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Treatment device and treatment method for pyrohydrolysis sludge anaerobic digestion liquid

A technology of anaerobic digestion and treatment device, applied in heating water/sewage treatment, water/sludge/sewage treatment, water/sewage treatment, etc. To achieve the effect of good cleaning and recovery, high water quality and energy saving

Pending Publication Date: 2021-03-09
BEIJING DRAINAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the difficult problem of thermal hydrolysis sludge anaerobic digestion solution

Method used

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  • Treatment device and treatment method for pyrohydrolysis sludge anaerobic digestion liquid
  • Treatment device and treatment method for pyrohydrolysis sludge anaerobic digestion liquid
  • Treatment device and treatment method for pyrohydrolysis sludge anaerobic digestion liquid

Examples

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Effect test

Embodiment 1

[0066] This embodiment provides a treatment device for thermally hydrolyzed sludge anaerobic digestion liquid, such as figure 1 As shown, the treatment device includes an independent or simultaneous forward osmosis unit, a high salt concentration unit 8, a water product tank 17 and a PLC control unit;

[0067] The high-salt concentration unit 8 is used to dynamically circulate the membrane treatment process of the forward osmosis unit;

[0068] The forward osmosis unit includes a raw material tank 1, a first filter 2, an infusion pump 3, a circulation pump 4, an FO membrane 5, a draw liquid tank 6 and a liquid level sensor 7; the two ends of the raw material tank 1 are respectively connected to There are a raw material liquid outlet pipe 9 and a raw material liquid concentrated water circulation pipe 10, the other end of the raw material liquid outlet pipe 9 and the other end of the raw material liquid concentrated water circulation pipe 10 are respectively connected to the ra...

Embodiment 2

[0073] This embodiment provides a treatment method for anaerobic digestion solution of thermally hydrolyzed sludge, which uses the treatment device for anaerobic digestion solution of thermally hydrolyzed sludge described in Example 1, such as figure 1 shown, including the following steps:

[0074] S1: Inject the thermally hydrolyzed sludge anaerobic digestion solution into the raw material tank 1, inject the drawing solution into the drawing solution tank 6, and turn on the infusion pump 3 and the circulation pump 4 After the thermal hydrolysis sludge anaerobic digestion liquid is filtered through the first filter 2, forward osmosis is carried out on the raw material liquid side of the FO membrane 5, and permeation is obtained on the draw liquid side of the FO membrane 5. Passing through the liquid, the raw material liquid concentrated water is obtained on the raw material liquid side of the FO membrane 5, and the raw material liquid concentrated water flows back into the raw...

Embodiment 3-7

[0087] The drawing solution of Example 3-7 is a sodium chloride solution, and the concentration of the sodium chloride is 0.5mol / L, 1.0mol / L, 2.0mol / L, 3.0mol / L, 4.0mol / L in sequence;

[0088] The flow rate of the thermally hydrolyzed sludge anaerobic digestion solution injected into the raw material tank is 1.5L / min;

[0089] The temperature of the thermally hydrolyzed sludge anaerobic digestion solution is 25°C;

[0090] Other steps and conditions are identical with embodiment 2.

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Abstract

The invention belongs to the technical field of pyrohydrolysis sludge anaerobic digestion liquid treatment, and discloses a treatment device and treatment method for pyrohydrolysis sludge anaerobic digestion liquid. The treatment device comprises a forward osmosis unit, a high-salt concentration unit, a water production tank and a PLC control unit which operate independently or simultaneously, thehigh-salt concentration unit is used for enabling the membrane treatment process of the forward osmosis unit to be carried out dynamically and circularly; and the forward osmosis unit comprises a rawmaterial liquid tank, a first filter, a liquid conveying pump, a circulating pump, an FO membrane, an absorbing liquid tank and a liquid level sensor. According to the treatment device and treatmentmethod of the invention, the forward osmosis unit and the high-salt concentration unit can be operated at the same time, so that the membrane treatment process of the forward osmosis unit is carried out dynamically and circularly. And the concentration rate of a concentrated draw solution can be up to 80%. And the problem that the pyrohydrolysis sludge anaerobic digestion liquid is difficult to treat is solved.

Description

technical field [0001] The invention belongs to the technical field of anaerobic digestion liquid treatment of thermal hydrolysis sludge, and in particular relates to a treatment device and method for anaerobic digestion liquid of thermal hydrolysis sludge. Background technique [0002] Sludge thermal hydrolysis pretreatment technology is an effective sludge pretreatment method that improves sludge dewatering performance, reduces sludge volume, and produces a higher level of organic matter destruction, which is almost twice that of biogas production. However, the thermal hydrolysis pretreatment technology of sludge will also lead to Mandela reaction and produce refractory polyammonia, which makes the subsequent anaerobic digestion process sludge difficult to treat. At present, the commonly used anaerobic digestion solution treatment method of thermal hydrolysis sludge is mainly biological treatment process, but this requires very large factory facilities and is heavily depen...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F11/10C02F11/04
CPCC02F1/445C02F1/001C02F1/442C02F1/08C02F11/10C02F11/04
Inventor 王佳伟邱浩然常江刘国梁张志强杨炼王浩孙冀垆
Owner BEIJING DRAINAGE GRP CO LTD
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