BIOL241 Study Guide - Midterm Guide: Fecal Coliform, Waterborne Diseases, Coliform Bacteria
14 Apr 2014
School
Department
Course
Professor
Document Summary
Biol 241 introduction to applied microbiology. Small- scale, not meant to handle a lot of waste. Influent goes into septic tank found below ground surface, where the solids settle and limited anaerobic digestion occurs. Fluid flows from the distribution box into leaching field/tile bed then gravity causes it to trickle down through the soil. Sieving effect as material moves through soil naturally purifies the system: works best with medium- porosity soils such as loams. If sandy soil, flows too fast and is discharged into receiving body before naturally cleaned. Lecture 9: drinking water treatment. Filtration removes all remaining particulates, most organic and inorganic compounds, microorganisms: critical to removal of disinfectant- resistant microbes like giardia and. Uv, temperature fluctuations, disinfection: present in greater numbers than pathogen, detectable via easy, rapid, inexpensive methods, non- pathogenic, shouldn"t multiply in the environment. Cryptosporidiosis and giardiasis: common waterborne diseases in areas with regulated water supplies. Ingested oocysts germinate into sporozoites, which become trophozoites.
