A chemical mechanical pulp wastewater treatment system

Abstract

The invention relates to a chemimechanical pulp wastewater treatment system. The chemimechanical pulp wastewater treatment system comprises a wastewater regulation tank, a reinforcing floatation tank, an ozone oxidation and sedimentation tank, a cross-flow anoxic and anaerobic reaction tank, a perfect mixing aerobic tank, a secondary sedimentation tank and a backflow biological aerated filter tank, wherein the reinforcing floatation tank sequentially comprises a mud-sand region, a mixing region and a separation region from bottom to top; the ozone oxidation and sedimentation tank comprises an aerated mixing region and a sedimentation region; the cross-flow anoxic and anaerobic reaction tank comprises a facultative aerobic section, an anoxic section and an anaerobic section which are separated by baffle plates; the perfect mixing aerobic tank is provided with a water inlet pipe, a water distribution triangular cone and an aeration regulation and control system; and the backflow biological aerated filter tank comprises a lower flow region, an upper flow region and a sludge region. According to the chemimechanical pulp wastewater treatment system, wastewater enters the reinforcing floatation tank through the wastewater regulation tank, scum is removed, the wastewater enters the ozone oxidation and sedimentation tank, pollutants are oxidized and decomposed, and then the wastewater enters the cross-flow anoxic and anaerobic reaction tank and the perfect mixing aerobic tank to be subjected to anoxic, anaerobic and aerobic reactions, reacts and is filtered in the backflow biological aerated filter tank and is then reused.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a chemical mechanical pulp wastewater treatment system. Background technique [0002] Pollutants in chemical mechanical pulp wastewater mainly come from organic matter dissolved in the production process, residual chemicals and lost fine fibers. The composition is complex, and the biodegradability of wastewater is poor. It belongs to industrial wastewater that is difficult to be completely degraded by biochemical methods; Contains a large amount of suspended solids; has a large chroma, etc. It is difficult to meet the requirements of high efficiency, energy saving, low cost and environmental protection by using traditional physical, chemical and biochemical treatment processes to treat chemical mechanical pulp wastewater. Therefore, based on traditional physical, chemical and biochemical treatment processes, a new combination of improvement or innovation is carried o...

AI Technical Summary

Problems solved by technology

It is difficult to meet the requirements of high efficiency, energy saving, low cost and environmental protection by using traditional physical, chemical and biochemical treatment processes to treat chemical mechanical pulp wastewater. Therefore, based on traditional physical, chemical and biochemical treatment processes, a new combination of improvement or innovation is carried out. The research and development of the process has become a hot spot in the research of chemical mechanical pulp wastewater treatment

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