G.E.SOCITIES COLLEGE OF EDUCATION,SANGAMNER . PROJECT ON:- WASTE WATER MANAGEMENT

1. G.E.SOCITIES COLLEGE OF EDUCATION,SANGAMNER.PROJECT ON:-WASTE WATER MANAGEMENT STUDENT NAME:- 1) PANSARE DEVRAM.J 2) POTE MOHIT.K. ACADAMIC YEAR:-2010-11

2. POLLUTION • Pollutionis the introduction of contaminants into a natural environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms. • Pollution can take the form of chemical substances or energy, such as noise, heat, or light. Pollutants, the elements of pollution, can be foreign substances or energies.

3. POLLUTION • Air Pollution • Industrial wastewater

4. Origins of sewage:- • Industrial water

5. Origins of sewage:- • Household Waste

6. Sewage treatment

7. Sewage sludge treatment Sewage is created:- Residential, institutional, and commercial and industrial establishments and includes household waste liquid from toilets, baths, showers, kitchens, sinks and so forth that is disposed of via sewers. The separation and draining of household waste into greywater and blackwater

8. Sewage sludge treatment • Modern sewered developments tend to be provided with separate storm drain systems for rainwater. • As rainfall travels over roofs and the ground, it may pick up various contaminants including soil particles and other sediment, heavy metals, organic compounds, animal waste, and oil and grease.

9. Sewage sludge treatment • The sludges accumulated in a wastewater treatment process must be treated and disposed of in a safe and effective manner. • The purpose of digestion is to reduce the amount of organic matter and the number of disease-causing microorganisms present in the solids. • The most common treatment options include anaerobic digestion, aerobic digestion, and composting. Incineration is also used albeit to a much

10. Process :- • Sewage treatment generally involves three stages:- • Primary • Secondary • Tertiary treatment

11. Process flow diagram

12. Primary treatment • Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. The settled and floating materials are removed and the remaining liquid may be discharged or subjected to secondary treatment.

13. sedimentation tank

14. sedimentation tank • Pre-treatment may include a sand or grit channel or chamber • where the velocity of the incoming wastewater is adjusted to allow the settlement of sand, grit, stones, and broken glass. • These particles are removed because they may damage pumps and other equipment.

15. Secondary treatment Process Flow Diagram

16. Secondary treatment • 1. Secondary treatment removes dissolved and suspended biological matter. • 2. Secondary treatment is typically performed by indigenous, water-borne micro-organisms in a managed habitat. • 3. Secondary treatment may require a separation process to remove the micro-organisms from the treated water prior to discharge or tertiary treatment.

17. Secondary treatment • Secondary treatment is designed to substantially degrade the biological content. • The bacteria and protozoa consume biodegradable soluble organic contaminants .

18. Secondary sedimentation

19. Tertiary treatment • Final treatment stage to raise the effluent quality before it is discharged to the receiving environment • Filtration Sand filtration removes the residual suspended matter • Lagooning Settlement and further biological improvement through storage in large man-made ponds or lagoons. These lagoons are highly aerobic and colonization by native macrophytes.

20. Tertiary treatment • Nutrient removal Wastewater may contain high levels of the nutrients nitrogen and phosphorus. • Nitrogen removal The removal of nitrogen is effected through the biological oxidation of nitrogen from ammonia to nitrate (nitrification), followed by denitrification. Nitrogen gas is released to the atmosphere

21. Environment Thank You