Integrated treatment method and system for sludge

A treatment method and technology of a treatment system are applied in the field of integrated treatment methods and systems of sludge, which can solve the problems of low degradation rate of organic matter, weak stability of high-temperature anaerobic operation, and wide area, and achieve high removal rate of organic matter, The effect of realizing sludge reduction and stabilization effect

Pending Publication Date: 2020-06-26
中国环境保护集团有限公司
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Problems solved by technology

However, there are many defects in the traditional anaerobic digestion system: first, the degradation rate of organic matter is low, generally less than 40% (calculated by VS), and the methane production rate is also low; secondly, the hydrolysis of complex polymers in sludge The rate is slow, resulting in a long hydraulic retention time HRT, generally 20-30d, resulting in a large-scale reactor and other facilities, high investment, and a large area; moreover, m

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  • Integrated treatment method and system for sludge

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Embodiment 1

[0028] This embodiment provides an integrated treatment system for sludge, the schematic diagram of which is as follows figure 1 As shown, including thermal hydrolysis system (abbreviated I-TH system), anaerobic digestion system (abbreviated II-AD) and thermal drying system (abbreviated III-TD system), wherein, thermal hydrolysis system includes homogeneous pulping Integrated machine 3, thermal hydrolysis reaction tank 4, pressure relief flash tank 5, grit chamber 6, heat exchanger 7 and output buffer tank 8; anaerobic digestion system includes conditioning tank 9 and anaerobic tank 10; heat drying The chemical system includes a mechanical centrifugal dehydrator 11 and a dehumidification and drying machine 12; wherein the homogeneous slurry integrated machine 3, the thermal hydrolysis reaction tank 4 and the pressure relief flash tank 5 are all equipped with agitators; the integrated treatment system also includes sewage Mud receiving bin 1, screw conveyor 2, water treatment s...

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Abstract

The invention provides a sludge integrated treatment method and system, the sludge integrated treatment method comprises pyrohydrolysis pretreatment and anaerobic digestion of sludge and heat drying treatment of biogas residue after anaerobic digestion, and the temperature of anaerobic digestion is 35-38 DEG C. Through combination of pyrohydrolysis pretreatment, medium-temperature anaerobic digestion and thermal drying treatment, the sludge with the water content of 20-30% can be obtained by treating the raw sludge. Meanwhile, the organic matter removal rate is high, the methane yield is high,the treatment period is short, and reduction, recycling and stabilization of the sludge are greatly achieved.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, and more specifically, to an integrated sludge treatment method and system. Background technique [0002] Sludge is a by-product of the sewage treatment process. It has the characteristics of high water content, fine particles, and light specific gravity. It mainly comes from the primary sedimentation tank and secondary sedimentation tank of the sewage treatment plant. The sludge has complex components and a large amount, which contains a large amount of organic matter, nitrogen and phosphorus, pathogenic microorganisms, parasite eggs and viruses, heavy metal ions and other substances. The organic matter in the sludge is perishable and produces stench, which is easy to breed mosquitoes and flies; nutrients such as nitrogen and phosphorus will flow into the surface or underground water body under the washing of rainwater, causing water pollution; untreated or substandard treated sludge is...

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Application Information

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IPC IPC(8): C02F11/18C02F11/04C02F11/127C02F11/13C02F11/147C02F101/20C02F101/30
CPCC02F11/04C02F11/127C02F11/13C02F11/147C02F11/18C02F2101/20C02F2101/30Y02E50/30
Inventor 黄智陈奕名杜兵曹剑叶黄明星邓玲马晓玲刘晓吉龙艳秋喻武
Owner 中国环境保护集团有限公司
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