T19+Slides - Bioremediation Bioremediation Biology...

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1 10 million tons per year 75 lbs/person/yr Biosolids Disposal Land App. Incineration Landfill Marketing 50% 27% 4% 19% Sewage sludge being dumped off New York City, 1989. (© Greenpeace) Biosolids Total N 7% NH 4 -N 3% Total P 2.5% pH 7.4 EC (salt) 5 dS/m Concerns with Biosolid Use Pathogens Heavy metals Nutrients Toxic organics Soluble salts Odor Decomposition Nutrient uptake Adsorption/Exchange Physical filtering Removal of pathogens Soil as a Living Filter
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2 Considerations for Land Disposal Soil texture Soil organic matter concentration CEC/AEC, adsorption potential Soil slope Soil depth Plant cover and nutrient needs Application rate Benefits of Biosolids Increased organic matter Improved physical properties Soil acidity modification Biosolid Slurry being Stored for Land Application Sludge Application in Forest Ecosystems No Sludge Applied Sludge Applied Sludge application greatly increases growth rate
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3 Septic Systems in Rural Areas “Soil as a Living Filter”
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Unformatted text preview: Bioremediation Bioremediation Biology “Remediate”= To solve a problem Bio-Remediate= to use biological organisms to solve an environmental problem Bioremediation The collective range of clean up methods using microorganism (e.g., bacteria, fungi, etc.) and plants to extract or degrade hazardous organic contaminants or convert hazardous contaminants to environmentally less toxic or nontoxic compounds in soils, subsurface materials, and water Microbial Decomposition of Oil “oil-eating bacteria” Microbial Decomposition of Gasoline Selenium Volatilization In-situ Groundwater Treatment Denitrification Beds Phytoremdiation - Plants • Decomposition/ Transformation • Plant uptake • Volatilization Plant Extraction of Metals Trees extraction metals & produce enzymes to breakdown organic compounds (e.g., TNT) Hyperaccumulating plants (mustard family) extract metals Wetland Treatment...
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This note was uploaded on 01/27/2011 for the course SSO 10 taught by Professor Randydahlgren during the Fall '10 term at UC Davis.

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T19+Slides - Bioremediation Bioremediation Biology...

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