A treatment system for papermaking wastewater

Abstract

The invention discloses a papermaking waste water treatment system. The papermaking waste water treatment system comprises a buffer pool, an oblique filter screen, a grit chamber, a high-speed filtering pool, a broken ice condensation pool, a rotary absorption pool, an aeration basin, a regulating pool, a biochemical reaction pool, a secondary sedimentation pool, a detention pool, an artificial fish pond, a water storage pool, a mud sump, a belt filter press and the like. The temperature in the broken ice condensation pool is subzero 5-15 DEG C. The removal rate of chemical oxygen demand of papermaking waste water treated by the system is up to 97.9%, the total nitrogen removal rate is up to 96.3%, the removal rate of the five-day chemical oxygen demand is up to 95.9%, the removal rate of suspended matter is up to 98.6%, the chroma removing rate is 98.1%, and the turbidity removal rate is up to 99.8%.

Description

technical field [0001] The utility invention relates to a treatment system for papermaking wastewater, which belongs to the field of water treatment in environmental protection. Background technique [0002] At present, COD emissions in my country's paper industry wastewater discharge rank first among all types of industrial emissions, and the paper industry has the most serious pollution to the water environment. It is not only the primary issue of pollution prevention and control in my country's paper industry, but also the standard treatment of industrial wastewater in my country. primary issue. According to statistics, the discharge of industrial wastewater from papermaking and paper products at or above the county level in my country accounts for 18.6% of the total industrial discharge in the country, of which the amount of treatment discharges up to the standard accounts for 49.3% of the total discharge of wastewater from papermaking enterprises, and COD in the discharg...

AI Technical Summary

Problems solved by technology

In recent years, through many unremitting efforts, the water pollution prevention and control of the paper industry has achieved certain results. Although the output of paper and cardboard has increased year by year, the removal rate of COD in the discharged wastewater has decreased year by year.

It can be seen from this that the paper industry has preliminarily achieved the goal of “increasing production and reducing pollution”. However, about 50% of the wastewater discharged by the paper industry has not yet been treated up to the standard, and the task of wastewater pollution prevention and control is still very heavy.

[0003] In the pulping process of the paper industry, only the fiber part of the raw material is used, and about half of the organic matter in the raw material is dissolved into waste liquid and discharged, causing environmental pollution and waste of resources

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