1. A continuous stirred tank reactor (CSTR) receives two different feedstocks (1) and (2), the feed flow rates and the main characteristics of the two feedstocks are shown in the table below. Assuming that the SRT is 15 days, the COD removal efficiency is 50%, the methane content in the biogas is 40%, and the reactor temperature is 37oC.

	Feedstock (1)	Feedstock (2)
Flow (m3/d)	100	10
TCOD (kg/m3)	60	120
TS (kg/m3)	10	60

Calculate the following:

1. Reactor volume
2. Organic loading rate (kg TCOD/m3 .d)
3. Solids loading rate (kg TS/m3 .d)
4. Methane production rate (m3 /d)
5. Biogas production rate (m3 /d)
6. Methane yield (m3 CH4/kgTSadded)