SWES 210 1st Edition Lecture 10Outline of Last Lecture I. Beginning of new material for exam 2Outline of Current Lecture II. Pathogens and waterborne diseasesa. Fecal coliformb. Pathogens are most sever to human healthIII. Pathogens and human health problemsa. 1 billion people without safe water. 2.6 billion has inadequate sanitary water facilitiesb. solutionsIV. how we treat our wastewatera. septic systemsb. treatment facilitiesi. steps for water treatmentii. products of treatmentCurrent Lecture- Pathogens and waterborne diseaseso Enter water supplies through inadequately treated human waste and animal waste o Fecal coliform bacteria indicate fecal contamination (they are not pathogenic organisms)o Bacterial pollution causes more human health problems than any other type of water pollution (conditions are improving) 86% people world wide now have safe water- pathogens and human health problemso 1 billion people worldwide are without safe watero 2.6 billion have inadequate sewer or sanitary facilities (kills 5 million people a year)o solutions disinfect drinking water treat sewage public education to encourage personal hygiene government enforcement of regulations protecting foodo the type of water pollution that causes the most sever human health problems= pathogenso the presence of fecal coliform bacteria in drinking water indicates= other diease causing pathogens may be present- how do we treat our wastewaterThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o wastewater= water people have used in some way household, manufacturing, stormwater runoff, ect it is treated before being released into the environmento septic systems= the most popular method of wastewater disposal in rural areas underground septic tanks separate solids and oils from wastewater the water drains into a drain field, where microbes decompose the pollutants solid waste is periodically pumped out and landfilledo screens and grit tank remove rags and grito primary clarifier= oils greases and solids removedo aeration basin microbes consume organic mattero secondary clarifier= remaining oils, greases, and solids removedo filtering disinfection= water treated with chlorine (and/or UV light) is piped into rivers or the oceano products of treatment: sludge= solid material decomposed microbially then landfilled methane rich gas created by decomposition can be burned to generate electricity reclaimed water is used for lawns, irrigation, or
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