REHS Exam - Wastewater Treatment Questions and Answers 100% Correct(RATED A+)

What are the treatment processes in PRELIMINARY Wastewater Treatment? - ANSWER-Screening Comminution Grit Removal Pre-Aeration Flow Metering / Sampling What are the treatment processes in PRIMARY Wastewater Treatment? - ANSWER-Sedimentation / Flotation What are the treatment processes in SECONDARY Wastewater Treatment? - ANSWER-Biological Treatment (ie activated sludge, trickling filters, rotating biological contactor (RBC)) Sedimentation What are the treatment processes in TERTIARY Wastewater Treatment? - ANSWER-Filtration Chemical / biological treatment of nutrients Sedimentation (optional) What are the treatment processes in the DISINFECTION step in Wastewater Treatment? - ANSWER-Chlorination Ultraviolet Ozone What are the treatment processes in the SOLIDS TREATMENT step in Wastewater Treatment? - ANSWER-Dewatering Digestion Disposal What are the steps in the Wastewater Treatment Process? - ANSWER-Preliminary Treatment (screening, comminution, grit removal, pre-aeration, flow metering/sampling) Primary Treatment (sedimentation/flotation) Secondary Treatment (biological treatment, sedimentation) Tertiary Treatment (filtration, chemical/biological treatment of nutrients, sedimentation (optional)) Disinfection (chlorination, ultraviolet, ozone) Solids Treatment (dewatering, digestion, disposal) What are some diseases that are common concerns in wastewater? - ANSWER-Cholera, dysentery, salmonella, typhoid fever mainly Less commonly, anthrax What are some protozoa that are concerns in wastewater? - ANSWER-Giardia and Cryptosporidium What are some viruses that are common concerns in wastewater? - ANSWER-Polio and Hepatitis What is NJ's ultimate goal for wastewater treatment? - ANSWER-The protection of NJ's waterways (receiving streams). All waterways fishable, swimmable, and drinkable. What is the purpose of wastewater treatment? - ANSWER-Remove solids Stabilize organic matter Remove pathogenic organisms What are some examples of inorganic wastes? - ANSWER-Salts, metal, gravel, sand What are the usual sources of inorganic wastes? - ANSWER-Nature and Industry Define organic waste - ANSWER-Carbon based and can be broken down biologically