industrial sewage

Industrial sewage is wastewater generated from manufacturing and chemical processes. It differs from domestic sewage, which comes from homes and businesses, and storm sewage, which is rainwater runoff. Industrial wastewater often contains specific chemical compounds and can have a much higher biochemical oxygen demand (BOD) than domestic sewage, indicating a greater amount of organic material that consumes oxygen in receiving waters.123

Wastewater treatment systems are designed to remove impurities before discharge to protect public health and water quality. Treatment typically involves primary, secondary, and sometimes tertiary stages. Primary treatment removes solids, secondary treatment uses biological processes to break down organic matter, and tertiary treatment addresses specific pollutants like nutrients. The goal is to reduce suspended solids, BOD, and destroy pathogens.456