SEMINAR ON “WASTE WATER TREATMWNTS”

Presented by Mohammed Inzamamuddin

M.Sc. 2nd Semester Environmental ScienceSession 2015-2017

Department of Environmental ScienceUniversity Teaching Department

Sarguja VishwavidyalayaCOURSE TITLE: WASTE MANAGEMENT

COURSE CODE: ENV B03COURSE TYPE: ECC/CB

• What is wastewater• The Need for Wastewater Treatment• Pollutants in waste water• Wastewater Treatment• Basic Wastewater Treatment Processes• Primary Treatment• Secondary Treatment• Land Treatment

CONTENTS

What is wastewater• Wastewater is water that has been used and must be treated before it is

released into another body of water, so that it does not cause further pollution of water sources. Wastewater comes from a variety of sources. Everything that you flush down your toilet or rinse down the drain is wastewater. Rainwater and runoff, along with various pollutants, go down street gutters and eventually end up at a wastewater treatment facility. Wastewater can also come from agricultural and industrial sources. Some wastewaters are more difficult to treat than others; for example, industrial wastewater can be difficult to treat, whereas domestic wastewater is relatively easy to treat.

The Need for Wastewater Treatment

• Wastewater treatment is needed so that we can use our rivers and streams for fishing, swimming and drinking water. For the first half of the 20th century, pollution in the Nation’s urban waterways resulted in frequent occurrences of low dissolved oxygen, fish kills, algal blooms and bacterial contamination. Early efforts in water pollution control prevented human waste from reaching water supplies or reduced floating debris that obstructed shipping. Pollution problems and their control were primarily local, not national, concerns. Since then, population and industrial growth have increased demands on our natural resources, altering the situation dramatically. Progress in abating pollution has barely kept ahead of population growth, changes in industrial processes, technological developments, changes in land use, business innovations, and many other factors. Increases in both the quantity and variety of goods

Pollutants in waste water

• Oxygen-Demanding Substances

• Pathogens

• Nutrients

• Inorganic and Synthetic Organic Chemicals

• Thermal

Wastewater Treatment

• 01.Basic Wastewater Treatment Processes

• 02.Primary Treatment

• 03.Secondary Treatment

• 04.Land Treatment

Basic Wastewater Treatment Processes

• 01.Physical• 02.Biological• 03.Chemical

Bar Screen

Primary Treatment

• 01.Preliminary Treatment• 02.Primary Sedimentation

Secondary Treatment

• 01.Attached Growth Processes • 02.Suspended Growth Processes• 03.Lagoons

Fig : 01: primary and secondary waste water treatment

You Can Do To Prevent Water Waste• Save Water in the Bathroom

Check your toilets for leaks• Stop using the toilet as an ashtray or waste basket• Put plastic bottles in your toilet tank - Put an inch of sand or pebbles inside each of two plastic bottles,

fill them with water, and put them in your toilet tank, safely away from operating mechanisms. The bottles may displace and save 10 or more gallons of water a day.

• Take shorter showers• Install water-saving shower heads or flow restricters• Take baths - use only a partially-filled tub• Turn off water after you wet your toothbrush• Rinse your razor in the sink by filling the sink with a few inches of warm water• Check faucets and pipes for leaks• Save Water in the Kitchen and Laundry

Use your automatic dishwasher only for full loads• Use your automatic washing machine only for full loads• If you wash dishes by hand, don't leave the water running for rinsing• Don't let the faucet run while you clean vegetables• Keep a bottle of drinking water in the refrigerator - running tap water to cool it off for drinking is

wasteful• Check faucets and pipes for leaks

• Don't let the faucet run while you clean vegetables• Keep a bottle of drinking water in the refrigerator - running tap water to cool

it off for drinking is wasteful• Check faucets and pipes for leaks• Save Water Outside

Water your lawn only when it needs it• Deep soak your lawn - water long enough for the moisture to soak down to

the roots• Water during the cool parts of the day - early morning is generally better than

dusk since it helps prevent the growth of fungus• Don't water the gutter - position sprinklers so water doesn't land on paved

areas• Plant drought-resistant trees and plants that need less watering• Put a layer of mulch around trees and plants• Use a broom, not a hose, to clean driveways and sidewalks• Don't run the hose while you wash your car• Tell your children not to play with the hose and sprinklers• Check for leaks in pipes, hoses, faucets, and couplings

Reference• http://www.slideshare.net/abhiiii4558/28737268-wastewatertreatmentppt• https://en.wikipedia.org/wiki/Wastewater_treatment• https://engineering.purdue.edu/~frankenb/NU-prowd/disease.htm• http://www.conserve-energy-future.com/sources-and-causes-of-water-pollution.php• http://www.emwis.org/topics/WaterReuse/doc641442• http://www.engineers.org/tec/file/MIIC%20Water-Wastewater%20Reports.pdf• http://www.slideshare.net/wwwtwastewater/basic-facts-of-using-containerized-mbbr-wastewater-treatment-plant• http://ottawa.ca/en/city-hall/accountability-and-transparency/corporate-planning-and-performance-management/wast

ewater-1• http://www.sheffy6marketing.com/index.php?page=test-child-page• http://cgi.tu-harburg.de/~awwweb/wbt/emwater/lessons/lesson_c1/lm_pg_1466.html• http://www.rpi.edu/dept/chem-eng/Biotech-Environ/Environmental/WWTP_Principles.html• http://www.safewater.org/PDFS/resourcesknowthefacts/WastewaterTreatment.pdf• https://en.wikipedia.org/wiki/Sewage_treatment• http://www.greywater.com/• https://www.pinterest.com/yatesenvser/wastewater/• United States Environmental Protection Agency. February 2006. The Water Sourcebooks: Fact• United States Environmental Protection Agency. 2007. Septic Technologies: Background and• City of Saskatoon. 2007. Wastewater Treatment Process. • Adrian, D.D and Sanders, T.G. (1998) Oxygen sag equation for second order BOD decay. Water Research, 32, 840-48.• Aderisio, K.A. and DeLuca, N. (1999) Seasonal enumeration of fecal coliform bacteria from the feces of ring-billed gulls

(Larus delawarensis) and Canada geese {Branta canadiensis). Applied and Environmental Microbiology, 65, 5628-30. Adin

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