System and method for treating sludge with efficient recycling and low pollution emission

A sludge treatment and recycling technology, applied in sludge treatment, biological sludge treatment, chemical instruments and methods, etc., can solve problems such as the reduction of organic matter concentration, and achieve the reduction of organic matter content, high reduction efficiency, and ammonia nitrogen concentration. reduced effect

Active Publication Date: 2014-11-19
广州谦宇电力科技有限公司
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Problems solved by technology

During the oxidation of ammonia nitrogen to nitrite under aerobic conditions, some organic matter will ...

Method used

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  • System and method for treating sludge with efficient recycling and low pollution emission

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with embodiment.

[0033] see figure 1 , the technical solution adopted by the system of the present invention is: comprising a thermal hydrolysis tank 1 for thermal hydrolysis of sludge, a steam pipe 16 for heating sludge is arranged in the thermal hydrolysis tank 1, and on the thermal hydrolysis tank 1 Pressure gauge 15 is also provided, the sludge inlet of thermal hydrolysis tank 1 is connected to sludge pipe 17, the sludge outlet of thermal hydrolysis tank 1 is connected with the inlet of primary radiator 2, and the outlet of primary radiator 2 is connected with The sludge inlet of the anaerobic fermentation tank 4 is connected, the sludge outlet of the anaerobic fermentation tank 4 is connected with the inlet of the secondary radiator 6, and the sludge outlet of the secondary radiator 6 is connected with the anammox tank 9 , the sludge outlet of the anammox tank 9 is connected with the inlet of t...

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Abstract

The invention relates to the field of sludge treatment and in particular relates to a system and a method for treating sludge with efficient recycling and low pollution emission to reduce the ammonia nitrogen concentration of deaminated sludge, reduce the organic matter consumption, increase the biogas yield and reduce the pollutant emission in sludge treatment. The invention adopts the technical scheme as follows: the method comprises the following steps: thermally hydrolyzing the sludge, cooling, performing anaerobic fermentation to generate biogas, cooling the fermented sludge, mixing with a nitrite solution, deaminating in an anaerobic ammonia oxidation tank, circularly returning one part of the deaminated sludge to an anaerobic fermentation tank to reduce the ammonia nitrogen concentration of the anaerobic fermentation tank and prevent the inhibition effect of high-concentration ammonia nitrogen on the biogas, and performing anaerobic fermentation on organic matters in the part of the deaminated sludge to generate more biogas; dehydrating another part of the deaminated sludge to greatly reduce the ammonia nitrogen concentration and the organic matter content of the dehydrated sludge and filter liquor. The system and the method have the advantages of efficient recycling and low pollution emission in sludge treatment, and have high economic and environmental benefits.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge treatment system and method with high-efficiency resource utilization and low pollution discharge. Background technique [0002] (1) Sludge anaerobic fermentation treatment technology [0003] In recent years, the improvement of China's environmental protection requirements has led to the rapid development of the sewage treatment industry, and the sewage treatment capacity, treatment volume, and sludge production have all increased rapidly. The composition and chemical properties of sludge are complex, including organic matter, plant nutrients, etc., as well as toxic and harmful substances such as heavy metals, pathogens, and persistent organic matter. Without effective treatment, sludge can easily cause secondary pollution to groundwater, soil, etc. , so that the environmental benefits of sewage treatment facilities are greatly reduced. Sludge treatment should meet the...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/10C02F11/04C02F11/12
CPCY02E50/30
Inventor 李志伟何秀锦
Owner 广州谦宇电力科技有限公司
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