Multi-stage oxidization treatment technology for sludge

Abstract

The invention discloses a multi-stage oxidization treatment technology for sludge. The multi-stage oxidization treatment technology comprises the following steps: (1) feeding the sludge into an adjustment basin, and adding water for dilution; (2) feeding the diluted sludge into all stages of oxidization reaction basins in sequence for multi-stage oxidization reaction; (3) feeding the sludge subjected to oxidization reaction into a settling basin, and leaving to stand for layering to form dross, supernate and sediments; (4) performing pressure filtering and dewatering on the dross and the sediments to prepare sludge cakes, and returning the supernate into a water plant. According to the multi-stage oxidization treatment technology, walls of cells can be broken, so that microorganisms and germs in the sludge can be effectively subjected to wall breakage, and thus water in the cells can be released, and dewatering is facilitated; after the sludge is made into the sludge cakes, the moisture content is reduced to about 55 percent, so that the weight of the sludge cakes is greatly reduced, and the delivery cost of the sludge cakes is reduced; moreover, a complex group in the sludge can be opened, and macromolecular organic matters can be effectively decomposed and bonds of which can be broken, so that the biodegradability is obviously improved; non-toxic and harmless gas such as carbon dioxide and nitrogen is released, and the multi-stage oxidization treatment technology is clean and environment-friendly.

Description

Technical field [0001] The invention involves the field of sewage treatment, especially a method of oxidation treatment of sludge. Background technique [0002] In recent years, as the country attaches more and more environmental attention, pollutant emissions have become increasingly strict.According to the numbers provided by the State Administration of Environmental Protection of China, currently China emits about 40.1 billion M 3 There are more than 400 urban sewage treatment plants that have been completed and operated, with a daily processing capacity of 25.34 million m 3 EssenceAccording to the 0.3 % ~ 0.5 % of the amount of sludge output (97 % at the water content), the output of the sludge of the urban sewage plant in China is 760,200 m 3 / d and 126,700 m 3 / D (97 % at the water content).Therefore, while China has continued to make progress in sewage management, it will face huge sludge treatment and disposal pressure, and research on sludge reduction treatment is very m...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the unsatisfactory treatment effect of the existing sludge treatment method, and to provide a sludge multi-stage oxidation treatment process with good dehydration effect

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