BULK VOLUME FERMENTERS: CASE STUDIES
|
|
|
|
|
ANAEROBIC PRETREATMENT OPTIONS - self-assessment |
|
|
|
|
|
LOW-RATE ANAEROBIC - EARTHEN BASIN OR CONCRETE W/FLOATING COVER & GAS RECOVERY TYPE |
|
|
|
| flow |
1680 |
m3/day |
0.444 |
mgd |
18487 |
lbCOD/day |
|
|
|
|
3/20/2026 |
|
|
| COD |
5000 |
mg/L |
|
|
8400 |
kgCOD/day |
Reactor Temperature |
32.0 |
°C |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| load rate |
0.6375 |
kgCOD/day per m3 |
|
reactor V= |
13176 |
m3 |
465320 |
cu.ft. |
|
|
|
|
|
|
40 |
lbCOD/day per 1,000 cu.ft. |
detention= |
7.84 |
days |
188.2 |
hours |
|
|
|
|
|
| height |
6.7 |
m (tentative) |
|
earthen basin w/floating cover |
|
|
|
|
|
|
|
| (or depth) |
|
|
|
|
|
|
|
|
|
|
|
140 |
m3/h |
pump |
|
|
|
|
recycle = |
1.00 |
xQ |
|
area = |
1967 |
m2 |
total flow |
3360 |
m3/day |
|
|
|
|
|
(arb.) |
1680 |
m3/day |
|
W = |
31 |
m |
|
616 |
U.S. GPM |
|
|
|
|
|
|
|
|
L = 2 * W |
63 |
m |
21161 |
sq.ft. |
136 |
orifices |
|
|
|
|
|
|
|
|
Cover(est.) |
1967 |
m2 |
21161 |
sq.ft. |
4.5 |
laterals |
| biogas production, say at |
85 |
% conversion |
|
|
Liner (est.) |
4488 |
m2 |
48289 |
sq.ft. |
|
|
|
|
|
7140 |
kgCOD/day converted |
|
|
|
|
600 |
btu per cu.ft. |
|
|
|
|
2570 |
m3 methane at 0.36 m3 methane per kgCOD converted |
|
|
|
|
|
|
|
|
3856 |
m3 biogas at 2/3 methane content |
|
|
btu/h |
electrical power (32%) |
|
|
|
|
161 |
m3/hour biogas |
|
95 |
CFM biogas |
3403965 |
319 |
kW |
428 |
HP |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Compare! |
98 |
% conversion |
|
109 |
CFM biogas |
3924571 |
368 |
kW |
493 |
HP |
| notes: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
floating membrane for cover, per m2 |
|
|
|
|
verification as 140 kW per 10^3 kgCOD/day converted |
|
|
gas handling system/burner/boiler/turbine |
|
|
|
|
|
|
32% as electricity |
|
|
|
PVC piping for inlet/distribution |
|
|
|
|
|
7 |
140 |
320 |
kW |
|
|
|
pump/redundant pump/ mixer + backup mixer |
|
|
|
|
|
|
|
|
|
|
baffle |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
methane could be only 55% -> |
4673 |
m3 biogas |
|
|
|
|
|
|
|
|
|
|
|
|
195 |
m3/hour biogas blower/exhaust |
|
|
|
|
|
|
|
Preheating requirements |
|
|
|
|
|
|
|
|
|
|
|
|
|
l/h |
|
°C |
°C |
|
Q kcal/h |
btu/h |
kW |
HP |
|
|
|
|
|
|
70000 |
|
7 |
32.0 |
|
1750000 |
6944000 |
2035 |
2726 |
|
|
|
|
|
|
70000 |
|
15 |
32.0 |
|
1190000 |
4721920 |
1384 |
1854 |
|
|
|
|
|
|
70000 |
|
20 |
32.0 |
|
840000 |
3333120 |
977 |
1309 |
|
|
|
|
|
|
70000 |
|
25 |
32.0 |
|
490000 |
1944320 |
570 |
763 |
|
|
|
|
|
|
70000 |
|
28 |
32.0 |
|
280000 |
1111040 |
326 |
436 |
|
|
|
|
Feel free to play with numbers (Enter your numbers but check your Yo's and Kd's as well!)
https://engineeringfundamentals.com/jcy.html
In order to obtain more information and/or request courtesy capacity plannings or case assessments, please send an e-mail to Martin Balestie <answers@engineeringfundamentals.com> and/or/cc Martin Balestie <balestie@umich.edu>. It is recommended to include a brief initial description of the case, ideally no more than one page, or project in progress / under study. The possibility of receiving and handling individual technical consultations has been foreseen but are limited as per availability. Alternatively make contact via sms/telephone +1 917 300 3024.