Compounds and mixtures, Aliphatic and aromatic compounds, Mixtures, Fixatives, Organic derivatives and substituted compounds, Biochemicals, Inorganic compounds, Incinerators, Odor control equipment, Septic tanks, Settling tanks, Lift stations, Sewage distributors, Sludge disposal equipment, Sludge collectors, Sludge conditioning equipment, Sludge or sewage digesters