Impacts of the In-Plant Operational Parameters on Biosolids Odor Quality - Final Results of WERF Odor Project Phase 2 Field and Laboratory Study

Adams, Greg; Hargreaves, Ron; Witherspoon, Jay; Forbes, Bob; McEwen, David; Erdal, Zeynep; Hentz, Larry; Murthy, Sudhir; Card, Tom; Glindemann, Dietmar; Higgins, Matthew

doi:10.2175/193864704784327476

“…This hypothesis was supported by the phase 2 odor study of Water Environmental Research Foundation (Forbes et al, 2004) where it was concluded that greater VS mass was correlated with a higher concentration of MT. Anywhere from 50 to 70 % of VS in biosolids consists of protein (Forbes et al, 2004). Therefore along with solids reduction data, VOSC generation from dewatered biosolids was also quantified.…”

Section: Solids Reduction and Voscsmentioning

confidence: 87%

“…Bioavailable proteins are precursors of VOSC production from dewatered biosolids (Forbes et al, 2004;Higgins et al, 2006 and so greater solids reduction might be expected to result in less sulfur based odor generation. This hypothesis was supported by the phase 2 odor study of Water Environmental Research Foundation (Forbes et al, 2004) where it was concluded that greater VS mass was correlated with a higher concentration of MT.…”

Section: Solids Reduction and Voscsmentioning

confidence: 99%

Digestion Performance of Various Combinations of Thermophilic and Mesophilic Sludge Digestion Systems

Kim

¹

,

Novak²

2010

proc water environ fed

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Various combinations of single and multi-stage anaerobic and aerobic/anaerobic digestion system were studied to evaluate their solids reduction potential along with capabilities to control sulfur based biosolids odor compounds. All the multi-staged digestion systems removed more volatile solids than the single stage anaerobic digestion systems even at the same overall detention time. However, digestion systems with mesophilic digestion as the final stage showed a much lower headspace organic sulfur contents in the dewatered biosolids than the systems with thermophilic digestion as the final stage. This observation leads to the conclusion that placing a mesophilic anaerobic digestion system at the end of multi-stage digestion systems will enable greater sulfur based odor reduction from dewatered biosolids along with greater solid reduction.

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“…This hypothesis was supported by the phase 2 odor study of Water Environmental Research Foundation (Forbes et al, 2004) where it was concluded that greater VS mass was correlated with a higher concentration of MT. Anywhere from 50 to 70 % of VS in biosolids consists of protein (Forbes et al, 2004).…”

Section: Solids Reduction and Voscsmentioning

confidence: 87%

Digestion Performance of Various Combinations of Thermophilic and Mesophilic Sludge Digestion Systems

Kim¹,

Novak²

2010

proc water environ fed

0

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Various combinations of single and multi-stage anaerobic and aerobic/anaerobic digestion system were studied to evaluate their solids reduction potential along with capabilities to control sulfur based biosolids odor compounds. All the multi-staged digestion systems removed more volatile solids than the single stage anaerobic digestion systems even at the same overall detention time. However, digestion systems with mesophilic digestion as the final stage showed a much lower headspace organic sulfur contents in the dewatered biosolids than the systems with thermophilic digestion as the final stage. This observation leads to the conclusion that placing a mesophilic anaerobic digestion system at the end of multi-stage digestion systems will enable greater sulfur based odor reduction from dewatered biosolids along with greater solid reduction.

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“…Odors from sludge biosolids were voted as the top odor problem associated with wastewater treatment at a Water Environment Federation workshop, held in Anaheim, CA (Forbes et al 2004). Because proteins usually comprise 50 to 70% of volatile solids of wastewater sludges (Forbes et al 2004), and sulfur based odors are primarily generated from degradation of these proteins, greater VS removal is expected to result in low odor generation from dewatered sludges.…”

Section: Reduction Of Volatile Organic Sulfur Compound From Dewateredmentioning

confidence: 99%

“…Odors from sludge biosolids were voted as the top odor problem associated with wastewater treatment at a Water Environment Federation workshop, held in Anaheim, CA (Forbes et al 2004). Because proteins usually comprise 50 to 70% of volatile solids of wastewater sludges (Forbes et al 2004), and sulfur based odors are primarily generated from degradation of these proteins, greater VS removal is expected to result in low odor generation from dewatered sludges. In spite of the greater VS reduction by 4TAD, the dewatered sludge from the fourth reactor of the 4TAD system (376.4-260.8 ppmv as S=g VS) produced a much greater peak volatile organic sulfur concentration than the dewatered sludge from the fourth reactor of 4ADT system (29.4-13.2 ppmv as S=g VS) and the single MAD system (4.9-2.5 ppmv as S=g VS).…”

Section: Reduction Of Volatile Organic Sulfur Compound From Dewateredmentioning

confidence: 99%

Multistaged Anaerobic Sludge Digestion Processes

Kim

¹

,

Novak

²

,

Higgins

³

2011

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Two multistaged anaerobic digestion systems, a four-stage thermophilic anaerobic digestion (4TAD), all at 55°C, and a four-stage anaerobic digestion with a tapered temperature configuration (4ADT) at 55, 49, 43, and 37°C, respectively, were studied to evaluate their solids, volatile organic sulfur compounds, and indicator organism (E. coli and fecal coliform) reduction potentials. The 4TAD system removed significantly more volatile solids from sludges than the 4ADT system (6%). However, the dewatered biosolids cakes from the 4ADT system generated fewer organic sulfur compounds than those from the 4TAD system. Both multistage systems showed better digestion efficiencies than single-stage mesophilic or single-stage thermophilic anaerobic digesters at the same overall retention time. However, the lowest organic sulfur compounds were observed from the single mesophilic system. Both multistage anaerobic digestion systems failed to dramatically remove DNA of the indicator organism, E. coli, quantified by real time polymerase chain reaction, even though the indicator organism densities measured by standard culturing methods satisfied EPA Class A biosolids requirements.

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Impacts of the In-Plant Operational Parameters on Biosolids Odor Quality - Final Results of WERF Odor Project Phase 2 Field and Laboratory Study

Cited by 7 publications

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Digestion Performance of Various Combinations of Thermophilic and Mesophilic Sludge Digestion Systems

Digestion Performance of Various Combinations of Thermophilic and Mesophilic Sludge Digestion Systems

Digestion Performance of Various Combinations of Thermophilic and Mesophilic Sludge Digestion Systems

Multistaged Anaerobic Sludge Digestion Processes

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