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5 Written questions

4 Matching questions

  1. anaerobic sludge digester
  2. Staphylococcus aureus
  3. flocculation
  4. primary treatment
  1. a take care of solids leftover from secondary treatment. Rate of digestion is slower than secondary, metaoblism is less efficient, but faster if warmer. Heated to 95-100F. Does reduce final volume of solid, Some molecules can only be decomposed by this. End product: carbon dioxide and METHANE
  2. b (species) bacteria that grow in food, orginally from skin. Secrete toxin into food that induces vomiting and diarrhea. Self-limiting. Associated with SALTY foods.
  3. c occurs throughout secondary treatment. Reduce pathogen by_________________
  4. d physical separation. Some "biosolids" sink, some floats: grease, oil. Skimmed off. Reducing total amount of organics remaining in water. Little microbial activity involve

5 Multiple choice questions

  1. (species) bacteria found in soil. Anaerobic in can food. Causes paralysis
  2. end product of anaerobic sludge digester. Organics will be fermented or organic acids + carbon dioxide. It is then converted to _________ by methanogens.
  3. high energy/ionizing radiation. Gamma rays. Knock electrons away from atoms. Creates very reactive free radicals that damage cell components. Kills cells
  4. (genus)-associated with poultry. Meant-contaminated during slaughtering and eggs that pass through cloaca.
  5. Organic acids-often naturally produced in fermented foods. Foods naturally preserved. (cheese)

5 True/False questions

  1. nitrates and nitritesin body, we convert nitrites and nitrates to ______ which is CARCINOGENIC.


  2. 63C for 30minslow temp, long time (LTLT)


  3. intermediate(genus) bacteria associated with unpasteurized cheese and "pre-cooked meats"-hot dogs, deli meats


  4. 90-95%canning temperature needed for high acid foods (pH<4.5). Kills all vegetative cells. If spores survive, can't germinate at low pH


  5. antioxidantsin body, we convert nitrites and nitrates to ______ which is CARCINOGENIC.