Deep dewatering treatment method for co-treatment of beer sludge and beer waste liquids

Abstract

The invention relates to the technical field of sewage sludge treatment, in particular to a deep dewatering treatment method for co-treatment of beer sludge and beer waste liquids. The method comprises steps as follows: step (A), production wastewater of a beer factory is collected by a water collecting well and treated by a wastewater treatment system, and purified water and the beer sludge are obtained; step (B), the beer sludge and the beer waste liquids are mixed in a concentration pond to form concentrated sludge; step (C), the concentrated sludge is subjected to flocculation and concentration separation, and primary sludge and primary wastewater are obtained; step (D), the primary sludge is chemically modified, and modified sludge is obtained; step (E), the modified sludge is pressed, filtered and dewatered in a multi-disk screw press, and secondary sludge and secondary wastewater are prepared; step (F), the primary wastewater and the secondary wastewater flow back to the water collecting well and are mixed with the production wastewater, the mixture continues to enter the wastewater treatment system and is discharged until meeting the standard. By means of deep dewatering treatment method for co-treatment of the beer sludge and the beer waste liquids, the beer sludge and the beer waste liquids can be treated simultaneously, wastewater is circularly treated, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of sewage sludge treatment, in particular to a method for treating beer sludge in cooperation with advanced dehydration of beer waste liquid. Background technique [0002] Sludge is a product in the process of sewage treatment. Generally, the treated sludge (ie dewatered sludge) discharged from urban sewage treatment plants is a semi-solid substance with a water content of 75-85%, mainly composed of organic debris, bacterial cells, inorganic It is composed of particles, colloids and agents used for flocculation, which is a complex mixture. Dewatered sludge is rich in organic matter, salt, a large amount of phosphorus, nitrogen and other substances in sewage, as well as toxic and harmful substances such as virus microorganisms, parasite eggs, and heavy metals. Land, and with the infiltration of leachate and the spread of bacteria in the air, it will cause considerable harm to the ecological environment. [...

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Problems solved by technology

The traditional physical method uses machinery to mechanically dehydrate the modified sludge. According to the modification technology and the use of machinery, the moisture content of the sludge after pressure filtration can be effectively reduced, such as using a bag machine, centrifuge or The screw stacking machine can be reduced to less than 80%, such as using a plate and frame machine and a high-pressure steel belt filter press can be reduced to 40%-60%; the traditional chemical method is to add oxidants, coagulants, flocculants, and filter aids. Such as chemical agents, change the dehydration characteristics of sludge to make it easy to dehydrate, the biological method needs to cultivate specific biological flora, and then put the biological flora into the water that needs to be treated, and use the physiological reaction of the biological flora to purify the sewage. However, the initial research on the cultivation of biological flora requires a lot of investment and takes a long time. The living environment of the cultivated biological flora is harsh and difficult to use. Therefore, the above methods cannot be applied in practice. Therefore, it is necessary to develop a beer sludge synergistic beer Waste liquid deep dehydration treatment method

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