Sewage treatment method after sludge treatment

Abstract

The invention discloses a sewage treatment method after sludge treatment. The method adopts enhanced micro-electrolysis and multi-stage chain electrolysis to treat sewage after sludge treatment, the enhanced micro-electrolysis adopts a composite iron-carbon filler to carry out micro-electrolysis on the sewage in an acidic environment, and the chain electrolysis is at least two stages of electrolysis. According to the invention, after the multi-stage chain electrolysis is adopted to treat the sewage, effluent can be directly discharged after reaching three-stage standard of the Comprehensive Waste water Discharge Standard (GB 8978-1996), and the treatment method is efficient and simple, an adopted material is low in cost, environment-friendly, high in automation degree and strong in adaptability, and the sewage treatment method can be used for sludge sewage treatment under different water quality and water quantity, and has good popularization value.

Description

technical field [0001] The invention relates to a sewage treatment method after sludge treatment, belonging to the field of sewage treatment. Background technique [0002] At present, due to the increase of urban sewage treatment plants, most of the urban sewage treatment plants currently use biochemical processes to treat sewage, and a large amount of biochemical sludge will be generated during the treatment process. The water content of biochemical sludge is high, and the existence forms of water can be divided into two categories: capillary water, interstitial water, surface adsorption water, internal water and other bound water and free water (free water). Part of the free water and interstitial water in the sludge can be removed by means of filtration, gravity concentration, etc. However, since biochemical sludge is a suspension of organic particles as the main body, the particles are fine and colloidal, and have a great affinity with water. Under the action of the Bro...

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Problems solved by technology

[0004] During the treatment process, due to the complex composition of the sewage collected after sludge treatment, it was found in actual operation that the consumption of various drugs is much greater than that of conventional sewage treatment, especially the removal of COD and color in water based on the principle of forming a primary battery. When the temperature is high, the consumption of iron-carbon filler is huge, and the filler needs to be replenished frequently, and when the filler content is insufficient, it will also affect the effect of strengthening micro-electrolysis

Frequent addition of fillers not only requires a special person to be on duty, wasting time and energy, but also frequently adding new fillers will affect the flocculation and adsorption and precipitation formed by the existing primary battery, which will adversely affect the ongoing reaction

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