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)

Q: An effluent at a flow rate of 3000 m3/d from a sewage treatment plant is to be disinfected. The…

A: To Find :- killing efficiency of micro-organisms.

Q: It is found in a water sample that it has insufficient alkalinity and therefore soda ash (Na2CO3) is…

A:

Q: treatment system treating 1.0 m3 /s of water includes a filter followed by a  chlorine contact…

A: We have to find concentration of pathogens in outlet of chlorination tank and volume of chlorination…

Q: As a design engineer, you have been hired to address water hardness problems in the town of St.…

A:

Q: Consider a pollutant whose concentrations follow a normal distribution with a mean of 5 ppm. It is…

A: GIVENmean=5ppmPX>6.165=1%using standard nomal distribution…

Q: Disinfection: Graph the following data for the inactivation of a virus using hypochlorous acid…

A: The data for inactivation of a virus using HOCl is as followsThe graph has to be plot and time…

Q: = A waste stabilization pond is used to treat a dilute municipal wastewater before the liquid is…

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Q: A wastewater treatment plant must disinfect its effluent before discharging the wastewater to a…

A: Given data: Initial concentration of California colony (Co) = 5.5 x 105 CFU/L. Maximum California…

Q: If the alum dose required to coagulate is 10 ppm, find out the amount of alum (in quintals) needed…

A:

Q: When drinking water is disinfected with chlorine an undesired byproduct, chloroform, is formed.…

A: Given data70-kg person drinks 2 L of water every day for 70 years chloroform concentration =0.1 mg/L…

Q: 01: A sample of industrial waste water have BOD: (1254 6mg/L) and biological oxidation (3.4 day) at…

A: biological oxygen demand - the amount of oxygen required for the decomposition of bio degradable…

Q: The wastewater to be treated is flowing into the treatment plant at a rate of 2670 m3/day. The…

A: Given: Discharge, Q = 2670 m3/day Dosage of chlorine = 15 mg/lt Percentage of microbes to be removed…

Q: A sample of wastewater is mixed with 2 parts clean water and placed in a bottle. The pO of a sample…

A: Given data in question  Dissolved oxygen  Reaction rate constant  To find out  BOD5

Q: The US Environmental Protection Agency (EPA) places limits on the quantities of toxic substances…

A: The problem is asking us to find the maximum permissible molarity of potassium dichromate (K2Cr2O7)…

Q: The wastewater having an organic concentration of 54 mg/l is flowing at a steady rate of 0.8 m³/day…

A: Given data- Organic concentration- Lo=54 mg/L,Q=0.8 m3/day,dimension 2 m×4 m×2 m.decay constant…

Q: 13. In the treatment of 25 x 10³ m³/day of water, the amount of chlorine used is 15 kg/day. The…

A: Asked: To compute the chlorine demand.   Given: Flow rate = 25×103 m3/day Amount of chlorine used or…

Q: A family consists of an adult male weighing 70 kg, an adult female weighing 50 kg, and a child…

A: Given: The weight of the male is 70 kg. The weight of the female is 50 kg. The weight of the child…

Q: Determine the rate constant of a pesticide which has a half life of 9 days. Also determine the time…

A: Given: Half-life of pesticide, t1/2 = 9 days

Q: 2. You are asked to design a disinfection system with a capacity of 50,000 L/hr to achieve 3 log…

A: To determine the volume and dimensions of a chlorine contactor without assuming the length and…

Q: Problem 3: A water treatment with an average flow of 2.84 m3/s treats its water with ferric chloride…

A:

Q: An effluent at flow rate of 2670 m3/day is to be treated. The dosage of chlorine is 15 mg/lt and the…

A: Given: Flow rate = 2670 m3/day Chlorine dosage = 15 mg/lt Disinfection model = Nt = Noe-0.145t

Q: correct answer

A: 1)  Rotating biological contractor is casually known as RBC is a fixed film treatment process used…

Q: Problem 1. The quality of a surface water will be assessed for its suitability for drinking,…

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Q: Use the table below to calculate the following: The concentration (in mg/L and mol/L) of the…

A: Calculate formula weights (FW) for Al2O3 and Al2(SO4)3.14H2O Take molecular weight of Al=27 g/mol,…

Q: A chemical is added at the beginning of a water treatment plant at a target concentration of 8 mg/L…

A: Daily water required = Amount of population * Per capita demand Amount of population = 340,000 Per…

Q: atch Reactor with a volume of 11.859 m³ is being used to treat liquid waste from a small seafood…

A: According to given data  Every week 1.461 kg of waste is added to the reactor with water, so that…

Q: Particle emissions in a house. The power goes out in your apartment (volume = 150 m3) at night, so…

A: Note-Since we answer three subpart at a time so we will answer the first three. Please resubmit…

Q: A sample of wastewater is mixed with 2 parts clean water and placed in a bottle. The DO of a sample…

A: Given data : The value of initial dissolved oxygen D.Oi=10 mg/L The value of Final dissolved oxygen…

Q: You are asked to complete an investigation into the efficiency of removal of your toilet. The bowl…

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Q: For Giardia, a typical Ct value is 1000 for chloramines and 25 for free chlorine. Which disinfectant…

A: Ct value is known as concentration contact time. It is obtained by making a product of the…

Q: Families in a community in a developing country use large, 200.0 L drums to un-treated surface…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: The half-life of lodine-131 (I-131) is 8 days. If 294 grams of I-131 were released to the…

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Q: find the hazard index associated with this exposure?

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Q: Problem 2) Problem 5-3: What is the concentration of NH3 (in mg/L) of household ammonia that…

A: Household ammonia, which is also referred to as ammonium hydroxide (NH4OH), typically represents a…

Q: If the alum dose required to coagulate is 10 ppm, find out the amount of alum (in quintals) needed…

A: Given data- Water to be treated Q=10 MLD=10×106 litres/dayAlum dose=10 ppm=10 mg/LTo Find-Amount of…

Q: 3. A solution is known to contain 42 mg/L of C6H₁2O6. Determine the theoretical oxygen demand.

A:

Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.