Wastewater treatment Study guides, Class notes & Summaries

Preliminary Treatment (Ans- the 1st stage of sewage treatment where large debris, such as sticks, grit, and rags pas through a screen followed by a grit chamber, where the flow of water is slowed enough to allow for sedimentation. What stage of treatment is grit removal usually accomplished in? (Ans- preliminary treatment Rotating Biological Contactor (Ans- a type of biological secondary treatment process How are protozoa (cause of amoebic dysentery) destroyed? (Ans- disinfectio...

Wastewater Practice Test (Florida) English Exam Questions And Answers According to FDEP chapter 62-600.440 (4) (b) FAC, basic level disinfection is described as: - ANS A chlorine residual of 0.5 mg/L for 15 minutes at peak hourly flow FDEP chapter 62-604.550 (a) FAC, requires a wastewater spill shall be verbally reported to the state warning point no later than: - ANS 24hrs from discovery What is the 'rule of thumb' regarding pump packing? - ANS Never put rings of new pack...

As an operator, you are responsible to your employer for maintaining an economical and efficient operating facility. (Ans - TRUE An operator has an obligation to the great numbers of people who rely on down stream water supplies and are totally dependent on the operator's competence and trust worthiness for their welfare (Ans - TRUE Today, the natural purification processes in rivers treat all the waste loads and keep rivers clean. (Ans - FALSE Operators are water quality protectors...

Wastewater Treatment Class I Questions and Answers 100% Correct Wastewater Treatment Class I Questions and Answers 100% Correct Wastewater Treatment Class I Questions and Answers 100% Correct Wastewater Treatment Class I Questions and Answers 100% Correct a) alert the operator on duty Always alert the operator on duty before shutting down any equipment so as to prevent the possibility of harming personnel or affecting process performance as a result of the shutdown. - ANSWER...

What is the methane content in a properly operation anaerobic digester? A) 30 to 35% by volume B) 1 to 2% by volume C) 65 to 70% by volume D) 15 to 20% by volume (Ans- C) 65 to 70% by volume (v.2 pg 158) What will the addition of chlorine gas do to the pH of wastewater? A) Moderately increase pH B) pH will not be affected C) Significantly increase the pH D) Decrease the pH (Ans- D) Decrease the pH (v.1 pg 349-350) What is the purpose of a Parshall flume? A) measure turb...

BIO 250 Final Exam (Microbiology) | 60 Questions With 100% Correct Answers | Latest Update | Graded A+. What microbial process was responsible for changing Earth’s atmosphere from one without oxygen to one with oxygen? Select one: a. anaerobic respiration b. decomposition c. oxygenic photosynthesis d. temperature regulation In the nitrogen cycle, which of the following phases involves the release of nitrogen as into the Earth’s atmosphere? Select one: a. ammonication b. denitrica...

Preliminary Treatment - Answer-the 1st stage of sewage treatment where large debris, such as sticks, grit, and rags pas through a screen followed by a grit chamber, where the flow of water is slowed enough to allow for sedimentation. What stage of treatment is grit removal usually accomplished in? - Answer-preliminary treatment Rotating Biological Contactor - Answer-a type of biological secondary treatment process How are protozoa (cause of amoebic dysentery) destroyed? - Answer-disinfe...

Wastewater Treatment Operator Certification Test.

An Imhoff cone is used to measure________solids. A. suspended B. colloidal C. volatile D. settleable (Ans- D. settleable (Operation of Wastewater Treatment Plants, Volume 1 by Kenneth D. Kerri) A _____ flume is widely used for measuring wastewater flow. (Ans- Parshall (Operation of Wastewater Treatment Plants, Volume 1 by Kenneth D. Kerri) Velocity of flow in a grit channel must be reduced to a range of ____ to _____ fps in order for grit to properly settle. (Ans- .7 to...