You are treating 10 million gallons per day (MGD) of water with alum at a dosage of 50.0 mg/L. Alum is available as a hydrated salt Al2(SO4)3.16H2O. Determine:(a) The monthly alum dosage required in metric tons/month (1 metric ton = 1000 kg)(b) If you assume that each equivalent of alum added to the water consumes 1 equivalent of alkalinity, determine the alkalinity consumed by alum addition in milliequivalents/L (meq/L)(c) Given that the raw water contained 30 mg/L as CaCO3 of alkalinity, is the alkalinity sufficient? What would happen if the alkalinity is inadequate?

You are treating 10 million gallons per day (MGD) of water with alum at a dosage of 50.0 mg/L. Alum is available as a hydrated salt Al2(SO4)3.16H2O. Determine:(a) The monthly alum dosage required in metric tons/month (1 metric ton = 1000 kg)(b) If you assume that each equivalent of alum added to the water consumes 1 equivalent of alkalinity, determine the alkalinity consumed by alum addition in milliequivalents/L (meq/L)(c) Given that the raw water contained 30 mg/L as CaCO3 of alkalinity, is the alkalinity sufficient? What would happen if the alkalinity is inadequate?

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter20: Hydrogen

Section: Chapter Questions

Problem 4P

See similar textbooks

Similar questions

Determine the amount of coagulant required per day (kg/day).• Assume that the optimum dosage of alum at 25 mg/L was used and that the density of alum was 600kg/m3, Power = 1736.3 watt, Volume= 10.83 m^3 , water temperature is 20 oC, and velocity Gradient is 400 1/s.• Amount of alum = ? (kg/month)• Volume of alum = ? (m3/month)
You have been contracted to determine the characteristics of raw water at 20°C. You complete a chlorine dosing experiment to aid in designing your chlorination process (Figure Below).a. What is the breakpoint chlorine dosage?b. What is the chlorine demand at a chlorine dosage of 1.2 mg/L?c. For a plant that processes 10 m3/hr, how much chlorine should I add per day to reach a constant residual chlorine concentration of 0.7 mg/ld. Design a chlorine contact tank that would achieve the required Ct value for a 3 log deactivation of Girardia (Ct = 54 mg/l min).
A water treatment plant with an average flow of Q = 0.8 m3/s treats its water with alum at a dose of 27 mg/L. Alum (Al2(SO4)3. 14.3 H2O) coagulation is used to remove particulate matter, reduce the concentration of organic matter, and reduce the alkalinity of the water. Determine the total mass of aluminum hydroxide (Al(OH)3) consumed per day (kg/d, no decimal point) (atomic mass: Al: 27, S: 32, H: 1, O: 16).
A water treatment plant with an average flow of Q = 0.5 m3/s treats its water with alum at a dose of 34 mg/L. Alum (Al2(SO4)3. 14.3 H2O)coagulation is used to remove particulate matter, reduce the concentration of organic matter, and reduce the alkalinity of the water. Determine the total mass of alkalinity (HCO3-) consumed per day (kg/d, no decimal point) (atomic mass: Al: 27, S: 32, H: 1, O: 16, C: 12)
Calculate the exact alkalinity (in mg/L as CaCO3) of a water containing 120.0 mg/L of bicarbonate ion and 15.00 mg/L of carbonate ion. The water has a pH of 9.4.
Example Treatment plant with capacity 50*106 l/day. This treatment plant required 20 mg/l alum. If the water alkalinity as CaCO3 is 6 mg/l. Find the yearly alum quantity and the quantity of CaO which is used as coagulant aid? Atomic weights: Al=27, O=16, H=1, C=12, Ca=40
Choose the correct answer 200 g CO2 approximately takes up ____ L volume in air at 1 atm and 0oC? 4480; 100; C. 200; D. Undetermined Which of the following gases has the greatest contribution to the greenhouse effect on the Earth? A. Water vapor; B. CO2; C. CH4; D. O3 Based on what you have learned, which of the following can contribute(s) greenhouse gases? A. landfills; B. a deep lake with organic rich sediments; C. septic tanks; D. all of the above Which of the following gases is NOT a greenhouse gas? A. methane; B. carbon monoxide; C. hydrofluorocarbons; D. water vapor
PLEASE ANSWER QUESTION D You have been contracted to determine the characteristics of raw water at 20°C. You complete a chlorine dosing experiment to aid in designing your chlorination process (Figure Below).a. What is the breakpoint chlorine dosage?b. What is the chlorine demand at a chlorine dosage of 1.2 mg/L?c. For a plant that processes 10 m3/hr, how much chlorine should I add per day to reach a constant residual chlorine concentration of 0.7 mg/ld. Design a chlorine contact tank that would achieve the required Ct value for a 3 log deactivation of Girardia (Ct = 54 mg/l min).
If the chlorine demand for a water is 3.0 mg/L, and the breakpoint is at 3.0 mg/L, what would the amount of chlorine that would need to be added in (in mg/L) if you desired to have a free chlorine residual of 2.0 mg/L in the water?
Calculate the pH and alkalinity (in mol/L) of a water that contains 120.0 mg/L of bicarbonate ion and 15.00 mg/L of carbonate ion.
Design of a community biogas plant for a village consisting of 114 families, each family consisting of 5 persons (adults). Two children are equivalent to one person. Village survey report gives the following information’s about cattle’s Cows 185 (10 kg/day); Oxes 135 (12 kg/day); Buffalo 75 (15 kg/day) ; pig 10 ( 3 kg/day); Gas produced from 1 kg of gobar in winter and summer 42 litre and 55 litre. Gas required for cooking/person/day = 0.227 m3 ,Gas required for lighting 100 cp lamp per hour = 0.126 m3 Each family is allotted 2 lamps, which would burn 3 hours daily, Density of slurry 1090 kg/m3 and retention time 35days. Design the following parameters (i) gas required for cooking& Lighting (ii) Diameter of digester Diameter d=
QUESTION: An industrial wastewater from glucose production facility will be treated in an activated sludge treatment process. It is determined that 90% of glucose is biodegradable. It is also tested that the activated sludge treatment provides 100% BOD removal. This wastewater initially contains 2000 mg/L of glucose (C6H12O6), but no other organic and inorganic species. a) Calculate input TOC, COD and BOD of wastewater before treatment.b) Calculate output TOC, COD and BOD of wastewater after treatment.