Treatment process and system of nutrient self compensation and difficult-to-degrade industrial wastewater

Abstract

The invention discloses a treatment process and a treatment system of nutrient self compensation and difficult-to-degrade industrial wastewater. The treatment process comprises the steps that the difficult-to-degrade industrial wastewater is input into a hydrolysis digestion pool through a water inlet passage, the pH value in the hydrolysis digestion pool is regulated so that the pH value in the hydrolysis digestion pool is controlled to be in a range of 7 to 8.5; the industrial wastewater treated by the hydrolysis digestion pool sequentially enters a solid-liquid separation pool, a biological treatment pool and a secondary sedimentation pool to be treated; and one part of sludge separated by the solid-liquid separation pool and sludge concentrated by a concentrating pool enter the hydrolysis digestion pool. The treatment process and the treatment system of the difficult-to-degrade industrial wastewater have the advantages that the self compensation of nutrient substances of active sludge biological treatment can be realized, in addition, the rest sludge quantity generated by the system can be greatly reduced, the treatment capability of the system is improved, and meanwhile, the sludge treatment and disposition cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of water treatment and relates to a wastewater treatment process, in particular to a treatment process for refractory industrial wastewater; meanwhile, the invention also relates to a treatment system for nutrient self-compensation refractory industrial wastewater. Background technique [0002] With the rapid development of urbanization and industrialization, the improvement of environmental governance requirements in towns and industrial parks and the improvement of sewage treatment systems, my country's sewage treatment capacity is increasing day by day, and the amount of sewage plant sludge that needs to be treated is also increasing rapidly ( According to statistics, the sludge produced in my country every year has reached more than 100 million tons). Due to the special nature of sludge, it not only has a high water content, is perishable, and emits a strong odor. The sludge also contains organic substanc...

AI Technical Summary

Problems solved by technology

After hydrolysis, the carbon source nutrients in the sewage that can be effectively used by microorganisms in the biological treatment stage of the activated sludge method are reduced, which affects the treatment effect of the activated sludge section.

In addition, the above-mentioned conventional scheme requires a large amount of dewatered sludge, which increases the investment in sludge treatment and disposal.

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