1- You have been asked to design a treatment system to treat by methane fermentation a wastewater with flow rate of 10,000 m3/d and containing only soluble components including 4,000 mg/L BOD. The wastewater consists primarily of proteinaceous materials. One treatment system being considered is a CSTR with settling and recycles.

(a) Make appropriate assumptions and calculations to determine a suitable

reactor volume (m3) for this treatment system using a safety factor that is in the conventional range.

(b) Estimate the sludge production rate from this treatment system.

(c) Estimate the methane production from this system in m3/d at standard

temperature (0 C) and pressure (1 atm).

Be sure to indicate all assumptions made and give a reason for using the values chosen.