Method for accelerating sludge settling, concentrating and dehydrating by vibration

Abstract

The invention relates to sludge treatment in sewage treatment, including a method for settling, concentrating and dehydrating sludge and a method for settling, concentrating and dehydrating sludge in a similar lake and river desilting process. In the process of settling, concentration and dehydrating the sludge, the sludge is uniformly distributed in the water to form a relatively stable state, so the mud-water separation is hard to happen. The method adopted by the invention comprises that: a vibration source for generating vibration on the sludge is added to the sludge in the process of natural settlement and concentration of the sludge and mechanical concentration and dehydration of the sludge; and a vibration force with the same direction as the gravity or the extrusion force is generated by a vibration device and breaks the relatively stable state of the sludge and water in the mixture of the sludge and water so as to accelerate the mud-water separation and speed up the sludge settlement, concentration and dehydration.

Description

technical field [0001] The invention relates to sludge treatment in sewage treatment, including methods for sludge sedimentation, concentration, and dehydration, as well as methods for sedimentation, concentration, and dehydration of sludge in the process of dredging lakes and rivers. By adopting the method in this invention, the effects of sedimentation, concentration and dehydration of sludge are improved. Background technique [0002] Activated sludge method is currently the most widely used sewage biological treatment technology in the world, but it has always had a big disadvantage, that is, it will produce a large amount of excess sludge. The amount of residual sludge generated is generally 0.3% to 0.5% of the sewage treatment capacity (calculated with a water content of 97%), which is an astonishing amount. At the same time, the investment and operating costs of sludge treatment are huge, accounting for 25% to 65% of the investment and operating costs of the entire s...

AI Technical Summary

Problems solved by technology

In the current sludge treatment process, the water content of the sludge after sedimentation, concentration and mechanical dehydration is generally above 80%, which cannot meet the requirements for sanitary landfill and incineration of sludge

[0003] In the dredging of polluted sediments of lakes and rivers, a large amount of sludge with high water content will also be produced. Generally, a storage yard is used to naturally settle and concentrate these sludges, and the treatment of these sludges will cost a lot of money. Venue and time, but also requires a lot of costs

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