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Untreated WatseWater

By: Samantha Atkinson
by

Sandra Filling

on 23 April 2010

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Transcript of Untreated WatseWater

UNTREATED WASTEWATER By: Samantha Atkinson So what is waste water? A combination of liquid and water wastes from residences,
commercial buildings, industrial plants and institutions,
together with any groundwater, surface water
and storm water that may be present.
There are 2 types of wastewater sources


First Source: is sanitary sewage is produced from
homes, businesses, institutions and industries. Second source: storm water, generated from rain or melting snow that drains off rooftops, lawns, parking lots, roads and other surfaces.

It is collected by sewer systems and is treated before being released into the environment and public.
Econonimcal Environmental
The process of collection and treatment of wastewater
also results in the release of certain chemicals into the atmosphere.
The chemicals typically released in the largest volumes are;
methane, carbon dioxide, oxides of nitrogen, hydrogen sulfide,
chlorine (when it is used in the treatment process)
and various other chemicals in smaller portions.

Air
The process of removing both inorganic and organic
suspended solids from the wastewater which results in large
quantities of solid waste.

In a typical treatment facilities, the inorganic solids,
debris and other non-biodegradable materials are sent
to a landfill.

Many secondary treatment facilities
Collect the organic solids and process them to recover
methane gas for energy .
These solid wastes can be used as a soil fertilizer
Land Wastewater effluents are released to a wide variety of receiving environments: lakes, ponds, streams, rivers, estuaries and oceans.

Waste matters released from wastewater systems contain pollutants of concern since even treatment systems are unable to remove all pollutants and chemicals completely.

The impacts that wastewater effluents can have on water quality, plant and animal life and human health and beneficial water uses, such as shellfish harvesting and recreation.

Some examples of pollutants that can be found in wastewater and the potentially harmful effects are:

•decaying organic matter and debris can use up the dissolved oxygen in a lake so fish and other aquatic biota cannot survive;
•chlorine compounds and inorganic can be toxic to aquatic life, algae and fish
•Metals, such as mercury, lead, cadmium, chromium and arsenic can have acute and chronic toxic effects on species.

Water Social and Health Effects Pure water does not exist in nature.
All water contains naturally acidic. This is because water droplets dissolve atmospheric gases, such as carbon dioxide, to form carbonic acid H CO Sources That CompromiseWater Quality 1. Point Source:

A manufacturing or processing plant that discharges untreated or insufficiently treated waste water into a river or lake is a point source of pollution.
Point sources can spread pollution over huge areas.
2. Diffuse Sources:

Pollution that comes from a wide range of sources, not from a single source. This run-off often carriers undesirable pollutants, including fecal matter, pesticides, fertilizer compounds, such as nitrates and phosphates. 3. Indirect Sources:

Air, water, and soil can become polluted from a variety of indirect sources. The concentrations of ions in ground water are affected by how acidic the water is. 2 3. Treating Water for Your Home Wastewater Treatment: The cleaning of used water by physical, chemical, and biological processes, removing all the contaminants to make water suitable for consumption. It is divided into 3 types:
Primary, secondary and teritary.
Primary:
involves removing solids from waste water physically, using filters and settling tanks. Secondary:
involves using bacteria to chemically decompose dissolved and suspended organic compounds Tertiary:
involves chemical treatments to remove the majority or remaining ions and disease-causing micro-organisms. "Combined heat and power (CHP) is a reliable, cost-effective option for municipal wastewater treatment facilities (WWTF)
— that have, or are planning to install, anaerobic digesters.
Biogas flow from these digesters can be used in a CHP system as "free" fuel to generate reliable electricity and power for the WWTF.

WWTFs are critical for maintaining public sanitation and a healthy environment,
and must be able to operate in the event of a natural or man-made disaster,
as well as any utility power outage.

A well-designed CHP system that is powered by digester
gas offers many benefits for WWTFs because it:

Produces power at a cost below retail electricity.
Displaces fuels normally purchased for the facility's thermal needs.
Qualifies as a renewable fuel for green power programs.
Offers an opportunity to reduce greenhouse gas and other air pollution emissions.
Enhances power reliability for the treatment plant.

More than 500 large WWTFs (with influent flow rates greater than 5 million gallons per day -thereby producing biogas.
If all of these facilities used their biogas to fuel CHP,
they would generate an additional 340 megawatts of clean electric capacity each year.
This increase in CHP use would eliminate approximately
2.3 million metric tons of carbon dioxide annually—
equivalent to removing the emissions of almost 430,000 cars or planting nearly 640,000 acres of forest.

In general, a WWTF with a total influent flow rate of 4.5 MGD can produce approximately:

100 kilowatts (kW) of electricity to offset purchased electricity or sell to the grid.
12.5 million British thermal units (Btus) per day of thermal energy that can be used as heat for an anaerobic digester and/or for space heating loads."

http://www.epa.gov/chp/markets/wastewater.html Watser water affects health in a varitey of ways. One of the most predominate parasites that seem to come up most often and seem to have a great effect on humans are:

Giardia and Cryptosporidium. Giardia and Cryptosporidium are microscopic parasites that can be found in water. Giardia causes an intestinal illness called giardiasis or "beaver fever." Cryptosporidium is responsible for a similar illness called cryptosporidiosis.

What is Giardia and Cryptosporidium? The End!
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