Presentation on theme: "Remember - “you and I can decide the future”"— Presentation transcript:
1Remember - “you and I can decide the future” E-Weekly-4/2Green Earth MovementAn E-Newsletter for the cause of Environment, Peace, Harmony and JusticeRemember - “you and I can decide the future”G E M
2The term "wastewater treatment" is also called "sewage treatment The term "wastewater treatment" is also called "sewage treatment." Nature has an amazing ability to cope with small amounts of water wastes and pollution, but it would be overwhelmed if we didn't treat the billions of gallons of wastewater and sewage produced every day before releasing it back to the environment. Treatment plants reduce pollutants in wastewater to a level nature can handle.
3Wastewater is used water Wastewater is used water. It includes substances such as human waste, food scraps, oils, soaps and chemicals. In homes, this includes water from sinks, showers, bathtubs, toilets, washing machines and dishwashers. Businesses and industries also contribute theirshare of used water that mustbe cleaned.Wastewater also includes stormrunoff. Although some peopleassume that the rain that runsdown the street during a stormis fairly clean, it isn't. Harmful substances that wash off roads, parking lots, and rooftops can harm our rivers and lakes.
4Why Treat Wastewater?It's a matter of caring for our environment and for our own health. There are a lot of good reasons why keeping our water clean is an important priority:
51. FisheriesClean water is critical to plants and animals that live in water. This is important to the fishing industry, sport fishing enthusiasts, and future generations.
6birds use the areas for resting and feeding. Wildlife habitatsOur rivers and ocean waters teem with life that depends on shoreline, beaches and marshes. They arecritical habitats forhundreds of speciesof fish and otheraquatic life.Migratory waterbirds use the areas for resting and feeding.
7Recreation and quality of life Water is a great playground for us all. The scenic and recreationalvalues of our watersare reasons manypeople choose to livewhere they do. Visitorsare drawn to wateractivities such as swimming, fishing, boating and picnicking.
8Health concernsIf it is not properly cleaned, water can carry disease. Since we live, work and play so close to water, harmful bacteria have to be removed to make water safe.
9Effects of wastewater pollutants If wastewater is not properly treated, then the environmentand human health can benegatively impacted. Theseimpacts can include harm to fishand wildlife populations, oxygendepletion, beach closures andother restrictions on recreational water use, restrictions on fish and shellfish harvesting and contamination of drinking water. Environment Canada provides some examples of pollutants that can be found in wastewater and the potentially harmful effects these substances can have on ecosystems and human health:
10Decaying organic matter and debris can use up the dissolved oxygen in a lake so fish and other aquatic biota cannot survive;Excessive nutrients, such as phosphorus and nitrogen (including ammonia), can cause eutrophication, or over-fertilization of receiving waters, which can be toxic to aquatic organisms, promote excessive plant growth, reduce available oxygen, harm spawning grounds, alter habitat and lead to a decline in certain species;
11Chlorine compounds and inorganic chloramines can be toxic to aquatic invertebrates, algae and fish;Bacteria, viruses anddisease-causing pathogenscan pollute beaches andcontaminate shellfishpopulations,leading to restrictions on human recreation, drinking water consumption and shellfish consumption;
12Metals, such as mercury, lead, cadmium, chromium and arsenic can have acute and chronic toxic effects on species.Other substances such as some pharmaceutical and personal care products, primarily entering the environment in wastewater effluents, may also pose threats to human health, aquatic life and wildlife.
13PROCES OF WASTE WATER TREATMENT Sewage treatment generally involves three stages, called primary, secondary and tertiary treatment.1] Primary treatment consists oftemporarily holding the sewagein a quiescent basin where heavysolids can settle to the bottomwhile oil, grease and lighter solidsfloat to the surface. The settledand floating materials are removed and the remaining liquid may be discharged or subjected to secondary treatment.
142] Secondary treatment removes dissolved and suspended biological matter. Secondary treatment is typically performed by indiginous, water-borne micro-organisms in a managed habitat. Secondary treatment may require a separation process to remove the micro-organisms from the treated water prior to discharge or tertiary treatment.
15Disinfection is considered part of secondary treatment of wastewater Disinfection is considered part of secondary treatment of wastewater. This can be accomplished through chemical, ultraviolet light or ozone processes. The most common way to disinfect water at this stage is to use chlorine. Disinfection inactivates biologicalcontaminants in thewastewater prior todischarge of the waterback into the environment.
16The sludge that is removed from primary and secondary treatment processes must also be treated prior to being disposed. As for the water, look carefully at what is discharged from the plant andconsider all of the ways it has beentreated – physically, biologicallyand chemically – and you will beamazed at the clean, clear waterthat is produced. For the past 40years, the Clean Water Acthas regulated these processes to protect the environment and the public’s health. The act, along with other federal and state regulations, ensures that we can use this water again. After all, the wastewater that is treated will be used again by the planet and eventually our bodies.
173] Tertiary treatment is sometimes defined as anything more thanprimary and secondarytreatment in order to allowrejection into a highlysensitive or fragile ecosystem(estuaries, low-flow rivers,coral reefs,...). Treatedwater is sometimes disinfectedchemically or physically (for example, by lagoons and microfiltration) prior to discharge into a stream, river, bay, lagoon or wetland, or it can be used for the irrigation of a golf course, green way or park. If it is sufficiently clean, it can also be used for groundwater recharge or agricultural purposes.
18BENEFITS OF WASTE WATER TREATMENT 1] Clean WaterWater is a renewableresource because it getspurified throughevaporation and rain;however, only about 3 percent of the earth's water is potable. Although nature slowly cleans wastewater over time, the main benefit of wastewater treatment is maintaining clean water for reuse.
192] New Research and Improvements Wastewater treatment processes are changing as researchers develop new techniques. Such research leads to improvements in purification, the speed of water treatment and uses for the waste products removed. Development of new processes also saves more energy, time and resources, which are then available for other needs.
203] DiseaseWastewater treatmentprocesses can contain andremove potentialdisease-causing contaminantsthrough a filtering system that blocks their path and further treatment that kills harmful organisms. This keeps potential diseases and bacteria from entering other water sources, or the ground, and harming people as well as plants and animals. Treatment systems continue to develop better methods of purifying the water.
214] EconomicsJobs are created by wastewater treatment research and processing. Treatment facilities, for example, require regular maintenance and human operation. In addition, returning clean water to rivers and streamshelps maintain natural areas,encouraging tourism.
22LIST OF SOME OF THE WASTE WATER CONSULTANTS (Courtesy: Internet. List not exhaustive)Ahmedabad: FREEION ENGINEERING, 06 Nutan Prakash Park, Chandkheda Sabermati, Ioc Road, D Cabin, Ahmedabad – , , ,Bangalore: LIFE GUARD SALES AND SERVICES: No.6, 1st Flr, Opp Bajaj Showroom, Old Madras Rd, Subhash Ngr, Virgonagar, Post, Krishnarajapuram, Bangalore – , (080)Delhi: Fontus Water Limited, A-1/152, In Front Of Shiv Mandir, Ignou Rd, Okhla Industrial Area, Delhi – , Tel: (011)Goa: ESTEEM HYDRO SYSTEM PVT LTD, 21-A, Jalvayu Villa, Near MES College, Jaikisan Club Road, Zuarinagar, GOA – , , , (0832)Gurgaon: DR GHOSH LABORATORIES, 113/16 Prem Nagar, Near Sohna Chowk, Old Jail Road, Gurgaon, Gurgaon | (011)Mumbai: 1] FILTRA CONSULTANTS AND ENGINEERS, 109, Shiv Sagar Industrial Estate, Opp Aarey Road, Kotkar Road, Goregaon East, Mumbai – , (022) , , ,2] THERMAX LIMITED, Dhanraj Mahal,2nd Floor, Near Gateway Of India, Chatrapati Shivaji Marg, Colaba, Mumbai – , , (022) ,Secunderabad: PURE & PRISTINE SOLUTIONS: Plot No. 52/1, H.No 8/7/178/28 Swarnadhama Nagar, Old Bowenpally, Secundrabad , India, +(91)
23This educational PowerPoint Presentation is prepared by GEM Team (courtesy: internet). For other similar GEM PowerPoint Presentations on various environmental issues see next..
24Zero GarbageSolar Energy -(Darkness to Light)Junk FoodTwenty Tips To Save NaturePlastic – a boon or bane?Green PassionSoft drink – A Health HazardWaste to energyRain Water HarvestingEco-friendly ReligionsHappy Green DiwaliClimate ChangeThe future of BiodiversityGenetically Modified FoodsWaste Water TreatmentThese PPTs may be downloaded from our website: – GEM section