High Salt Wastewater Treatment and Waste Salt Resource Regeneration System

1. The generation and harm of high salt wastewater

High salt wastewater refers to wastewater with a total salt content of at least 1% by mass. It mainly comes from chemical plants and the collection and processing of oil and natural gas. This type of wastewater contains various substances, including salt, oil, organic heavy metals, and radioactive substances. The generation pathways of saline wastewater are extensive, and the amount of water is increasing year by year. A large amount of high salt wastewater, if discharged directly or diluted, causes water resource waste on the one hand; On the other hand, it will have a bad impact on the environment, accelerate the eutrophication of Rivers and Lakes, cause the collapse of the soil ecosystem, produce stench, affect the water quality, change the color and visibility of the water body, and form a large number of suspended solids in the water body.

2. General treatment methods for high salt wastewater

Wastewater is first removed from large suspended particles before entering the regulating tank, and then separated by electrodialysis. Concentrated water enters the MVR for evaporation, while fresh water enters the anaerobic and aerobic biological treatment systems. Finally, after sedimentation in the settling tank, it is discharged from the discharge tank. Among them, both sedimentation sludge and MVR evaporation crystallization need to be outsourced for treatment.

However, under this process, the phase of MVR evaporated crystalline salt is poor, and in most cases, it must be treated as hazardous waste, with higher outsourcing costs. The problems of blockage and high energy consumption in the evaporation system also arise.

3. Jiangsu Haipu's waste salt regeneration process

Due to the high cost and energy consumption of treating high salt wastewater. Therefore, the resource utilization treatment of high salt wastewater can not only reduce treatment costs, but also benefit the recovery and utilization of salt in high salt wastewater.

At present, Jiangsu Haifan conducts special adsorption pretreatment on MVR influent to remove organic matter and color pollutants from the original wastewater before entering the evaporation system. In this way, the quality of MVR evaporated crystalline salt will be greatly improved, enhancing its recycling value and significantly reducing outsourcing costs. This process has been successfully applied to dozens of enterprises, such as the resource utilization project of benzoic acid wastewater and salt in a fine chemical enterprise in Shandong. Through our adsorption process, it has become the first enterprise in Shandong to convert waste salt into general solid waste after treatment.

Most industrial waste salt is mixed salt, and the future treatment process will no longer be limited to "disposal", but "resource utilization". Jiangsu Haipu welcomes free consultation.