Construction site vehicle washing wastewater treatment method

Abstract

The invention provides a construction site vehicle washing wastewater treatment method which comprises the following steps: S1, collecting construction site vehicle washing wastewater, feeding into aplate frame by a pipeline, filtering by the plate frame, and feeding vehicle washing wastewater filtered by the plate frame into a stirring reaction tank. By adopting the construction site vehicle washing wastewater treatment method provided by the invention, mud and sand in the vehicle washing wastewater can be thoroughly removed, colloid substances in the vehicle washing wastewater can be thoroughly removed, and the effluent is clear, that is, the SS (Suspended Solid) is less than 5mg / L, the turbidity is 0.3-3.0NTU (Number of Transfer Unit), and the visible depth is 3m or greater; a small floor space is taken, that is, the normal surface load of a settling pond is about 1.0m<3> / (m<2>.h), by adopting the mode, the surface load of the settling pond is up to 4-20m<3> / (m<2>. h), that is, thefloor space accounts for 1 / 4 or less than 1 / 4 of a common settling pond; due to addition of a magnetic crystal nucleus, the amount of a coagulant is reduced by 1 / 3, meanwhile, the magnetic crystal nucleus can be recycled, and the recycling ratio is up to 95% or greater; the sludge of the settling pond is low in water content (more dense), and the sludge discharge frequency can be reduced.

Description

technical field [0001] The invention relates to the field of car washing wastewater treatment, in particular to a method for treating car washing wastewater at a construction site. Background technique [0002] Car washing machine, also known as car washing station, is based on the requirements of municipal, road administration, construction committee, environmental protection committee, transportation and other departments to design high-pressure multi-directional washing equipment for the tire chassis of various engineering vehicles, controlled by computer software, can be It can automatically complete the work of flushing and sludge discharge, and the flushing water can be recycled. When working continuously, only a small amount of water needs to be added, so a lot of water resources can be saved. It is especially suitable for cleaning vehicles in and out of various construction sites, mining factories, cement products factories, coal mines, power plants, landfill plants,...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for treating waste water from washing vehicles on construction sites, which solves the problems of large amount of sludge, unstable water quality of incoming muddy water, easy blockage of high-precision filtration, and too large area occupied by normal sedimentation tanks.

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