SEWAGE AND SEA WATERPOLLUTION Presented By Tasin Parvez Sheikh Tushar Dahat
Sewerage• Discharge of untreated sewage is single most important cause for pollution of surface and ground water because there is a large gap between generation and treatment of domestic wastewater in India.
Where the Sewage Problem Came From“The flushing toilet was invented almost 200 years ago, yetwe as a society are still trying to manage the health andenvironmental impact of our own waste. The whole idea of‘public health’ was developed in response to the infectioncreated by allowing urban streets to flow with septicwastes. Eventually, the crises in pests, disease and plaguesled to the creation and infrastructure of sewage systems toremove these wastes and confine them away from thepublic in a sewage treatment plant.”
How Sewage Enters Waterways Sewage can enter waterways through:• Urban runoff• Sewage leaking from broken pipelines• Sewage leaking out of pipes directly into storm water drains• Overflows due to clogs within the sewage system• Illegal dumping of toilet wastes into storm water drains• Irrigation of ‘grey water’
Liters water per capita per day• The following norms are being adopted by the Government for the rural water supply schemes. Provision of 40 litres of water per day per capita is aimed at in the rural areas currently. Purpose Quantity Drinking 3 Cooking 5 Bathing 15 Washing utensils & house 7 Ablution 10• Government of India norms for piped water supply in towns and cities are as follows. Towns without sewerage – 70lpcd Cities with sewers/proposed – 135lpcd Mega cities with sewers/proposed – 150lpcd
WHO Say’s• According to the World Health Organization (WHO), on average a person needs 3 liters of water for drinking, 4 liters for cooking, 20 liters for bathing, 40 liters for sanitation, 25 liters to wash vessels and 23 liters for gardening.
Causes of Sea Water Pollution• 1 Oil Pollution• 2 Sewage• 3 Radioactive Waste
Sea water pollution: effects of human activities • The seas & oceans receive the brunt of human waste , whether it is by deliberate dumping or by natural run-off from the land • Bad impact & severely affecting marine food chain