Tomato juice flowing through a pipe at the rate of 100 kg/min is salted by adding saturated salt solution (26% salt) into the pipeline at a constant rate. At what rate would the saturated salt solution be added to have 2% salt in the product?
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- A tank contains 1,500 L of water and 20 kg of dissolved salt. Fresh water is enteringthe tank at 15 L/min (the solution stays perfectly mixed), and the solution drains at a rateof 10 L/min. How much salt is in the tank at t minutes and at 10 minutes?A Brine containing 2 lb of salt per gallon runs into a tank at 2 gal/min, brine from this first tank runs into a second tank at 3 gal/min and brine runs out of the second tank at 3 gal/min. Initially, the first tank conditions 10 gal of brine with 30 lb of salt in solution and the second tank 10 gal of fresh water. Assuming uniform consideration in each tank, find the quantity of salt in the second tank at the end of 5 min.Tank A initially holds 100 gallons of brine that contains 150 pounds af salt, and tank B holds 100 gallons of water. Two gallons of water enters tank A each minute, and the mixture , assumed uniform, flows from tank A into tank B at the same rate. If the resulting mixture , also kept uniform , runs out of B at the rate of 2 gallons per minute, how much salt is in the tank B at the end of 1 hour ?
- Liquid alum is used as a coagulant and specific gravity of alum is 1.33. One gallon of alum weights 6.05 kg and contains 3.22 kg of dry alum. Determine;(a)The alumconcentration (b)What is the volume of liquid alum required in order to prepare a solution containing 20,000 mg/l of alum concentration with final volume of 100 mL? (c)The dosage concentration of 1 mL of stock solution in a 2000 mL Gator jarsample.A well stirred tank with a capacity of 500 gal originally contains 200 gal of water with 100lbs of salt in solution. Brine containing 1lb of salt per gallon is pumped into the tank at a rate of 3 gal/min, while fluid is allowed to flow out of the tank at a rate of 2 gal/min. What is the salt concentration at the instant that the tank overflows? What about ten minutes later?What is turbidity, what causes it, how is it treated why it is undesirable in drinking water. Describe processes in water treatment? Calculate the velocity gradient in a rapid mixer (coagulation), where the power input to the propeller is 0.5 kW, the plant provides water for 13000 people with average consumption of 130 L/person/day, retention time in rapid mixer is 23 s and water temperature is 20 oC. The dynamic viscosity at 20oC is 1x10-3 Pa/s. Debate the G value and if out of the range what steps to take bring G in the correct range
- A tank contains 1,500 L of water and 2020 kg of dissolved salt. Fresh water is entering the tank at 15 L/min (the solution stays perfectly mixed), and the solution drains at a rate of 10 L/min. How much salt is in the tank at 10 minutes?Sanitary Engineering laboratory "jar test " Why is alum preferred to other coagulants? What is the difference between coagulation and flocculation? What are coagulant aids? Write the significance of pH in coagulation using alum. Discuss the importance of finding the optimum dosage.Draw a complete process flow diagram for a conventional filtration drinking water treatment plant, labeling each component and indicating its purpose (what it is designed to remove or how it affects removal in subsequent processes). Disinfection by-products: why are they a problem, how are they formed, and how does a conventional filtration plant minimize their formation? The purpose of coagulation and flocculation is to prepare colloidal particles for removal from water or wastewater by a downstream process of settling and/or filtration. The coagulants that are commonly used have two different functions that you should explain. Explain how (the dreaded chemistry) the addition of alum decreases alkalinity and tends to lower the pH of the treated water. (you may want to have a separate slide or graphic to help you explain this). Make sure to discuss how the mixing systems differ between the coagulation (rapid mix) and flocculation (slow mix) steps in the process. Talk about the…
- wet sludge contains 3% solid by weight is pumped to a filter belt press at the rate of 170,000lb/day. the dewatered sludge is 18% by dry weight and the filtrate has total nitrogen concentration of 100 mg/l as nitrogen. assume the belt press has 100% solid capture and specific gravity of the sludge in all forms is 1. Calculate the amount of nitrogen (lb/day) in the filtrate returned? Please explain with details a) 4 b) 9 c) 14 d)19 The answer is one of these optionsA container contains 200 g of solution in which 30 grams of salt are dissolved. Brine containing 1 g of salt/L is then poured into the tank at the rate of 4L / m * i * n and the solution is mixed well and is pumped out of the same rateFind the amount of salt in the container after 5 minutes ?A tank contains 1000L of brine with 15kg of dissolved salt. Pure water enters the tank at a rate of 16L/min. The solution is kept thoroughly mixed and drains from the tank at the same rate. How much salt is in the tank after 20 minutes?