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11 Cards in this Set
- Front
- Back
What is the official title of the regulations? |
40 Code of Federal Regulations, Part 503 |
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What does the regulation protect? |
Public Health and the environment from the constituents that may be found in biosolids |
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What is the difference between Class A and Class B biosolids? |
The level of pathogens in the biosolids when they are recycled or disposed |
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Define pathogenic organisms |
Certain bacteria Protozoa Viruses Viable helminth ova (leads to parasitic worms) |
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Define vector attraction |
A characteristic of biosolids that attracts rodents, flies, mosquitoes, and other organisms capable of transmitting disease. |
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How many alternatives are available to meet the requirement of vector attraction reduction? |
12 |
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What is the most common alternative to meet the requirement for vector attraction reduction? |
Meet 38 percent reduction in volatile solids content (either aerobically or anaerobically) |
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How many alternatives are there to achieving Class A biosolids? What must they ALL accomplish? |
Six. Less than 1,000 MPN FC/g OR... Less than 3 MPN Salmonella/4g |
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What are some common alternatives used to treat Class A Biosolids? |
Thermally is one of four time-temp regimes (expl 50 C for 13.2 days) High-Temp High-pH |
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What are the parameters for High-Temp High-pH treatment of Class A Biosolids |
pH above 12 for 72 hours Temp above 52 C for 12 of those 72 hours Dried to at least 50% TS |
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What is the easiest of the seven processes to further reduce pathogens? |
Heat treatment: Liquid biosolids are heated to 180 C or higher for at least 30 min |