NAME NUMBER 1100 . BIOE341 BIOREACTION ENGINEERING - 90 min GRADE 1. (20 pts) Kadky municipality wishes to construct biological wastewater treatment plant to treat their University Bioengineering Department and will check it a few times each week. The wastewater wastewater. The plant will be maintained by a part-time operator who will come from Marmara from the community has an average flow rate of 1000 m3/day. The influent and effluent substrate concentrations are 500 mg/l and 10 mg/L, respectively. Tests on the wastewater indicate the concentration of biomass (X) is 4000 mg/L and waste sludge (Xw) from the secondary clarifier is meters. The followings are specific parameters you have been asked to calculate. (Yxys = 0.4 gg The design engineer proposes a fully-mixed recycled aeration tank with a volume of 400 cubic 10,000 mg/l. and ka = 0.01 day!) a) What is the sludge age? b) What is the sludge wasting flow rate (m/day)? 2. (20 pts) A microorganism is cultured in a 10 L balch bioreactor, which initially contained 100 g/L colleague that the doubling time for this culture in exponential phase) is very reproducible, with growth substrate (considered to be a "high" concentration) and 0.2 g/L biomass. You are told by a Id = 1.25 hours. After 6 total hours in culture, you measure the cell density and substrate concentration: 1 = 6 h: x = 1.24 g/L; S=73 g/L Fstimate