Optimizing vermifilter depth by process performance collaborated with the evolutions of microbial characteristics during sewage sludge treatment
The present study focuses on optimizing filter depth on sludge reduction in a four-stage vermifiltration during the course of treating excess sludge continuously. The results indicated that when the filter depth exceeded 75 cm, though the fourth stage can further advance the sludge reduction, its contribution for the total sludge reduction was lower than 10%, while the aerobic bacteria, especially the dominant bacteria (Proteobacteria and Bacteroidetes), kept a high similarity as the filter depth varied. Furthermore, earthworm activities attributed to aerobic bacteria being preferentially selected in the system, positively supporting the organic decomposition. As far as economic cost and process performance are concerned, a 75-cm vermifilter was recommended to efficiently and economically achieve the required standard for sewage sludge reduction and stabilization.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2017 |
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| Erschienen: |
2017 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:24 |
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| Enthalten in: |
Environmental science and pollution research international - 24(2017), 7 vom: 04. März, Seite 6688-6697 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Yang, Gege [VerfasserIn] |
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| Links: |
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| Themen: |
Filter depth |
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| Anmerkungen: |
Date Completed 22.05.2017 Date Revised 02.12.2018 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1007/s11356-016-8086-y |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM267971524 |
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| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The present study focuses on optimizing filter depth on sludge reduction in a four-stage vermifiltration during the course of treating excess sludge continuously. The results indicated that when the filter depth exceeded 75 cm, though the fourth stage can further advance the sludge reduction, its contribution for the total sludge reduction was lower than 10%, while the aerobic bacteria, especially the dominant bacteria (Proteobacteria and Bacteroidetes), kept a high similarity as the filter depth varied. Furthermore, earthworm activities attributed to aerobic bacteria being preferentially selected in the system, positively supporting the organic decomposition. As far as economic cost and process performance are concerned, a 75-cm vermifilter was recommended to efficiently and economically achieve the required standard for sewage sludge reduction and stabilization | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Filter depth | |
| 650 | 4 | |a Microbial community structure | |
| 650 | 4 | |a Microbial diversity | |
| 650 | 4 | |a Microbial respiration | |
| 650 | 4 | |a Sludge reduction | |
| 650 | 7 | |a Sewage |2 NLM | |
| 700 | 1 | |a Xing, Meiyan |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Jing |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Jian |e verfasserin |4 aut | |
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