Table 1.

Plant process stream COD and impurity concentrations.

Process Streams		Liquid Portion					Solid Portion
#	Name	COD (g/L)	Acetalde-hyde (mg/L)	Prop-anol (mg/L)	Meth-anol (mg/L)	Acetal (mg/L)	Acetalde-hyde (mg/L)	Meth-anol (mg/L)	Prop-anol (mg/L)	Acetal (mg/L)
1	Mix Tank Mash	310	<DL	<DL	<DL	<DL	11	<DL	3.6	<DL
2	Liquefaction Tank Mash	290	<DL	<DL	<DL	<DL	360	33	<DL	<DL
3	Ferm Tank Beer	230	130	14	390	<DL	220	860	<DL	2.0
4	Beer Well	280	260	12	170	<DL	160	990	5.0	2.0
5	Column Tops	1200	610	130	380	130	NS	NS	NS	NS
6	Mole Sieve Reject	1200	580	13	1700	10	NS	NS	NS	NS
7	Column Bottoms	120	<DL	<DL	<DL	<DL	<DL	<DL	<DL	3.0
9,10,11	Thin Stillage	150	<DL	<DL	<DL	<DL	<DL	<DL	<DL	1.3
12	Corn Oil/Syrup	52	<DL	10	<DL	<DL	<DL	<DL	<DL	2.7
13	Evaporated Water	5	<DL	<DL	<DL	<DL	NS	NS	NS	NS
15	Well Water	14	<DL	<DL	<DL	<DL	NS	NS	NS	NS
17	CO2 Scrubber Water	40	<DL	<DL	77	<DL	NS	NS	NS	NS
18	Recycled Cook Water	17	<DL	<DL	<DL	<DL	NS	NS	NS	NS
*	Cooling Tower Blow Down	1	<DL	<DL	<DL	<DL	NS	NS	NS	NS
*	Cooling Tower Blow Down + RO Reject	<DL	<DL	<DL	<DL	<DL	NS	NS	NS	NS

NS = no solids in the process stream and <DL = under detection limit. DL is as follows: COD = 1.0 mg/l; acetaldehyde = 7.5 mg/l; propanol = 9 mg/l; methanol = 9 mg/l; and acetal = 5 mg/l.