they also generate a lot of wastewater—as much as 5 gallons for every gallon of filtered water, the EPA says. For lead, chlorine, and other contaminants, standard under-sink filters that meet ...

When you flush the toilet, or water runs down the drain from sinks or the laundry ... the soil in the drainfield filters the wastewater, and natural bacteria and microbes break down the waste.

BEIJING, Jan. 8 (Xinhua) -- Scientists have developed an innovative filter membrane that offers new possibilities for treating high-salinity wastewater. The study, conducted by researchers from ...

A septic system is designed to filter wastewater. It consists of a large septic tank, distribution box, baffles, and drain field that are buried underground. The drain field is also called a ...