Method for wall breaking and anaerobic drying treatment of remaining active sludge

Abstract

The invention discloses a method for wall breaking and anaerobic drying treatment of remaining active sludge. According to the method, remaining active sludge is fed into a wall breaking homogenization groove, and is mixed with a treatment agent; treatment is performed; the active sludge obtained after the treatment is subjected to osmotic pressure impact wall breaking; the wall-broken sludge is fed into a sludge anaerobic fermentation tank, and is subjected to anaerobic gas production; biogas is recovered, and the sludge after the anaerobic treatment is fed into a sludge dewatering machine, and is dewatered; and the obtained dewatered cake is dried to obtain dried sludge after molding treatment. With the method of the present invention, the water content of the remaining sludge can be reduced to less than 15%, the sludge volume can be substantially reduced, the drying energy consumption is self-supplied, and the dried sludge can be used as the further resource raw material or can be incinerated.

Description

technical field

[0001] The invention relates to a method for treating excess active sewage, which belongs to the field of environmental protection, and in particular to an anaerobic drying treatment method for excess sludge. Background technique

[0002] With the rapid development of my country's economy and the acceleration of industrialization and urbanization, a large amount of industrial wastewater and domestic sewage generated every year need to be treated urgently. Activated sludge process is currently the most widely used water treatment technology at home and abroad. While the demand for it is increasing, it will inevitably produce a large amount of excess sludge. Excess sludge contains a large number of toxic and harmful substances, such as parasite eggs, pathogenic microorganisms, bacteria, synthetic organic matter and heavy metal ions, etc. The resulting odor and organic pollution have become a major public hazard for urban environmental sanitation. Therefore, th...