Science Chapter 13: Wastewater Story

Used water is wastewater. Wastewater could be reused. Wastewater is generated in homes, industries, agricultural fields and in other human activities. This is called sewage.

Sewage is a liquid waste which causes water and soil pollution. Wastewater is treated in a sewage treatment plant. Treatment plants reduce pollutants in wastewater to a level where nature can take care of it.

Where underground sewerage systems and refuse disposal systems are not available, the low cost on-site sanitation system can be adopted. By-products of wastewater treatment are sludge and biogas.

Open drain system is a breeding place for flies, mosquitoes and organisms which cause diseases. We should not defecate in the open. It is possible to have safe disposal of excreta by low cost methods.