Effect of transient pH variation on microbial activity and physical characteristics of aerobic granules treating 4-chlorophenol
Chlorophenols are inhibitory compounds that can be biodegraded by aerobic granules in discontinuous processes. Many industrial wastewaters are characterized by transient pH variation over time. These pH changes could affect the overall granule structure and microbial activity during the chlorophenol biodegradation. The objective of this research was to evaluate the effects of transient pH variation on the specific degradation rate (q), granule integrity coefficient (IC), and size in sequencing batch reactors treating 4-chlorophenol (4-CP). First, aerobic granules were acclimated for efficient 4-CP degradation (>99%). The acclimated granules consisted of 55.7% of the phyla Proteobacteria and 40.6% of Bacteroidetes. The main bacteria belong to the order Sphingobacteriales (24%), as well as Amaricoccus, Acidovorax, Shinella, Rhizobium, and Flavobacterium, some of which are new genera reported in acclimated granules degrading 4-CP. Then, pH changes were applied to the acclimated aerobic granules, observing that acid pHs decreased to a greater extent the specific degradation rate (67% to 99%) than basic pHs (34% to 80%). These pH changes caused the granule disaggregation but with lower effects on the IC. The effects of pH change were mainly on the microbial activity more than the physical characteristics of aerobic granules degrading 4-CP.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:55 |
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| Enthalten in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering - 55(2020), 7 vom: 01., Seite 878-885 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Moreno-Andrade, Iván [VerfasserIn] |
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| Links: |
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| Themen: |
3DLC36A01X |
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| Anmerkungen: |
Date Completed 27.07.2020 Date Revised 07.12.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1080/10934529.2020.1751505 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM308603176 |
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| 245 | 1 | 0 | |a Effect of transient pH variation on microbial activity and physical characteristics of aerobic granules treating 4-chlorophenol |
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| 500 | |a Date Revised 07.12.2022 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Chlorophenols are inhibitory compounds that can be biodegraded by aerobic granules in discontinuous processes. Many industrial wastewaters are characterized by transient pH variation over time. These pH changes could affect the overall granule structure and microbial activity during the chlorophenol biodegradation. The objective of this research was to evaluate the effects of transient pH variation on the specific degradation rate (q), granule integrity coefficient (IC), and size in sequencing batch reactors treating 4-chlorophenol (4-CP). First, aerobic granules were acclimated for efficient 4-CP degradation (>99%). The acclimated granules consisted of 55.7% of the phyla Proteobacteria and 40.6% of Bacteroidetes. The main bacteria belong to the order Sphingobacteriales (24%), as well as Amaricoccus, Acidovorax, Shinella, Rhizobium, and Flavobacterium, some of which are new genera reported in acclimated granules degrading 4-CP. Then, pH changes were applied to the acclimated aerobic granules, observing that acid pHs decreased to a greater extent the specific degradation rate (67% to 99%) than basic pHs (34% to 80%). These pH changes caused the granule disaggregation but with lower effects on the IC. The effects of pH change were mainly on the microbial activity more than the physical characteristics of aerobic granules degrading 4-CP | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a 4-chlorophenol | |
| 650 | 4 | |a SBR | |
| 650 | 4 | |a aerobic granules | |
| 650 | 4 | |a integrity coefficient | |
| 650 | 4 | |a pH | |
| 650 | 7 | |a Chlorophenols |2 NLM | |
| 650 | 7 | |a Sewage |2 NLM | |
| 650 | 7 | |a Waste Water |2 NLM | |
| 650 | 7 | |a Water Pollutants, Chemical |2 NLM | |
| 650 | 7 | |a 4-chlorophenol |2 NLM | |
| 650 | 7 | |a 3DLC36A01X |2 NLM | |
| 700 | 1 | |a Valdez-Vazquez, Idania |e verfasserin |4 aut | |
| 700 | 1 | |a López-Rodríguez, Antonio |e verfasserin |4 aut | |
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| 773 | 1 | 8 | |g volume:55 |g year:2020 |g number:7 |g day:01 |g pages:878-885 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1080/10934529.2020.1751505 |3 Volltext |
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