By using the technique of physical treatment such as filtration, sedimentation, or making use of technical microbiology in lead-treated organic eating in dirty water to reduce it.
The technique may be used in physical therapy, such as filtering the precipitate. The techniques of microbiology in the microbes eat organic matter in water to reduce dirt into it.
The physical therapy techniques such as filtration, the precipitation. Or the use of microbiological technique of microorganism eat organic in water to reduce contamination down.