Nitrogenous BOD (biochemical oxygen demand) - The stage of decomposition that occurs in biological treatment processes when specialized aerobic bacteria (nitrifiers), use DO to change ammonia to nitrate; sometimes referred to as second-stage BOD.

• (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
• (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)

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)

Particles that take a lengthy amount of time to settle by gravity (i.e. many hours, days, or years).

• (COA01) Coagulation – Part 1: The Chemistry of Coagulation (1248)

NPDES - National Pollutant Discharge Elimination System

• (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
• (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)

A central mass about which other matter collects; a starting point for growth or development.

• (COA01) Coagulation – Part 1: The Chemistry of Coagulation (1248)
• (COA02) Coagulation – Part 2: Coagulation Chemicals (1249)

1. Relating or belonging to the class of chemical compounds having a carbon basis.
   • (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
   • (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)
2. Substances that come from animal or plant sources and contain carbon. Examples include wood, sugars, proteins, plastics, petroleum-based compounds, solvents and pesticides.
   • (BIO01) Biosolids Agronomic Loading Rates Part 1 (1247)
   • (BIO02) Biosolids Agronomic Loading Rates Part 2 – Manure (1484)

Derived from animals and plants, or may be manufactured chemical compounds. However, all organics contain carbon. Organic contaminants can be biodegradable, which means that the contaminants can be consumed by bacteria and other microorganisms. In the process of being consumed, these organics will exert an oxygen demand (BOD) which can be measured as the Biochemical Oxygen Demand (BOD) of the wastewater. Some organic contaminants (refractory organics) are resistant to biodegradation.

• (BIO10) Estimating Sludge Volume (2343)

1. Relating or belonging to the class of chemical compounds having a carbon basis.
   • (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
2. Material which comes mainly from animal or plant sources. Organic wastes generally can be consumed by bacteria and other small organisms.
   • (BIO10) Estimating Sludge Volume (2343)

Waste material that comes mainly from animal or plant sources. Organic wastes generally can be consumed by bacteria and other small organisms. Inorganic wastes are chemical substances of mineral origin.

• (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
• (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)

The addition of oxygen, removal of hydrogen, or the removal of electrons from an element of compound. With respect to water treatment, organic matter is oxidized to more stable substances.

• (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
• (BIO10) Estimating Sludge Volume (2343)