Method for waste water precipitation treatment in construction

Abstract

The invention discloses a method for waste water precipitation treatment in construction. The method comprises the following steps of (1) precipitation pool building: a precipitation pool is separatedinto four regions including a first region, a second region, a third region and a fourth region in sequential adjacent arrangement; the adjacent regions are separated by separation walls, and waste water can go over the separation walls through overflowing to enter the next region; (2) primary physical treatment: building construction waste water decelerates in the first region and generates natural precipitation; (3) first-stage physical treatment: a flocculating agent adding device is arranged in the second region and is used for automatically adding flocculating agents; (4) second-stage chemical treatment: the third region is provided with an oxalic acid adding device for automatically adding oxalic acid; (5) discharging: under the condition that the waste water in the fourth region conforms to the discharge standard, the natural overflow discharge is performed. The method for waste water precipitate treatment in building construction has the advantages that the precipitation efficiency is high; the environment protection standard requirement is met; the adaptation capability on the waste water treatment is high; the waste water contaminant fluctuation change treatment requirement is met; the cost is low; the implementation is easy.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a method for sedimentation treatment of wastewater during construction, in particular to a method for rapid precipitation of construction (waste) water with a flocculant and rapid neutralization of oxalic acid. Background technique [0002] Construction wastewater is the sum of wastewater generated by various operations during construction in the construction industry. Depending on the construction process, it may contain turbid suspended solids, impurities, heavy metal ions, organic matter and other pollutants that are harmful to the environment. If these building construction wastewater are directly discharged into the natural environment, it will cause serious damage to the natural environment, threaten the ecological balance of aquatic organisms, and people's drinking water safety. Therefore, environmental protection laws and regulations require each construction ...

AI Technical Summary

Problems solved by technology

[0004] The following problems were found in the sewage treatment according to the current sedimentation method: First, when the construction (waste) water discharge is large and the volume of the sedimentation tank is small, the water flow in the tank is accelerated, the sedimentation time is shortened, and it cannot be stored for a long time, resulting in a sedimentation effect. It is not obvious or even has no effect; the second is that the strong alkalinity in the sewage cannot be treated by precipitation, and the effluent quality is still rich in alkalinity, and the pH value is much higher than the 6-9 stipulated by the environmental protection department.

Obviously, whether it is to build a larger wastewater sedimentation tank in advance or to suppress the construction quality and reduce wastewater discharge, it is very unfavorable to the actual progress of the construction.

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