1. A flow of 1.1 MGD is applied to 50 ft diameter trickling filter, which is 4 feet deep. The BOD of the wastewater applied to the filter is 120 mg/L. Calculate the hydraulic loading on the filter. 2. A flow of 1.1 MGD is applied to 50 ft diameter trickling filter, which is 4…
1. The main operational goal in anaerobic digestion is to _. a. maintain a suitable environment for bacteria to treat the sludge b. oxidizing the organic and inorganic material not removed by other process c. produce fuel for other plant processes d. reduce the total suspended solids load by 50 to 60 percent 2. Observation…
1. Chlorella, Chlamydomanas, and Euglena are common _ found in wastewater lagoons. a. bacteria b. alage c. fish d. water fowl 2. Methane fermentation in wastewater lagoons consists of _. a. the conversion of organic material to methane by bacteria b. the reduction 5 day BOD by coliform bacteria c. the conversion of algae into…
REPORTING OF CONCENTRATION The example Daily Operations Log shows that four individual BOD5 grab samples were obtained during the month as follows: March 3 – 22.00 mg/L March 10 – 29.00 mg/L March 17 – 18.00 mg/L March 24 – 10.00 mg/L The daily average concentration is calculated by adding the four values obtained and…
ANNUAL AVERAGE FLOW The arithmetic average of all daily flow determinations taken within the preceding 12 consecutive calendar months. The annual average flow determination shall consist of daily flow volume determinations made by a totalizing meter, charted on a chart recorder and limited to major domestic wastewater discharge facilities with a 1 million gallons per…
ORIGIN OF ENVIRONMENTAL, SAFETY AND HEALTH REGULATIONS In the past, state and federal governments did not regulate the disposal of domestic and industrial wastewaters. This situation led to disposal practices that left much to be desired. Municipal wastewater was simply dumped into rivers and lakes and industrial wastes were buried, discharged to surface waters and…
SCHEDULES/REPORTS In addition to DMRs and non-compliance reports (NCRs), the permit or formal enforcement actions may contain additional reporting provisions, with specific reporting requirements. These specific provisions could include compliance schedules with progress reports, pretreatment requirements, toxicity, sludge, storm water, etc. The actual completion date of any scheduled activity must be included in the submitted…
1. Convert a flow of 600 gallons per minute to million gallons per day 2. Convert a Flow from 1.2 MGD to cubic feet per second 3. Estimate the velocity of wastewater flowing through a grit channel if a stick travels 32 feet in 36 seconds. 4. A grit channel removed 3.2 cu ft of grit…
1. The dissolved oxygen concentration should normally _ as you proceed through the stages of the RBC system. a. increase b. decrease c. remain the same 2. Which one of the following is a set of processes, all of which are variations of the conventional activated sludge treatment process? a. high rate/aerated detrition/extended aeration b….
NON-COMPLIANCE REPORTS (NCRS) The Permittee shall report any instances of non-compliance with their permit. See your permit for specific requirements for reporting anticipated non-compliance, 24-hour reporting of conditions which may endanger health and the environment (via phone, e-mail or fax) and other non-compliances which must be reported. This report must include the following information: 1….
