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Sludge separation treatment method

It is a kind of quality separation treatment and sludge technology, which is applied in the direction of sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc. It can solve the problems of affecting gas production, high sludge viscosity, and difficult mixing, and achieves low cost, ease of disposal

Active Publication Date: 2019-06-11
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

In order to reduce floor space and heating energy consumption, high-concentration sludge can be used as the input sludge for high-solids anaerobic digestion (HSAD), but this technology has the problems of high sludge viscosity, difficult stirring, and affecting gas production; overall , the organic matter degradation rate of sludge anaerobic digestion is about 35-50%, and the biogas output per unit organic matter (expressed as volatile solids, VS) is 750-1200L / kg

Method used

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  • Sludge separation treatment method

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Embodiment Construction

[0025] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.

[0026] Such as figure 1 , a preferred embodiment of the present invention provides a method for sludge quality treatment and disposal, comprising the following steps:

[0027] S1: transport the raw sludge to the low-temperature thermal hydrolysis reactor, and pass the reflux liquid generated in step S5 into the low-temperature thermal hydrolysis reactor, and obtain the hydrolyzed homogeneous sludge after the low-temperature thermal hydrolysis reaction;

[0028] Specifically, the raw sludge (dewatered sludge with a solid content of about 20%) is transported from the feed storage bin to the low-temperature thermal hydrolysis reactor, and the reflux liquid generated in step S5 is added to it to make the solid content of the mixture The rate is controlled at 8-12%, the temperature is controlled at 60-90° C., and stirred for 15-1...

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Abstract

The invention discloses a sludge separation treatment method. The method comprises the following steps: S1: conveying raw sludge into a low-temperature pyrohydrolysis reactor, introducing a backflow liquid generated in a step S5 into the low-temperature pyrohydrolysis reactor, carrying out a low-temperature pyrohydrolysis reaction to obtain hydrolyzed homogenized sludge; S2, conveying the homogenized sludge to a high-solid anaerobic digestion reactor to carry out a high-solid anaerobic digestion reaction, and discharging digested sludge; S3, conveying the digested sludge to a wet-type catalytic air oxidation reactor, adding a catalyst, and carrying out a wet-type catalytic air oxidation reaction to obtain mineralized sludge; S4, conveying the mineralized sludge to a dewatering device, andseparating the solid phase and moisture to separately obtain inorganic sludge and a separated liquid; and S5, carrying out deamination treatment on the separated liquid to obtain the backflow liquid,and conveying the backflow liquid to the low-temperature pyrohydrolysis reactor in the step S1. According to the method, coordinated distribution of substances and energy is realized, great reductionof the sludge can be realized at relatively low cost, and inorganic residues are convenient to dispose.

Description

technical field [0001] The invention relates to the field of solid waste treatment and resource utilization, in particular to a method for sorting and disposing of sludge. Background technique [0002] Municipal sewage treatment plants will discharge primary sludge and residual sludge during the biological treatment of sewage; these sludges have high moisture content, large volume, and complex components, and collect various pollutants in sewage, which need to be properly treated and disposed of. [0003] Among various sludge treatment technologies, anaerobic digestion can use functional microorganisms to gradually convert part of the organic matter in sludge into biogas, and recover energy while achieving sludge reduction, so it has been widely used. Among them, there are many types of anaerobic digestion technology, and single-phase low-concentration anaerobic digestion is generally used in the field of sludge treatment. In order to reduce the floor area and heating energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F11/04C02F11/08C02F11/121
CPCY02E50/30
Inventor 李欢
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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