Operation Parameters	Standard Methods Index	Typical Range	Extreme Range
		Mesophilic	Thermophilic	Mesophilic	Thermophilic
Temperature	2550(A)	32-37 17 °C	50-60 17 °C	20-42 17 °C	45-65 17 °C
Organic Loading Rate	NL	0.8-2.0 17 g VS-L-1-d-1	1.5-5.0 17 g VS-L-1-d-1	0.4-6.4 17 g VS-L-1-d-1	1.0-7.5 17 g VS-L-1-d-1
Hydraulic Retention Time	NL	15 - 35 Days	< 15 ; > 35 Days
Carbon: Nitrogen Ratio	NL	25:1 17	> 25:1
Monitoring Parameters	Standard Methods Index	Optimum Range	Suboptimum Range
pH	4500-H+(B)	6.5 - 8.2 10	< 6.5 ; > 8.2
Alkalinity	2320(B)	1300 - 3000 17 mg CaCO3-L-1	< 1300 mg CaCO3-L-1
Volatile Acids	5560(C)	< 200 10 mg Ac-L-1	> 200 10 mg Ac-L-1
Solids Removal Efficiency	2540(B,E)	> 50 %	< 50 %
Biogas Content	2720(C)	55-70 CH4; 30-45 CO2 %	< 55 CH4; > 45 CO2 %