In this article we will discuss about the composition of sewage. Sewage is the used and wastewater consisting of human excreta, wash waters, and industrial and agricultural wastes (e.g. wastes from live stock i.e. chicken, cattle, horse, etc.) that enter the sewage system. In general sewage contains about 95.5% water and 0.1 to 0.5% organic and inorganic materials. The solid [...]
In some countries (particularly in third world) wastes (solid as well as liquid) are the major source of pollution due to generation in large quantities, and pose environmental problems. Wastes generated after biogas production in the form of slurry, used as compost for agricultural fields. The human and animal excreta are used for biogas production. The 'Integrated Health and Energy [...]
Basically, there are two levels of sewage treatment on the basis of amount of sewage generated by humans: small scale treatment and large scale treatment. Small scale treatment of sewage is done in small homes and rural areas, whereas large scale treatment is done in towns and cities by municipal bodies. 1. Small Scale Sewage Treatment: There are several methods [...]