High-efficiency sludge conditioning and dehydrating method

A sludge conditioning and sludge technology, which is applied in biological sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problem of poor sludge dewatering performance, high cost, Poor stability and other problems, to achieve the effect of improving dehydration effect, stable material properties, and mild reaction conditions
CN110467332AInactive Publication Date: 2019-11-19BEIJING FORESTRY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING FORESTRY UNIVERSITY
Publication Date
2019-11-19
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a sludge conditioning-horizontal electric field dehydration method. The method comprises the following main steps: (1) carrying out ultrasonic treatment on sludge; (2) adjusting the temperature and pH value of the sludge; (3) adding thiobacillus, siderite and persulfate into the sludge, carrying out uniform mixing, and then performing a reaction for a certain period of time; and (4) introducing a mixture obtained in the previous step into a horizontal electric field for dehydration. According to the invention, ultrasonic damage of microbial cells and promotion of an oxidation reaction of siderite with persulfate via thiobacillus are combined together, so the generation of sulfate radical free radicals is activated, a Fe (II) redox cycle is formed, and a sludge structure is disintegrated; the horizontal electric field is cooperatively used for dehydration; and thus, respective advantages are give to full play, synergistic effect is generated, and the moisture content of the conditioned sludge is reduced to 50-70%. The conditioning method is clear in steps and easy to operate, avoids generation of excessive <Fe> due to feeding of excessive siderite, saves cost, and has obvious dehydration effect and no secondary pollution.
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Description

technical field

[0001] An efficient sludge conditioning and dehydration method belongs to the technical field of environmental protection. Background technique

[0002] In my country, due to the rapid development of society, economy and urbanization, municipal wastewater treatment plants (WWTPs) produce a large amount of sludge, and the sludge production is expected to exceed 60 million tons / year by 2020. The remaining sludge contains a large number of pathogenic bacteria, heavy metals and organic pesticides, which will bring harm to environmental quality and human health. The treatment and disposal of sludge has become a serious environmental problem. The "Water Pollution Prevention and Control Action Plan" promulgated by my country in 2015 specifically pointed out the need to promote sludge treatment and disposal. The sludge generated by sewage treatment facilities should be reduced, stabilized, harmless and recycled. How to effectively reduce Sludge moisture content is a...

Claims

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