Problems in the treatment of high-salt wastewater

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Problems in the treatment of high-salt wastewater. Zero-liquid discharge and resource utilization of high-salt wastewater represent an inevitable trend in its treatment. At present, although various companies are actively equipping themselves with evaporation crystallization units to treat high-salinity wastewater, many problems still exist. First, the reverse osmosis concentrate flows directly into the evaporator, resulting in high evaporation volumes and high energy consumption. Second, current pretreatment technologies are unable to completely remove various organic substances such as large heterocyclic compounds from the water, which means that what is obtained in the evaporation and crystallization process is not crystalline salt but rather viscous sludge. Third, even after thorough treatment, with most of the water recovered and crystalline salt obtained, this salt is actually a mixed salt; it cannot be reused as a resource and must instead be treated as hazardous waste. Hebei Yunhao Lao Zhang 15830976988