A Victorian agricultural company requires 5,000 tonne per month of irrigation water to run their farm. The company has access to brackish water from a local river with a salt concentration of 2 kg/tonne. The owner of the company tasked you to design a double stage reverse osmosis system to meet the water need. The maximum legal salt concentration in irrigation water is 0.5 kg/tonne. Each RO unit has a %Rejection of 95% and a %recovery of 25%. a) You decide to operate both RO systems in parallel and each produces 2500 tonne per month. Calculate mfeed1, mfeed2, mbrine1, mbrine2 as well as Xtotal and Xbrine1 6 points; (use configuration 1) b) You now decide to operate both RO systems in series. The first one produces 2500 tonne and its brine serves as the feed for the second Ro system. Calculate mfeed2 mpermeate2, mbrine2, as well as Xpermeate2, Xtotal of the combined permeate and mtotal. (Note, the combined permeate does not meet the 5000 tonne required) 12 points (use configuration 2) c) You install a bypass where you mix untreated brackish water to make up the shortfall. Calculate how much brackish water needs to be added (mbypass). Determine whether the salt concentration Xtotal is below the legal limit (yes or no). 2points (use configuration 3) Please refer to the next page for the box flow diagrams. Please include your calculations in your submission. Configuration 1 m Feed1 XFeed1 m Feed1 XFeed1 RO purification 1 Configuration 2 mBrine1 XBrine1 mFeed1 XFeed1 mpermeate1 Xpermeate1 RO purification 1 Configuration 3 mBrine1 XBrine1 RO purification 1 mBrine1 XBrine1 mFeed2 XFeed2 Mixer m Total XTotal m Bypass mpermeate1 Xpermeate1 RO purification 2 mBrine2 XBrine2 mpermeate1 Xpermeate1 RO purification 2 mBrine2 XBrine2 RO purification 2 mpermeate2 Xpermeate2 mBrine2 XBrine2 mpermeate2 Xpermeate2 mpermeate2 Xpermeate2 Mixer Mixer m Total XTotal mTotal XTotal