Wastewater Operator 4 test prep| 300 questions| with complete solutions

Heterotrophic Correct Answer: uses organic compounds (BOD) for their carbon source Autotrophic Correct Answer: • use CO2 as their carbon source • Makes own food • nitrifiers • Use alkalinity as carbon source • Convert ammonia to nitrite and nitrate • Redox potential of +200 Bacteria shape round Correct Answer: cocci Bacteria shape rods Correct Answer: bacilli Bacteria shape spiral Correct Answer: spirilla • Freely dispersed bacteria Correct Answer: o often don't settle and leave as TSS o favor high organic load o favor low dissolved oxygen • Floc forming bacteria Correct Answer: o Stick together and settle out o Degrade BOD • Filamentous bacteria Correct Answer: o Caused by low DO Protazoa Correct Answer: single cell Metazoa Correct Answer: multi-cell Does Heterotrophic or Autotrophic use organic compounds (BOD) for their carbon source Correct Answer: heterotrophic Does Heterotrophic or Autotrophic use CO2 as their carbon source Correct Answer: Autotrophic Does Heterotrophic or Autotrophic make own food Correct Answer: Autotrophic Are Heterotrophic or Autotrophic nitrifiers Correct Answer: Autotrophic Does Heterotrophic or Autotrophic use alkalinity as carbon source Correct Answer: Autotrophs Does Heterotrophic or Autotrophic Convert ammonia to nitrite and nitrate Correct Answer: Autotrophs