Dyeing and printing wastewater can only be treated through a combination of processes. While developing these processes, it’s also crucial to achieve recycling and reuse, striving for zero wastewater discharge. (1) Conditioning: For wastewater with significant variations in water quality and quantity, the conditioning tank should have a longer retention
The selection of different wastewater pretreatment methods should be comprehensively considered based on the wastewater characteristics, treatment objectives, and subsequent process requirements. The following are common pretreatment methods suitable for the following scenarios: 1. Industrial wastewater contaminated with high concentrations of organic matter, suspended solids, and color (such as pharmaceutical
Conventional treatment: In the secondary treatment of urban sewage, the dosage of about 10-30 mg/L can meet the basic treatment needs according to the effective component of aluminum oxide. Special case: When the wastewater has high turbidity (such as more than 500 NTU) or contains heavy metals/organic matter, the dosage