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DEWATERING OF A BIOLOGICAL SLUDGE FROM A PAPER MILL WASTEWATER TREATMENT PLANT Roger O. Dickey, Project Engineer Roger C. Ward, Project Manager Howard, Needles, Tammen & Bergendoff Indianapolis, Indiana 46268 The high disposal cost of aerobically digested waste activated sludge from a paper mill (Container Corporation of America) secondary wastewater treatment plant prompted a search for a less costly sludge disposal system. Candidate sludge thickening and dewatering systems were identified, screened, and evaluated. Bench and pilot scale tests were performed as an integral part of the cost evaluation and final system design. A belt press sludge dewatering system was constructed, and its full-scale performance has been documented. The paper mill secondary wastewater treatment plant in Wabash, IN, consists of an activated sludge process which treats paper mill primary effluent and municipal primary effluent from an adjacent municipal wastewater treatment plant. The municipal wastewater is added for cooling and nutritive purposes. Figure 1 is a schematic of the paper mill secondary wastewater treatment plant and the municipal wastewater treatment plant. Table I lists the typical wastewater treatment plant influent characteristics. The paper mill primary sludge is recycled to the paper making process for recovery of paper fiber. The municipal primary and waste activated sludges are anaerobically digested. The secondary wastewater treatment plant generates between 1600 and 2300 pounds per day (dry solids basis) of aerobically digested waste activated sludge. This sludge gravity thickens to only 1.0 to 1.5% solids, producing a large and costly volume of liquid sludge for disposal on land application sites. Mechanical thickening or dewatering was deemed necessary to reduce the volume of sludge for ultimate disposal to a manageable and less costly amount. The approach taken for selection of the best sludge thickening and/or dewatering system consisted of three phases: (1) preliminary screening of candidate systems; (2) economic ...■■ CAA.I.H. ■AAA I ARR1ICATICN IIMIiC ■I1IITT •nt»«i • »•»•«• tmcilll- IHJI —U ABA...C.....Te.A Figure 1. Schematic of wastewater treatment plant. 356
Object Description
Purdue Identification Number | ETRIWC198137 |
Title | Dewatering of a biological sludge from a paper mill wastewater treatment plant |
Author |
Dickey, Roger O. Ward, Roger C. |
Date of Original | 1981 |
Conference Title | Proceedings of the 36th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,32118 |
Extent of Original | p. 356-362 |
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 | 2009-07-07 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 356 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | DEWATERING OF A BIOLOGICAL SLUDGE FROM A PAPER MILL WASTEWATER TREATMENT PLANT Roger O. Dickey, Project Engineer Roger C. Ward, Project Manager Howard, Needles, Tammen & Bergendoff Indianapolis, Indiana 46268 The high disposal cost of aerobically digested waste activated sludge from a paper mill (Container Corporation of America) secondary wastewater treatment plant prompted a search for a less costly sludge disposal system. Candidate sludge thickening and dewatering systems were identified, screened, and evaluated. Bench and pilot scale tests were performed as an integral part of the cost evaluation and final system design. A belt press sludge dewatering system was constructed, and its full-scale performance has been documented. The paper mill secondary wastewater treatment plant in Wabash, IN, consists of an activated sludge process which treats paper mill primary effluent and municipal primary effluent from an adjacent municipal wastewater treatment plant. The municipal wastewater is added for cooling and nutritive purposes. Figure 1 is a schematic of the paper mill secondary wastewater treatment plant and the municipal wastewater treatment plant. Table I lists the typical wastewater treatment plant influent characteristics. The paper mill primary sludge is recycled to the paper making process for recovery of paper fiber. The municipal primary and waste activated sludges are anaerobically digested. The secondary wastewater treatment plant generates between 1600 and 2300 pounds per day (dry solids basis) of aerobically digested waste activated sludge. This sludge gravity thickens to only 1.0 to 1.5% solids, producing a large and costly volume of liquid sludge for disposal on land application sites. Mechanical thickening or dewatering was deemed necessary to reduce the volume of sludge for ultimate disposal to a manageable and less costly amount. The approach taken for selection of the best sludge thickening and/or dewatering system consisted of three phases: (1) preliminary screening of candidate systems; (2) economic ...■■ CAA.I.H. ■AAA I ARR1ICATICN IIMIiC ■I1IITT •nt»«i • »•»•«• tmcilll- IHJI —U ABA...C.....Te.A Figure 1. Schematic of wastewater treatment plant. 356 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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