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ODOUR

ODOUR. From mushrooms at Salem to merphos in Parnell. PANIC OR HYSTERIA. W.R.McLeod Aust & NZ J.Psych. 9:225 (1975) R. Bartholomew et al Southern Med. J. 92:762 (1999).

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ODOUR

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  1. ODOUR

  2. From mushrooms at Salem to merphos in Parnell PANIC OR HYSTERIA W.R.McLeod Aust & NZ J.Psych. 9:225 (1975) R. Bartholomew et al Southern Med. J. 92:762 (1999)

  3. PARNELL CIVIL EMERGENCY23/2/73 Good Navigator’s leaking defoliant cargo precipitates widespread concern, even panic • Murphos: • O,O-Diethyl-O-(4-nitrophenyl) phosphorothioate • Merphos: • tributyl phosphorotrithioite Commission of Inquiry: merphos low toxicity blamed butyl mercaptan Merphos Murphos

  4. ODOUR COMPLAINTS • Chocolate, coffee, beer • Crotonaldehyde (2-butenal) • Sulfides-mercaptans arise from brick-making and give a smell rather like burning rubber • Thiomethane smells like rotten cabbage released from animal faeces • Trimethylamine • Cadaverine (1,5-diaminopentane) decarboxylation product of the amino acid lysine – typical diamine • Skatacole

  5. SKATOLEBOAR TAINT • 3-methylindole • Strongest odour on a per molecule basis • In faeces as a breakdown product from haemoglobin • Taints meat

  6. ODOUR DIARY http://www.mfe.govt.nz/publications/air/odour-guidelines-jun03/html/page11.html

  7. MEASURING ODOUR • Dilution olfactometry and exposure to panels of people - n-butanol standard • E-nose polymer films that conduct electricity when materials are deposited • Fingerprints

  8. Management remains complex… many chemicals in many phases and subtle reactions between them…

  9. Journal of the Air and Waste Management Association • Volume 57, Issue 6, June 2007, Pages 761-768 • Effectiveness of porous covers for control of ammonia, reduced sulfur compounds, total hydrocarbons, selected volatile organic compounds, and odor from hog manure storage lagoons • Regmi, S.et al • Anaerobic lagoons are a major source of odor at concentrated animal feeding operations. Seven different kinds of artificial (geotextile and polyethylene foam) and natural (straw and redwood) permeable lagoon covers were evaluated for their potential to reduce odorous emissions generated by anaerobic waste lagoons. A novel floating sampling raft was constructed and used to simultaneously evaluate the effectiveness of lagoon covers on an operating swine waste lagoon. The air collected from the raft was evaluated for odor, total reduced sulfur (TRS) compounds, ammonia, total hydrocarbons, dimethyldisulfide, and trimethylamine. The emission rates from the lagoon were highly variable both temporally and spatially. All of the lagoon covers substantially reduced TRS emissions and odor. Geotextile fabric and a recycled foam cover exhibited the greatest reduction in total hydrocarbon emissions; natural covers were less effective. Because of consistently low emission rates of ammonia, no statistically significant reduction of ammonia emissions were observed from any of the lagoon covers

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