A surface water treatment plant operates round the clock with a flaw rate of 35 m3/min. The water temperature is 15°C and Jar testing indicated and alum dosage of 25 mg/l with flocculation at a Gt value of 4 x 104 producing optimal results. The alum quantity required for 30 days (in kg) of operation of the plant is
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![A surface water treatment plant operates round the clock with a flaw rate of 35 m3/min.
The water temperature is 15°C and Jar testing indicated and alum dosage of 25 mg/l with
flocculation at a Gt value of 4 x 104 producing optimal results. The alum quantity required
for 30 days (in kg) of operation of the plant is](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5e2ff7d1-49c5-4988-be64-b5ab5aeaa8e5%2F86f070c2-1722-453d-8bb7-9ed58ee4cce6%2Ftrha8q_processed.jpeg&w=3840&q=75)
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- Nicotiana tabacum cells are cultured to produce a polysaccharide gum. The reactor used is a stirred-tank reactor with an initial volume of 100 L. The maximum specific rate of growth of the culture is 0.18 d-1 and the yield coefficient of substrate in biomass is 0.5 gX/gS. The concentration of the limiting substrate in the medium is 3% (m/v). The reactor is inoculated with 1.5 g/L of cells and operated in batch until the substrate is exhausted, when the medium is fed with a constant flow rate of 8 L/d. The fed batch occurs in a quasi-steady state condition.a) Estimate the time of the batch step and the concentration of cells reached in this phase, considering exponential cell growth.b) The fed batch phase is carried out for a period of 40 days. What is the final concentration of cells in the reactor?c) The bioreactor is available for the process for 275 days a year, with an interval of 24 hours between each cultivation. What is the most advantageous operating mode for the process…What is biochemical oxygen demand (BOD) test? At what stage of Sewage treatment this test is performed? BOD level of three samples of water labelled as A, B and C are 30 mg/L, 10mg/L and 500 mg/L respectively. Which sample of water is most polluted?A 10-L stirred tank is used to cultivate mouse myeloma cells. Dry air is sparged from the bottom at 1.0 L/min to supply oxygen to the system. The gas composition at the outler is 16% oxygen, 3.5% CO2, 6.5% water vapor, and balanced nitrogen. The ambient pressure and temperature are 1 atm and 37 °C, respectively. The dissolved oxygen in the reactor is controlled at 20% of saturation with ambient air. What is the respiratory quotinent (RQ) (i.e., mole CO2 produced/mol O2 consumed)? Assume that the mole fraction of CO2 in the ambient air is negligible. The universal gas constant R = 0.082 L*atm/mol*K
- A 10-L stirred tank is used to cultivate mouse myeloma cells. Dry air is sparged from the bottom at 1.0 L/min to supply oxygen to the system. The gas composition at the outler is 16% oxygen, 3.5% CO2, 6.5% water vapor, and balanced nitrogen. The ambient pressure and temperature are 1 atm and 37 °C, respectively. The dissolved oxygen in the reactor is controlled at 20% of saturation with ambient air. a. Assuming the reactor is at a steady-state, what is the volumetric oxygen transfer coefficient (kLa)? b. The specific OUR of myeloma cells is 5*10-11 mmol/cell*h. What is the cell concentration? c. What is the respiratory quotinent (RQ) (i.e., mole CO2 produced/mol O2 consumed)? Assume that the mole fraction of CO2 in the ambient air is negligible. The universal gas constant R = 0.082 L*atm/mol*KCompute the cfu/g (lactic acid bacteria and coliforms) of burong mustasa samples given the following values below. Show your solution. 1st Sampling 2nd Sampling Media 10-2 10-3 10-4 10-2 10-3 10-4 TNTC. 252, 248, VRBA 28, 22, 31 26, 33 0, 0 0, 0 TNTC 232 0, 0 TNTC, TNTC TNTC, TNTC MRS 38, 42 0,0 152, 132 Volume plated: 0.1mlSuppose i want to prepare or manufacture 1 litter of hand wash, for this can you please provide me a master formulae for this? Please mention all the ingredients along with the percentage and also the standard operating procedures (SOP) step by step process? I will rate you positive if you do so.
- The phenol concentration of wastewater was determined from three (3) parallel determinations, giving a mean of 0.513 μg L-1 and a standard deviation of 0.05 μg L-1. Decide at a risk level of 5% (or a confidence level of 95%) whether a reference value of 0.520 μg L-1 is statistically different.You are tasked to prepare 1000mL of 2 media preparations, however, instead of using a powder agar, you will be preparing the desired concentration from a prepared stock solution. Complete the information in the table and show your computation. Volume of Volume of diluent Desired Stock Solution stock sol'n needed to make Concentration needed 1000mL media 25% 12.5% 5% 1.5%(b) A Food material containing Bacillus stearothermophilus PS1518 as an indicator organism ts subjected to heat sterilization at 121 C. Calculate the time required to reduce the organism to one tenth of the original number. Fo value for the organism is 4 minutes and the decimal reduction time , D, at 116°C is 40 minutes. Assume operation is at constant temperature of 121°C. HINT Fo = -To 10 dt Where Fo = equivalent exposure time at 121°C of the actual exposure time at a variable temperature To = the reference temperature =121 C, z=10 = number ofC necessary for10fold increase in F
- a dosage of 1,700mg of cefadroxil is to be delivered to a patient in an IV drip over 75 minutes. It's supplied in a solution that contains 1 gram of the drug in 20cc of solution. The pump used to deliver the drug uses units of cc's per hour. at what rate should it be set?A 15kg doe diagnosed with pregnancy toxaemia requires a dextrose fluidsupplementation. Given a dosage of 0.2ml/kg of body weight, prepare a 5%dextrose solution from a stock solution of 50%.Suspend 28.0 grams in the 1000 mL distilled water. Heat to boiling to dissolve the medium completely. Sterilize by autoclaving at 15 lbs pressure (1210C) for 15 minutes. Cool to 45-500C. If desired the medium can be enriched with 5-10% blood or other biological fluids. Mix well and pour into sterile Petri dishes. 1. Determine the amount of dehydrated medium needed to prepare 50 nutrient agar plates. Include amount for 2 additional plates as excess to compensate for compounding losses.