Lecture 41 - Nonhazardous Organic Compounds Lecture #41...

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Nonhazardous Organic Compounds ± Lecture #41 ± nonhazardous organic compounds ± ThOD, BOD ± ICP #36, 37 ± Reading V: Ch. 8 (pg. 163-176) What you should know ± 1. What is a non-hazardous organic waste? What environmental problems are associated with non-hazardous organic wastes? ± 2. What is ThOD? BOD? BOD 5 ? ± 3. How do we measure BOD? ± 4. How does temperature impact BOD and its measure? How do we account for temperature impacts? Hazardous Organics; VOCs ± Previously discussed VOCs with emphasis on hazardous compounds: PCE, TCE, toluene ± VOCs sparingly soluble, readily volatilized, partitioning to organic matter ± Information on compounds and health effects: MSDS, OSHA ± Remediation exploits properties: removal from water/air (PAC, GAC) Nonhazardous Organic Matter ± natural organic matter from decaying plants and animals ± synthetic organic material from wastewater discharges ± domestic sources (food, sewage) ± industrial sources (wastewater) ± biodegradable (starches, fats, proteins, alcohols, acids, aldehydes, and esters) ± nonbiodegradable (e.g., natural: humic and lignin substances; synthetic: plastics) Nonhazardous Organic Matter ± materials can cause color, taste and odor problems ± nonvolatile, nonflammable, relatively nontoxic, often more soluble in water than VOCs ± main concern is the result of oxygen depletion by microorganisms Oxygen Depletion ± can cause fish kills by microorganisms (if O 2 < 5 mg/L) Florida red tide bloom dinoflagellate Alexandrium tamarense
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Lecture 41 - Nonhazardous Organic Compounds Lecture #41...

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