A papermaking wastewater advanced treatment system

Abstract

The invention relates to a paper-making waste water deep processing system. The paper-making waste water deep processing system comprises a waste water adjusting pond, an oxidizing reaction settling pond, a baffling type anoxia and anaerobism reaction pond, an aerobiotic contact oxidation pond, a secondary sedimentation pond and a sand filter pond. The oxidizing reaction settling pond comprises a mixing stirring area and a settling area. The baffling type anoxia and anaerobism reaction pond comprises an aerobic section, an anoxic section and an anaerobic section, all of which are divided by baffling plates. The aerobiotic contact oxidation pond is provided with a water inlet pipe, a water distribution triangular cone, padding and an aeration regulation and control system. The amount and quality of waste water are adjusted through the adjusting pond, then the waste water enters the oxidizing reaction settling pond, the pollutant is oxidized and decomposed, anoxia, anaerobism and aerobiotic reaction is carried out on the waste water after the waste water enters the baffling type anoxia and anaerobism reaction pond and the aerobiotic contact oxidation pond, and the waste water is deposited and filtered to reach the standard to be discharged.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an advanced treatment system for papermaking wastewater. Background technique [0002] In recent years, with the rapid development of the economy, the paper industry has also developed rapidly. Due to the large amount of sewage discharged in the papermaking process and the large amount of pollutants produced, the problem of environmental pollution has become increasingly prominent, and the treatment of papermaking wastewater has become the focus of attention. [0003] The methods of papermaking wastewater treatment include: physical method, chemical method, physicochemical method, biochemical method, etc. Physical methods mainly include sedimentation method, filtration method, air flotation method, etc., and the main treatment objects are solids in water. Chemical methods mainly include ozone oxidation method, photocatalytic oxidation method, ultrasonic air method, ...

AI Technical Summary

Problems solved by technology

However, the use of biochemical treatment technology to treat papermaking wastewater has its own defects. Most of the colored lignin fragments and their derivatives in wastewater are difficult to be degraded by microorganisms in ordinary activated sludge; the degradation effect on organic chloride is poor; COD removal The rate is not ideal; the removal effect of wastewater chroma is poor, and the treated effluent is still very dark in color, which seriously affects the transmission of sunlight in the receiving water body and hinders the growth and reproduction of aquatic organisms; follow-up physical or physical and chemical treatment measures are required, increasing Infrastructure and operating costs; the treatment effect is greatly affected by the weather, temperature and region; the process operation control is complicated, some biochemical processes take a long time to debug, and the effluent quality is not stable, etc.

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