How to deal with high concentration waste salt

How to treat high concentration saline wastewater? What are the difficulties of high concentration saline wastewater? These have been puzzling us, and are discussed below in the high concentration salt disposal technology.

1. Characteristics of high concentration saline wastewater

High concentration saline wastewater has high salt content, high COD, TDS hardness (TDS) up to 3000mgL, total hardness up to 1500mglL, COD up to 3000 mgl, and even contains heavy metals above 50pm.

2. Difficulties in the treatment of high-concentration saline wastewater

High water content, high salt content, difficult to treat. At the same time, the treatment of high-concentration saline wastewater will produce a large amount of concentrated brine, which can not be well treated by the existing technology. In the existing high salt treatment equipment, even if evaporation crystallization system is installed, such a large amount of concentrated brine cannot be crystallized due to the large amount of water after membrane filtration system, so only the concentrated brine of a large size can be discharged, which will cause serious pollution to the surrounding water body and increase the pressure of sewage capacity.

3. How to treat high-concentration saline wastewater

Generally, evaporation of high concentration saline wastewater is carried out, but there are three technical bottlenecks in the evaporation process of high concentration saline wastewater at present:

(1) The COD, ammonia nitrogen, alkalinity and salt content of the evaporated condensate water are high, which greatly reduces the service performance of the condensate water;

(2) The evaporator is seriously blocked by scale. Calcium, magnesium, heavy metal, chloride, carbonate and sulfate in high brine are the main substances causing scale formation and blockage, which makes the heat transfer effect of evaporator worse. It requires frequent shutdowns and cleaning, thus reducing productivity.

(3) From the beginning of the steam, the total energy consumption is high. The concentration of film before evaporation can greatly reduce the total energy consumption, but the film is easy to scale and clog. By improving the purification and desalting process of high concentration brine, the problems of serious scale formation in evaporation process of high concentration brine, serious consumption of evaporation equipment, high COD content of condensate water and high utilization rate of obtained condensate water are solved.

The above is the discussion of Jiangsu Blue Green Environmental Protection Technology Co., Ltd. on how to deal with high-concentration saline wastewater. I hope it can help you.