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 the sewage after sludge treatment, wherein the enhanced micro-electrolysis adopts composite iron-carbon filler in acid The micro-electrolysis of sewage is carried out in the environment, and the chain electrolysis is at least two-stage electrolysis. The present invention adopts multi-stage chain type electrolysis to treat sewage, and the effluent can be directly discharged after reaching the third-level standard of the "Comprehensive Wastewater Discharge Standard" (GB 8978-1996), and the treatment method is efficient and simple, and the material cost is low and environment-friendly, with a high degree of automation High and adaptable, it can be used for sludge and sewage treatment under different water quality and water volume, and has good promotion 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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