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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/wer.1509
|2 doi
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|a pubmed24n1066.xml
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|a (DE-627)NLM319868311
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|a (NLM)33423314
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Li, Baoqiang
|e verfasserin
|4 aut
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| 245 |
1 |
4 |
|a The inhibitory impact of ammonia on thermally hydrolyzed sludge fed anaerobic digestion
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1 |
|c 2021
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 27.08.2021
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|a Date Revised 27.08.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2021 Water Environment Federation.
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|a This study evaluated the impact of ammonia on mesophilic anaerobic digestion (AD) with thermal hydrolysis pretreatment (THP) treating a mixture of primary sludge and waste activated sludge and operated under constant organic loading rate of 9 kg COD/m3 /d. Free ammonia concentrations in the digesters were varied between 37 and 966 mg NH3 -N/L, while maintaining all other operational conditions constant. A decrease in volatile solids reduction from 54 ± 5% (at <554 mg NH3 -N/L) to 35 ± 6% at the maximum free ammonia concentration of 966 mg NH3 -N/L was observed at steady-state conditions. No impact of free ammonia on final dewaterability was detected. Free ammonia thus mostly limited methanogenesis. A free ammonia Monod inhibition constant of 847 ± 222 mg NH3 -N/L for methanogens was estimated based on the digester steady-state methane rates dynamics. This study showed that current THP AD digesters (typically 110-260 mg NH3 -N/L) operate under 12%-18% ammonia inhibition for methanogenesis. Operation under SRT of 15 days, about 2 times more than needed to retain methanogens, can compensate for lower methanogens rates and avoid performance impacts. The later shows a good potential to operate under higher free and total ammonia concentration without jeopardizing performance. PRACTITIONER POINTS: Only from a free ammonia concentration above 554 mg NH3 -N/L, decreased volatile solids reduction and biogas yield were observed. A volatile solids reduction of 35 ± 6% at maximum free ammonia concentration of 966 mg NH3 -N/L was still achieved. A Monod inhibition constant for methanogens of 847 ± 222 mg NH3 -N/L was estimated. It was estimated that current THP AD systems (110-260 mg NH3 -N/L) operate under 12%-18% NH3 inhibition for methanogenesis
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|a Journal Article
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|a AD
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|a NH3
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|a TAN
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|a THP
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|a biosolids
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|a free ammonia
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|a inhibition kinetics
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|a Sewage
|2 NLM
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| 650 |
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|a Ammonia
|2 NLM
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| 650 |
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|a 7664-41-7
|2 NLM
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| 650 |
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|a Methane
|2 NLM
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| 650 |
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7 |
|a OP0UW79H66
|2 NLM
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| 700 |
1 |
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|a Ladipo-Obasa, Mojolaoluwa
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Romero, Adrian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wadhawan, Tanush
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tobin, Michael
|e verfasserin
|4 aut
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| 700 |
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|a Manning, Elizabeth
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Higgins, Matthew
|e verfasserin
|4 aut
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|a Al-Omari, Ahmed
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Murthy, Sudhir
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Novak, John T
|e verfasserin
|4 aut
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|a Riffat, Rumana
|e verfasserin
|4 aut
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| 700 |
1 |
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|a De Clippeleir, Haydée
|e verfasserin
|4 aut
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| 773 |
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8 |
|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 93(2021), 8 vom: 15. Aug., Seite 1263-1275
|w (DE-627)NLM098214292
|x 1554-7531
|7 nnns
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| 773 |
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|g volume:93
|g year:2021
|g number:8
|g day:15
|g month:08
|g pages:1263-1275
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|u http://dx.doi.org/10.1002/wer.1509
|3 Volltext
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|a AR
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|d 93
|j 2021
|e 8
|b 15
|c 08
|h 1263-1275
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