Course Glossary


This shows the specialized terms used in EarthWise Academy. This section contains all the definitions used in the various course glossaries used by each course.

Browse the glossary using this index

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A

Anaerobic Bacteria

Also known as anaerobes. Bacteria that live and reproduce in an environment containing no "free" oxygen or DO (this type of environment is referred to as anoxic conditions). Anaerobic bacteria obtain their oxygen supply by breaking down chemical compounds which contain oxygen, such as sulfate.
  • (BIO10) Estimating Sludge Volume (2343)
  • (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)

Anoxic

A condition in which dissolved (atmospheric) oxygen is deficient, however, oxygen is available in the combined form (e.g., nitrate, sulfate and carbonate).
  • (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)

Autotrophic Organisms

Also known as autotrophs. Organisms that use inorganic materials for energy and growth.
  • (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)

Autotrophs

Organisms that use inorganic materials for energy and growth.
  • (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)

B

Basicity

The concentration of OH- ions in a solution, measured as pH or, alternatively, pOH. A solution is basic if it has a pH higher than 7.0 or a pH lower than 7.0.
  • (DBP43) Jar Testing for Process Control of Conventional Filtration: Part 1 (2019)

Biochemical Oxygen Demand

Biochemical Oxygen Demand — BOD A measure of the oxygen required to break down organic materials in water using biological means. The amount of oxygen required to oxidize any organic matter present in water during a specified period of time, usually 5 days. It is an indirect measure of the amount of organic matter present in water that is used to monitor natural waters and processed effluents discharged into natural waters.
  • (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
  • (BNR02) Nitrification Factors — Suspended Growth Treatment Systems (1821)
  • (BIO10) Estimating Sludge Volume (2343)

Biological Treatment

Microrganisms growing and reproducing in a controlled environment are used to partially stabilize (oxidize) organic matter.

  • (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
  • (BNR02) Nitrification Factors — Suspended Growth Treatment Systems (1821)
  • (BIO10) Estimating Sludge Volume (2343)

Biosolids

Nutrient-rich organic material that are produced from the stabilization of sewage sludge and residential septage that meets specific quality criteria and are suitable for land application.

  • (BIO01) Biosolids Agronomic Loading Rates Part 1 (1247)
  • (BIO02) Biosolids Agronomic Loading Rates Part 2 – Manure (1484)

Biosolids (Exceptional Quality)

Biosolids that meet stricter pollutant and pathogen reduction criteria.

  • (BIO02) Biosolids Agronomic Loading Rates Part 2 – Manure (1484)

Biosolids (Non-Exceptional Quality)

Non-exceptional quality biosolids are biosolids that meet specified pollutant and pathogen reduction criteria. Criteria for non-exceptional quality biosolids are less stringent than criteria for exceptional quality biosolids.

Note: The term 'Biosolids' can be used to refer to all categories of biosolids collectively, or can be used to refer specifically to the category non-exceptional quality biosolids.

  • (BIO02) Biosolids Agronomic Loading Rates Part 2 – Manure (1484)

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