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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Entries starting with: A
ACC - Alternative Compliance Criteria Alternative criteria that can be used to achieve either monthly or annual compliance with the enhanced coagulation requirements of the DBP Rule.
A condition in which a substance yields H+ ions when it dissociates in water, resulting in a lowering of pH.
The concentration of H+ ions in a solution, measured as pH.
A coagulant aid that is created on-site by neutralizing sodium silicate.
Activated Sludge Process
A biological treatment process in which a mixture of wastewater and activated sludge is agitated and aerated. The activated sludge is subsequently separated from the treated wastewater by settlement and recycled or wasted. Although the configuration of activated sludge plants vary, the activated sludge process includes one or more aerated reactors that keep the solids in suspension; a liquid-solids separation device known as a clarifier; and a method of recycling the separated sludge from the clarifier back to the aerated reactor(s).
Acute health effects
Adverse effect on human health as a result of short-term exposure. Acute health effects occur within hours or days of the time that a person consumes a contaminant.
Additional Routine Monitoring
The accumulation of one material on the surface of another material through physical bonds
The gathering of a gas, liquid, or dissolved substance at the surface at the surface of solid bodies with which they are in contact.
Consists of additional biological or chemical treatment processes (beyond secondary treatment) that are employed to remove constituents such as nitrogen and phosphorus, that are not reduced significantly as a result of secondary treatment. Any process of water renovation that upgrades treated wastewater to meet specific reuse requirements. May include general cleanup of water or removal of specific parts or wastes insufficiently removed by conventional treatment processes. Typical processes include chemical treatment and pressure filtration.
A condition in which high levels of dissolved oxygen are made available.
Also called aerobes Bacteria that must have molecular (dissolved) oxygen to survive. Bacteria that will live and reproduce only in an environment containing oxygen, which is available for their respiration (breathing), namely atmospheric oxygen or oxygen dissolved in water. Oxygen combined chemically, such as in water molecules (H2O), cannot be used for respiration by aerobic bacteria.
Agronomic Loading Rates
The annual whole biosolids application rate designed to:
(DBP40) Enhanced Coagulation – Basics (1280)
Alternative Compliance Criteria
Alternative Compliance Criteria (ACC)— Alternative criteria that can be used to achieve either monthly or annual compliance with the enhanced coagulation requirements of the DBP Rule.
A condition in which dissolved molecular oxygen is not present, however, some chemically bound oxygen may be present.
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.
A condition in which dissolved (atmospheric) oxygen is deficient, however, oxygen is available in the combined form (e.g., nitrate, sulfate and carbonate).
Also known as autotrophs. Organisms that use inorganic materials for energy and growth.
Organisms that use inorganic materials for energy and growth.