Theoretical/ Expected Alkalinity consumed vs Experimental alkalinity consumed.
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Theoretical/ Expected Alkalinity consumed vs Experimental alkalinity consumed.
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- Treatment plant questionsThe results of a jar test on a surface water supply sample revealed that the optimum dose of alum (Al2(SO4)3.14H2O) as coagulant is 17 mg/L. Furthermore, the water has total alkalinity = 50 mg/L as CaCO3; pH = 7.8; and residual turbidity at optimum alum dose = 4 NTU. The water treatment plant has a mean flow of 10m3/hour. Determine: The kg of alum per year needed in the operation of the plant. The residual alkalinity in the sample, following the addition of alum at optimum dose. Solve parts (a) and (b) if instead of alum, ferric chloride (FeCl3) were used as coagulant. Assume the numerical jar test results are the same as those with alum.Determine the exact and approximate alkalinity of a water sample that contains 120.0 mg/L of (CO3)^2- and 75.0 mg/L of (HCO3)^- at a pH of 9.7 at 25 degrees Celcius
- A surface water treatment plant operates round the clock with a flow rate of 35 m³/min. The water temperature is 15 °C and jar testing indicated an alum dosage of 25 mg/1 with flocculation at a Gt value of 4x104 producing optimal result. The alum quantity required for 30 days (in kg) of operation of the plant is6. A tertiary treatment plant treats a municipal secondary effluent and is to employ fixed-bed carbon adsorption columns. Parallel treatment using two rows of two columns in series (in other words, a total of four columns) will be used. From batch-type slurry tests it has been found that 0.42 g COD/g carbon is adsorbed when Ce = Co. Pertinent data are as follows: flow = 5700 m³/d, COD in feed to carbon columns = 20 mg/L, contact time function based on an empty carbon bed = 30 min, and unit liquid flow rate= = 4.4 L/s-m². Each column is kept on-line until the entire mass of carbon in the column is completely exhausted. Determine: The volume of each column, m³. a. b. Page 2 of 3 C. d. e. The diameter and height of each column, m. The mass of carbon in each column if the packed density is 400 kg/m³. The kilograms of carbon exhausted per day if the COD removed is assumed to be 98%. The on-line time for each of the columns.A surface water treatment plant operates round the clock with a flow rate of 35 m³/min. The water temperature is 15 °C and jar testing indicated an alum dosage of 25 mg/l with flocculation at a Gt value of 4 × 10ª producing optimal results. The alum quantity required for 30 days (in kg) of operation of the plant is
- The analysis of water quality from an artesian well presented the result Alkalinity atbicarbonates equal to 24 (mg/L CaCO3), the pH of 7.0, the concentration of Ca+2 equal to 14 mg/L and theMg+2 concentration equal to 20 mg/L.Knowing that the equivalent weight of CaCO3 is equal to 50, of Ca+2 equal to 20 and of Mg+2 equal to 12.It is concluded that the permanent and temporary hardness, respectively, are: (A) 24mg/L (CaCO3) e 118 mg/L (CaCO3).(B) 94 mg/L (CaCO3) e 24 mg/L (CaCO3).(C) 24 mg/L (CaCO3) e 94 mg/L (CaCO3).(D) 94 mg/L (CaCO3) e 118 mg/L (CaCO3).only HANDWRITTEN answer needed ( NOT TYPED)An impellar blade unit operates at 50 rpm. Determine the degree of mixing? Also if the blade operates from 50 rpm to 100 rpm what is the percent increase?
- 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 isHow does an estimate of chlorinity allow us to determine salinity? Explain what principle is involved and what this principle means.Determine the pH of a solution that contains 2*(10^-4) mg/L of OH- (at 25 degrees).