Effect of endogenous metabolisms on survival and activities of denitrifying phosphorus removal sludge under various starvation conditions
Copyright © 2020 Elsevier Ltd. All rights reserved..
Denitrifying phosphorus removal sludge are usually faced with various famine environments in wastewater treatment plants (WWTPs). Endogenous metabolisms under aerobic, anoxic, and anaerobic starved conditions were characterized to investigate their impact on survival and activities of denitrifying polyphosphate accumulating organisms (DPAOs). DPAOs utilized intracellular polymers to survive and presented diverse consumed priorities of PHA types under various starvations. The biomass decay rate was approximately 2.7 and 1.7 times lower for aerobic condition than for anoxic and anaerobic conditions owing to the maximum maintenance energy requirement for aerobic condition (68.6 mmol/C-molVSS ATP). During short-term starvations, significant activity decay for anaerobic starved sludge was attributed to its distinctive endogenous metabolisms. For long-term starvations, the higher amounts and preponderant type of PHA (PHB) reserve favored to the greater DPAO activities for anoxic starved sludge. The results show that anoxic condition may be an implementable strategy for maintaining denitrifying phosphorus removal performance in WWTPs.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:315 |
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| Enthalten in: |
Bioresource technology - 315(2020) vom: 16. Nov., Seite 123839 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Sun, Yawen [VerfasserIn] |
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| Links: |
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| Themen: |
27YLU75U4W |
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| Anmerkungen: |
Date Completed 19.08.2020 Date Revised 07.12.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.biortech.2020.123839 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM313067112 |
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| 520 | |a Copyright © 2020 Elsevier Ltd. All rights reserved. | ||
| 520 | |a Denitrifying phosphorus removal sludge are usually faced with various famine environments in wastewater treatment plants (WWTPs). Endogenous metabolisms under aerobic, anoxic, and anaerobic starved conditions were characterized to investigate their impact on survival and activities of denitrifying polyphosphate accumulating organisms (DPAOs). DPAOs utilized intracellular polymers to survive and presented diverse consumed priorities of PHA types under various starvations. The biomass decay rate was approximately 2.7 and 1.7 times lower for aerobic condition than for anoxic and anaerobic conditions owing to the maximum maintenance energy requirement for aerobic condition (68.6 mmol/C-molVSS ATP). During short-term starvations, significant activity decay for anaerobic starved sludge was attributed to its distinctive endogenous metabolisms. For long-term starvations, the higher amounts and preponderant type of PHA (PHB) reserve favored to the greater DPAO activities for anoxic starved sludge. The results show that anoxic condition may be an implementable strategy for maintaining denitrifying phosphorus removal performance in WWTPs | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Activity decay | |
| 650 | 4 | |a Biomass decay | |
| 650 | 4 | |a Denitrifying polyphosphate accumulating organisms (DPAOs) | |
| 650 | 4 | |a Endogenous metabolisms | |
| 650 | 4 | |a Starvation condition | |
| 650 | 7 | |a Sewage |2 NLM | |
| 650 | 7 | |a Waste Water |2 NLM | |
| 650 | 7 | |a Phosphorus |2 NLM | |
| 650 | 7 | |a 27YLU75U4W |2 NLM | |
| 700 | 1 | |a Peng, Yongzhen |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Jianhua |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Xiyao |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Qiong |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Liang |e verfasserin |4 aut | |
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