis is carried out, the sludge lysis promoter is added according to the addition amount in Table 1.
[0056] The sludge thermal hydrolysis treatment method of Comparative Examples 1-3 in Table 1 and Table 2 is the same as that of Examples 1-12, except that no sludge lysis accelerator is used.
[0057] Table 1
[0058]
[0059] Table 2
[0060]
[0061] At present, the moisture content of the sludge centrifuged from the sewage plant is usually about 80%. According to the existing thermal hydrolysis process, water is generally added to...
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Abstract
The invention discloses a method for improving thermal hydrolysis efficiency of sludge. The method comprises the steps of: mixing the sludge cell lysis accelerator with the dewatered sludge to carry out thermal hydrolysis of the sludge.
Description
technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a method for improving the efficiency of sludge high-temperature thermal hydrolysis process. Background technique [0002] Dewatered sludge is the main by-product produced in the sewage treatment process. It not only contains rich water, organic matter and microorganisms, but also may contain many harmful substances such as heavy metals that can cause environmental pollution. Therefore, improper treatment of sludge is likely to cause Secondary environmental pollution. At present, the research on sewage sludge treatment technology is mainly in three aspects: one is the pretreatment technology that promotes efficient dehydration of sludge and the dissolution of organic matter; the other is incineration and sanitary landfill technology that can realize the final disposal of sludge; the third is sludge Various forms of resource reuse technologies. [0003] Slud...
Claims
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IPC IPC(8): C02F11/10C02F11/02
CPCC02F11/02C02F11/10
Inventor 王健王晓春
Owner 上海利泽环保科技有限公司