MPN of effluent is 10/100 ml and it reduces to 102/100 ml after chlorination. Find percentage removal (%R) and log removal (logR) of MPN.
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- Briefly elaborate on; (a)The purpose having rapid mix process in figure b)The benefit having disinfection process as in figureQ2: Determine the resultant about the point O of the four forces and one couple which act on the plate shown in the Figure below. Note : for the resutant of 3osihys Forc es, You should computy the magnitude Kdirechion 30N 5 m- 3 ocos4s 25N 2 m 70 N-m 20N 40N o 30Anaerobically treated effluent has MPN of total coliform as 106/100 mL. After chlorination, the MPN value declines to 10²/100 mL. The percent removal (%R) and log removal (log R) of total coliform MPN is
- Il Consider the capability of a process that puts pressurized grease in an aerosol can. The design specification calls for an average of 50 pounds per square inch (psi) of pressure in each can with an upper tolerance limit of 56psi and a lower tolerance limit of 46psi. A sample is taken from production, and it is found that the cans average 51psi with a standard deviation of 2psi. Find the following unknowns. 1. Capability Index (Cpk) 2. Is the process capable at the 30 level? 3. What is the probability of producing a defect? Hind: use the standard normal table as seen below.A sample is diluted to perHorm test 295 mL distilled water are added to 5mL sample to fill 300ML BOD bottle. Inifial dissolved oxygen concentration is 7.9 mg/L in the bottle After mcubating 5 days, dissal ved oxygen carcentvation 1s 45 mg/L- Determine 5-day BOD OF the wastewae- Deoryge nation rate Constant, k, is C.013 day- Evaluate ultimate BOD Of the wastewCHer.1. A commercial laundry is consdiering constucing an ion exchange process to remove hardness from water used in laundering oerpations. The laundry uses 1000 m³/d of city water with Ca²+ at 4.5 meq/L and Mg²* at 2 meq/L. Their goal is to reduce total hardness (TH) to 1 meq/L. The softening resin has a TH capacity of 60 kg-TH/m³ of media with a recommended hydraulic loading rate of 0.4 m³/(m² min). Renegeration can be accomplihsed using 100 kg NaCl per m³ of ion exchange media in a 15% solution at a hydraulic loading rate of 0.04 m³/(m² min). The exchanger tanks available to the laundrey have a diamter of 1 m. What is the total bypass-water flow rate (m³/d)? What is the total daily resin volume required to soften the water (m³/d)? How many exchanger tanks are required for a one-day operation cycle? What is the resin bed depth (m) in each exchanger tank? What is the daily volume of NaCl regenation solution used per tank (m³/d)? What is the time period required for resin regeneration in…
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