Not everyone is a wastewater expert, but that’s what we’re here for! Our glossary is designed to help you learn all things wastewater. Scroll through the glossary to get a high-level definition of each term, or click through the provided links for deeper learning on the topic. Dive on in!
The ratio of biological oxygen demand (BOD) to chemical oxygen demand (COD) which indicates the level of biodegradability of a sample, determines the presence of organic and inorganic matter present in wastewater. In domestic waste, the standard ratio between BOD/COD is 1:2, for untreated wastewater the BOD/COD ratio is between 0.3 to 0.8.
A treatment process that clarifies wastewater by removal of suspended solids, oils, greases, BOD, COD and metals – oily suspended solids float to surface and are skimmed away.One of the most robust and effective ways to remove TSS, BOD, FOG, phosphorus (P), or nutrients from industrial wastewaters.
Utilities consider high-strength to be anything over 300 mg/L BOD, technology providers consider high-strength to be anything over 1,000 mg/L BOD. Ultra- or super-high strength is over 10,000 mg/L BOD.
The mean residence time of wastewater in the biological reactor, i.e. the contact time between the pollutant and the microorganisms. BETT system provides between 4- and 20-h HRT under continuous flow conditions.
The residue of fermented wort left in a still after the distillation of whiskey or alcohol and used for animal feed. The pot ale is rich in organic matter and contains a variety of compounds, including carbohydrates, proteins, vitamins, and minerals and contains a high concentration of solids.
A byproduct of the fermentation process in the production of alcohol, such as wine or liquor. Vinasses contain a high concentration of organic matter, including sugars, proteins, and minerals and can be used for animal feed, soil fertilizer, and biogas production.