page 348 |
Previous | 1 of 10 | Next |
|
|
Loading content ...
Treatability of Wastewater from Soluble Coffee
Manufacturing
MARK J. HAMMER, Professor
University of Nebraska
Lincoln, Nebraska
GEORGE F. BERRY, Engineer
Bert Gurney and Associates, Inc.
Omaha, Nebraska
RONALD F. CALTA, Major
United States Marine Corps
Lincoln, Nebraska
DONALD R. KREBS, Engineer
Henningson, Durham and Richardson
Omaha, Nebraska
INTRODUCTION
A sewage plant treating municipal wastewater jointly with wastes from an
instant coffee manufacturing plant encountered operational difficulties resulting
from bulking activated sludge. Poor settling resulted in carryover of biological floe in
the final effluent and production of a large volume of waste activated sludge. The
treatment plant was an activated sludge system without primary sedimentation using
aerobic digesters for waste sludge treatment. The aeration basins were short
rectangular tanks equipped with fine bubble diffusers, and the final clarifiers were
rectangular with settled sludge scraped to a hopper at the effluent end of the tank.
Design loads of the treatment plant were 1.5 mgd and 2550 lb BOD/day
(aeration tank loading = 32 lb BOD/1000 cu ft/day, aeration time = 9.6 hr, clarifier
overflow rate = 600 gpd/sq ft, and settling time = 3.0 hr). Existing loads were 1.8
mgd and 2700 lb BOD/day (aeration tank loading = 34 lb BOD/1000 cu ft/day,
aeration time = 8.0 hr, clarifier overflow rate = 720 gpd/sq ft, and settling time = 2.5
hr). The operating food to microorganism ratio (F/M) was about 0.3 lb BOD applied
per lb mixed liquor suspended solids (MLSS) in the aeration tank. Approximately 70
percent of the BOD and 11 percent of the flow were from coffee wastewater. Since
the existing loads were not significantly greater than design, the bulking problem
could not be attributed to overload alone.
The purpose of this study was to determine the separate and joint treatability
characteristics of soluble coffee manufacturing wastewater. A review of literature
revealed that Chambers (1) found fungal growths were a major problem in activated
sludge treatment of coffee wastes and that the process was susceptible to interference
from shock loads which caused sludge bulking.
348
Object Description
| Purdue Identification Number | ETRIWC197130 |
| Title | Treatability of wastewater from soluble coffee manufacturing |
| Author |
Hammer, Mark J. Berry, George F. Calta, Ronald F. Krebs, Donald R. |
| Date of Original | 1971 |
| Conference Title | Proceedings of the 26th Industrial Waste Conference |
| Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,19214 |
| Extent of Original | p. 348-357 |
| Series | Engineering extension series no. 140 |
| Collection Title | Engineering Technical Reports Collection, Purdue University |
| Repository | Purdue University Libraries |
| Rights Statement | Digital object copyright Purdue University. All rights reserved. |
| Language | eng |
| Type (DCMI) | text |
| Format | JP2 |
| Date Digitized | 2009-06-25 |
| Capture Device | Fujitsu fi-5650C |
| Capture Details | ScandAll 21 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
Description
| Title | page 348 |
| Collection Title | Engineering Technical Reports Collection, Purdue University |
| Repository | Purdue University Libraries |
| Rights Statement | Digital object copyright Purdue University. All rights reserved. |
| Language | eng |
| Type (DCMI) | text |
| Format | JP2 |
| Capture Device | Fujitsu fi-5650C |
| Capture Details | ScandAll 21 |
| Transcript | Treatability of Wastewater from Soluble Coffee Manufacturing MARK J. HAMMER, Professor University of Nebraska Lincoln, Nebraska GEORGE F. BERRY, Engineer Bert Gurney and Associates, Inc. Omaha, Nebraska RONALD F. CALTA, Major United States Marine Corps Lincoln, Nebraska DONALD R. KREBS, Engineer Henningson, Durham and Richardson Omaha, Nebraska INTRODUCTION A sewage plant treating municipal wastewater jointly with wastes from an instant coffee manufacturing plant encountered operational difficulties resulting from bulking activated sludge. Poor settling resulted in carryover of biological floe in the final effluent and production of a large volume of waste activated sludge. The treatment plant was an activated sludge system without primary sedimentation using aerobic digesters for waste sludge treatment. The aeration basins were short rectangular tanks equipped with fine bubble diffusers, and the final clarifiers were rectangular with settled sludge scraped to a hopper at the effluent end of the tank. Design loads of the treatment plant were 1.5 mgd and 2550 lb BOD/day (aeration tank loading = 32 lb BOD/1000 cu ft/day, aeration time = 9.6 hr, clarifier overflow rate = 600 gpd/sq ft, and settling time = 3.0 hr). Existing loads were 1.8 mgd and 2700 lb BOD/day (aeration tank loading = 34 lb BOD/1000 cu ft/day, aeration time = 8.0 hr, clarifier overflow rate = 720 gpd/sq ft, and settling time = 2.5 hr). The operating food to microorganism ratio (F/M) was about 0.3 lb BOD applied per lb mixed liquor suspended solids (MLSS) in the aeration tank. Approximately 70 percent of the BOD and 11 percent of the flow were from coffee wastewater. Since the existing loads were not significantly greater than design, the bulking problem could not be attributed to overload alone. The purpose of this study was to determine the separate and joint treatability characteristics of soluble coffee manufacturing wastewater. A review of literature revealed that Chambers (1) found fungal growths were a major problem in activated sludge treatment of coffee wastes and that the process was susceptible to interference from shock loads which caused sludge bulking. 348 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
Tags
Comments
Post a Comment for page 348
