What does SSO mean in wastewater?
What is SSO in water?
What are the environmental effects of an SSO on the surface?
What is CSO water?
What is an SSO event?
What is combined system of sewerage?
Systems that carry a mixture of both domestic sewage and storm sewage are called combined sewers. Combined sewers typically consist of large-diameter pipes or tunnels, because of the large volumes of storm water that must be carried during wet-weather periods.
What is the impact of SSO on human health?
What are the steps in sewage treatment?
- Step 1: Screening and Pumping. ...
- Step 2: Grit Removal. ...
- Step 3: Primary Settling. ...
- Step 4: Aeration / Activated Sludge. ...
- Step 5: Secondary Settling. ...
- Step 6: Filtration. ...
- Step 7: Disinfection. ...
- Step 8: Oxygen Uptake.
What is SSO What is the impact of SSO on human health class 7?
What is a CSO drain?
What is a CSO environmental?
What is CSO discharge?
How can SSOs be reduced?
SSOs can be reduced by: Sewer system cleaning and maintenance. Reducing infiltration and inflow through system rehabilitation and repairing broken or leaking service lines. Enlarging or upgrading sewer, pump station, or sewage treatment plant capacity and/or reliability.
What are the causes of SSOs?
Problems that can cause SSOs include: Inappropriate materials sent to the sewers – materials such as fats, oils and grease (FOG), and some household products (including some marked ‘flushable’) such as baby wipes, facial wipes, sanitary pads, and tampons. All of these may create blockages,
How much is the sewer system worth?
EPA estimates that our nation's sewers are worth a total of more than $1 trillion. The collection system of a single large municipality is an asset worth billions of dollars and that of a smaller city could cost many millions to replace.
What causes a sanitary sewer to overflow?
A sanitary sewer overflow may be the result of a pipeline blockage, hydraulic overloading of pipelines or pump stations, equipment malfunctions, or damage to conveyance systems .
What is wastewater discharge?
Wastewater that flows out of a sanitary sewer (or lift station) as a result of flows exceeding the hydraulic capacity of the sewer or stoppages in the sewer, or a discharge of wastewater from a location that is not authorized by an NPDES permit.
What is sanitary sewer?
Sanitary sewer systems collect and transport domestic, commercial, and industrial wastewater and limited amounts of stormwater and infiltrated ground water to treatment facilities for appropriate treatment. Sanitary sewers are different than combined sewers, which are designed to collect large volumes of stormwater in addition to sewage and industrial wastewater. Occasionally, sanitary sewers will release raw sewage. These types of releases are called sanitary sewer overflows (SSOs). SSOs can contaminate our waters, causing serious water quality problems, and back-up into homes, causing property damage and threatening public health.
What is a sanitary sewer overflow?
Sanitary sewers are different than combined sewers, which are designed to collect large volumes of stormwater in addition to sewage and industrial wastewater. Occasionally, sanitary sewers will release raw sewage. These types of releases are called sanitary sewer overflows (SSOs).
What are the causes of SSOs?
Possible causes of SSOs include: sewer defects that allow stormwater and groundwater to overload the system, vandalism.
What causes SSOs?
Lift Station equipment failure is another common cause of SSOs for larger systems. If the utility does not have an effective maintenance program or the most practical pump for the waste that is being discharged, then the chances of an SSO increases.
Who is responsible for removing a blockage?
If the blockage occurs away from the customer’s property, then the responsibility is with the utility. Based on that, either the utility (or their insurer) or the customer should immediately provide services to remove the blockage and begin cleanup if the backup is into the customer’s home/building.
What is wastewater treatment?
It’s used primarily to treat BOD, COD, and suspended solids to very low levels where effluent may be able to be reused or recycled.
What are visible solids in wastewater?
Visible solids present in wastewater that can be filtered out through traditional physical treatment technologies. In the metal finishing industry, for example, FOG (fats, oils and grease) and dirt particles might make up part of the total suspended solids.
What is an indirect reading of the organic content present in wastewater?
Specifically, it refers to the amount of oxygen consumed to biologically degrade the organic material. It’s very expensive to treat, typically requiring a biological treatment technology like activated sludge.
Why is UV light used in wastewater treatment?
In some industries, ultraviolet light is used to sterilize water treated wastewater prior to reuse or recycling. UV light keeps algae and other bacteria from growing in the recycled wastewater.
What is biological water treatment?
A biological water treatment technology commonly used in municipal wastewater treatment systems. Sometimes private industry will harness this technique to reduce certain pollutants, such as BOD and COD (see definitions below), but usually only due to compliance concerns.
What is RO in filtration?
RO: Reverse Osmosis. A physical treatment technology based around the use of a membrane for filtration. It provides the greatest degree of filtration available and is very effective for filtering out small or even dissolved pollutants. It is subsequently the most expensive type of filtration.
What is total dissolved solid?
Total dissolved solids are inorganic molecules of metals, minerals or salts present in water at such a small size that you can’t see them . Because of their very small size, they can be difficult to remove with any technology other than fine membrane filtration technologies such as Reverse Osmosis (RO).