Sludge treatment method for sewage plants

Abstract

The invention discloses a sludge treatment method for sewage plants. Sludge, after sequentially passing through a sludge sieve apparatus, a sludge concentration pool, a microwave digestion pool, a sludge dehydration pool, a sludge deep-dehydration pool, a sludge fermentation pool, a sludge drying pool, a sludge storage pool, a waste tank, a methane collecting tower, a chemicals feeding system, a deodorization tower, and a sludge refining tower, is completely treated. Compared with the prior art, by using the treatment method disclosed by the invention, the calorific value of sludge is about 2900-3000 kcal, 1000t / d of sludge can be treated per day, and the moisture content of the sludge is reduced to about 12%. The sludge concentration pool is a continuous gravity concentration pool; the microwave digestion pool is implemented by using an anaerobic digestion process; the sludge dehydration pool is implemented by using a physical conditioning method; the sludge fermentation pool is implemented by using an aerobic fermentation method; and the sludge drying pool is implemented in a direct heating mode.

Description

technical field [0001] The invention relates to a treatment method 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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