- wastewater containing sewage
Biochemical Oxygen Demand (BOD)
- The amount of oxygen needed by the organisms to break down organic material.
- A type of sewage treatment plant that uses a series of rotating discs for the organisams to live on.
- Biological material from living, or recently living organisms.
Biological Aerated Filter (BAF)
- A type of sewage treatment plant that contains a submerged medium with a large surface area which is aerated.
Biological Filter (BF)
- A circular tank that uses a pump to spread waste through the system
- Represents the interests of the UK water and wastewater industry on UK and European regulations and legislation.
- A watertight holding tank for sewage and effluent that is used where ground conditions prevent the use of a septic tank or sewage treatment plant.
- Material which forms on top of the effluent and sludge in a tank that is removed when the system is desludged.
Consent to Discharge
- Permission from the Environment Agency to discharge final, trade or industrial effluent, surface water or storm water to a receiving watercourse.
Duty of Care
- Your legal responsibility to make sure any waste that you produce, store, transport or dispose of is done without harming the environment.
- Removing the crust, sludge and waste material using a specialist tanker.
- Waste water mixed with waste.
Environment Agency (EA)
- Regulatory body for England and Wales.
Final Settlement Tank (Tertairy Tank)
- A secondary settlement tank where the treated waste flows and settles.
Fat Oil and Grease (FOG)
- By products of cooking from kitchens and food processing sites, the waste gets washed down the sink and can block pipes and drains when it cools.
- A device to separate grease, fat and oil from wastewater.
- Groundwater lies below the ground in the saturation zone (below the water table).
- A settlement tank following the primary and secondary treatment tanks.
- A way of connecting a property to the mains sewer, using either gravity or a pump.
- An underground system, which collects sewage and waste water and transports it to a sewage works for treatment.
- Material within a sewage treatment plant that the microbes live on.
Package Treatment Plant
- Another name for a sewage treatment plant
Per Capita Volume and Loads
- The volume in litres that a single domestic person uses per day with the organic and ammonia load expressed in grams.
Population Equivalent (PE)
- The maximum number of people a premises can accommodate based on 60 gallons BOD per head per day. Used when sizing a sewage treatment plant.
- The test shows if the land around a septic tank or sewage treatment plant is absorbant enough for effluent to soak away.
Preactivated Dosing System (Grease Management)
- Releases bacteria into drain runs to prevent the build up of FOGs in pipes.
Primary Settlement Tank
- Where solid matter is allowed to settle by sedimentation.
Pumped to Mains
- Connecting a properties sewerage system, straight to the mains sewer, using either gravity or a pump
- Reeds planted over a gravel bed which offer a form of additional treatment for sewage.
Rotating Biological Contractor (RBC)
- Used in sewage treatment plants, a series of slowly rotating parallel discs on a horizontal shaft. The discs rotate in and out of the settled effluent and the treatment takes place on the discs.
Sequencing Batch Reactor (SBR)
- A treatment process that distributes oxygen through the waste to reduce the BOD.
Secondary Settlement Tank
- Where treatment happens using naturally occurring micro-organisms.
- A simple treatment tank with an outlet pipe which allows effluent to soak away.
Sewage Treatment Plant
- A multistage tank using biological processes and pumps to treat sewage and effluent to a high standard for discharge to a watercourse.
SEPA (Scottish Environment Protection Agency)
- Regulatory body for Scotland
- Sludge is the matter that is produced by all sewage systems and must be removed regularly.
Submerged Aerated Filter (SAF)
- A submerged mechanical device distributes oxygen through the waste.
Sustainable Drainage Systems (SuDS)
- Reducing the amount of sufrace runoff into drains by either diverting the volume or velocity of water entering in the first place, or divert the water for other purposes.
- Rain water which falls onto roofs, drives, car parks, roads etc.
- Allows treated effluent from a septic tank or sewage treatment plant to seep slowly into the ground usually in the form of perforated pipes laid out in a herringbone design.
- Is everything that gets put down drains from toilets, sinks, washing machines, dishwashers and showers etc
- Run off water from roofs, car parks, highways etc
- Describes the system or network, e.g. sewage runs in a sewerage system
- Is a moving body of water such as a stream or river.
- The underground depth at which point the ground is totally saturated with water
Waste Carrier / License
- Any business operating a waste carrying business is required by law to have a waste carrier's licence from the Environment Agency.
Waste Transfer Note
- A waste transfer note is a legal document that details the transfer of waste from one person to another. They must be kept for a minimum of two years after a job date
Has anything been missed off? Let us know.