Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. of
Sub-Agency 0011 - Water Quality
Chapter 15 - USE OF SURFACE DISPOSAL OF BIOSOLIDS, APP. A-C
Part C - SURFACE DISPOSAL
Section 30 - Special definitions
Current through September 21, 2024
(a) "Aerobic digestion" is the biochemical decomposition of organic matter in biosolids into carbon dioxide and water by microorganisms in the presence of air.
(b) "Anaerobic digestion" is the biochemical decomposition of organic matter in biosolids into methane gas and carbon dioxide by microorganisms in the absence of air.
(c) "Density of microorganisms" is the number of microorganisms per unit mass of total solids (dry weight) in the biosolids.
(d) "Land with a high potential for public exposure" is land that the public uses frequently. This includes, but is not limited to, a public contact site and a reclamation site located in a populated area (e.g, a construction site located in a city).
(e) "Land with a low potential for public exposure" is land that the public uses infrequently. This includes, but is not limited to, agricultural land, forest, and a reclamation site located in an unpopulated area (e.g., a strip mine located in a rural area).
(f) "Pathogenic organisms" are disease-causing organisms. These include, but are not limited to, certain bacteria, protozoa, viruses, and viable helminth ova.
(g) "pH" means the logarithm of the reciprocal of the hydrogen ion concentration.
(h) "Specific oxygen uptake rate (SOUR)" is the mass of oxygen consumed per unit time per unit mass of total solids (dry weight basis) in the biosolids.
(i) "Total solids" are the materials in biosolids that remain as residue when the biosolids is dried at 103 to 105 degrees Celsius.
(j) "Unstabilized solids" are organic materials in biosolids that have not been treated in either an aerobic or anaerobic treatment process.
(k) "Vector attraction" is the characteristic of biosolids that attracts rodents, flies, mosqui-tos, or other organisms capable of transporting infectious agents.
(l) "Volatile solids" is the amount of the total solids in biosolids lost when the biosolids are combusted at 550 degrees Celsius in the presence of excess air.
