Zero sewage discharge equipment

Zero discharge of sewage is generally aimed at the treatment of heavily polluted industrial or domestic sewage. In some areas, environmental protection requirements require zero discharge to avoid polluting surface water bodies.

Generally, zero discharge of industrial wastewater can be classified into the following situations:
1. The wastewater to be treated has good biochemical properties and does not require high water quality for reuse, such as papermaking and pulp making, coal mine yellow mud grouting, coking and extinguishing, etc. The main treatment process is "pretreatment+coagulation sedimentation+biochemical treatment";
2. The biochemical properties of the wastewater to be treated are good or good, and the requirements for water quality and ion content are high for reuse water, such as greening, underground firefighting, process reuse, etc. The main treatment process is "pretreatment+coagulation sedimentation+biochemical treatment+membrane treatment process";
3. The biochemical properties of treated wastewater are poor, and the requirements for water quality and ion content in recycled water are high. The main treatment processes are "pretreatment+advanced oxidation+membrane treatment process" or "pretreatment+membrane treatment process".