Treatment system for sewage plant sludge

Abstract

The invention discloses a treatment system for sewage plant sludge. The system comprises sludge screening equipment, a sludge concentration tank, a microwave digestion tank, a sludge dehydration tank, a sludge deep dehydration tank, a sludge fermentation tank, a sludge drying tank, a sludge storage tank, a waste tank, a methane collecting tower, a dosing system, a deodorization tower and a sludge refining tower. Compared with the prior art, the sludge heat value can be about 2900-3000 kcal, the sludge treatment amount per day is 1000t / d, and the sludge moisture content is reduced to about 12%. The sludge concentration tank adopts a continuous gravity concentration tank, and the microwave digestion tank adopts an anaerobic digestion process; the sludge dehydration tank adopts a physical regulating method; the sludge fermentation tank adopts an aerobic fermentation process; and the sludge drying tank adopts a direct heating mode.

Description

technical field [0001] The invention relates to a treatment system for sewage plant sludge, which belongs to the field of solid waste treatment in environmental protection. Background technique [0002] Sludge is an accompanying organism produced in the process of sewage treatment. It is mainly composed of aerobic microorganisms, and includes solid substances such as sediment, fiber, and animal and plant residues mixed in sewage, as well as adsorbed organic matter, metals, germs, and insects. A complex of substances such as eggs. The composition of sludge varies widely, depending on the source of sewage, the nature and proportion of industrial sewage in the service basin, sewage treatment process and season. Usually, sludge contains mineral salts needed for plant growth and development (such as nitrogen, phosphorus, potassium, magnesium, sulfur, calcium and other basic elements) and various trace elements to maintain normal plant growth (such as: iron, manganese, zinc, Cop...

AI Technical Summary

Problems solved by technology

For large urban sewage treatment plants, due to the discharge of a large amount of industrial wastewater, the content of heavy metals such as zinc, copper, lead, and cadmium in the sludge is often high

In addition, because sludge usually has a high water content, it also has the characteristics of bulky, unstable, perishable, and unfavorable for transportation.

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