Wastewater treatment system and wastewater treatment process

Abstract

The invention relates to the technical field of water treatment, and particular provides a wastewater treatment system and a wastewater treatment process. The wastewater treatment system includes: anoptional homogenization pond, an oxidation pond, an integrated pretreatment pond, an artificial wetland unit and an ecological treatment unit connected in sequence; and the ecological treatment unit includes an ecological floating island. According to the wastewater treatment system, an organic matter which is difficult to biochemically degrade in wastewater can be effectively degraded, the nitrogen and phosphorus content is effectively reduced, effluent water quality can at least meet the Class IV standard of the "surface water environmental quality standard", and effluent water can be directly discharged into a river without causing bad influences on water quality of the river.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a wastewater treatment system and a wastewater treatment process. Background technique [0002] With the rapid development of petrochemical, plastic, synthetic fiber, coking, printing and dyeing industries, various wastewater containing a large amount of refractory organic pollutants has increased accordingly. After years of rectification, these wastewater can basically meet the discharge standards. However, there is a big gap between the water quality standards of wastewater discharged into the river and the water quality standards of the river. For example, the discharge of papermaking wastewater implements the "Pulp and Paper Industry Water Pollutant Discharge Standard", COD (Chemical Oxygen Demand, chemical oxygen demand ) is 100mg / kg, while the general river water quality implements the Class IV standard of the "Surface Water Environmental Quality Standard", and the ...

AI Technical Summary

Problems solved by technology

However, there is a big gap between the water quality standards of wastewater discharged into the river and the water quality standards of the river. For example, the discharge of papermaking wastewater implements the "Pulp and Paper Industry Water Pollutant Discharge Standard", COD (Chemical Oxygen Demand, chemical oxygen demand ) is 100mg / kg, while the general river water quality implements the Class IV standard of "Surface Water Environmental Quality Standards", and the COD is 30mg / kg

Therefore, a large amount of waste water flows into the river, which exceeds the self-purification capacity of the river, resulting in the situation that the water quality of the river is not up to standard.

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