Alternating type cascade treatment method for high-salinity wastewater

Abstract

The invention provides an alternating type cascade treatment method for high-salinity wastewater. The alternating type cascade treatment method comprises the following steps that the high-salinity wastewater enters and fills a first pollutant removal zone; a motor system rotates by 90 degrees, and then high-salinity wastewater filling is carried out on the next pollutant removal zone again; after the rotation is repeated twice, high-salinity wastewater in the first pollutant removal zone is discharged, and cleaning is carried out; and the steps are repeated to complete the uninterrupted removal of the salts and the heavy metal ions in the high-salinity wastewater. According to the method, four pollutant removal subareas sequentially work, and an alternating cascade system water conveying system comprises a water inlet distribution channel and a cleaning water distribution channel which are arranged on the outer wall of the first pollutant removal zone and the outer wall of a third pollutant removal zone correspondingly; a purified water outlet pipe and a cleaning water outlet pipe are located in a water outlet bin and have the same water outlet direction from top to bottom in the axial direction, multi-point water inlet is achieved through cascade water distribution, the water distribution uniformity is improved, and the treatment effect of the system can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to an alternating cascading treatment method for high-salt wastewater. Background technique [0002] As the main component of industrial production wastewater, high-salt wastewater has become a major environmental protection problem faced by industrial development and wastewater treatment at the present stage due to its large discharge volume and high difficulty in treatment. Substandard discharge of high-salt wastewater will not only waste salt and water resources, but also cause serious environmental pollution. Since salinity is an important environmental factor in the water environment, it has a direct or indirect impact on aquatic organisms, growth and reproduction. When the salinity of the water environment increases sharply, it will lead to the osmotic balance between the aquatic species and its living environment, causing dehydration of the cell...

AI Technical Summary

Problems solved by technology

Biological method is a method of treating wastewater by using the metabolism and reproduction of microorganisms themselves. However, heavy metals and other substances in high-salt wastewater will destroy the life structure of microorganisms, inhibit their growth and reproduction, and even lead to cell inactivation.

The chemical method is to deal with chemicals, which is costly and will cause secondary pollution

The physical method separates some pollutants from the wastewater system by physical means such as adsorption, flocculation, coagulation, etc. Compared with the above two methods, this method is more feasible, but there are still the following problems to be solved: ① existing technology adsorption or After filtration, it needs desorption or backwashing, so it can only run intermittently. Usually, several parallel processes are set to run alternately. The essence is still intermittent operation, which increases the initial investment and operating costs; ②The quality of the adsorbent is large, which increases the total weight of the equipment. Thereby increasing the operating costs such as power consumption; ③The existing adsorbent has insufficient adsorption effect

As a new type of lightweight material, hydrogel has a good adsorption effect on pollutants, but its application in the field of high-salt wastewater treatment has rarely been reported.

Images