Establishment and assessment of an integrated citric acid-methane production process
Copyright © 2014 Elsevier Ltd. All rights reserved..
To solve the problem of extraction wastewater in citric acid industrial production, an improved integrated citric acid-methane production process was established in this study. Extraction wastewater was treated by anaerobic digestion and then the anaerobic digestion effluent (ADE) was stripped by air to remove ammonia. Followed by solid-liquid separation to remove metal ion precipitation, the supernatant was recycled for the next batch of citric acid fermentation, thus eliminating wastewater discharge and reducing water consumption. 130U/g glucoamylase was added to medium after inoculation and the recycling process performed for 10 batches. Fermentation time decreased by 20% in recycling and the average citric acid production (2nd-10th) was 145.9±3.4g/L, only 2.5% lower than that with tap water (149.6g/L). The average methane production was 292.3±25.1mL/g CODremoved and stable in operation. Excessive Na(+) concentration in ADE was confirmed to be the major challenge for the proposed process.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2015 |
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| Erschienen: |
2015 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:176 |
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| Enthalten in: |
Bioresource technology - 176(2015) vom: 15. Jan., Seite 121-8 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Xu, Jian [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 06.08.2015 Date Revised 07.12.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.biortech.2014.11.024 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Copyright © 2014 Elsevier Ltd. All rights reserved. | ||
| 520 | |a To solve the problem of extraction wastewater in citric acid industrial production, an improved integrated citric acid-methane production process was established in this study. Extraction wastewater was treated by anaerobic digestion and then the anaerobic digestion effluent (ADE) was stripped by air to remove ammonia. Followed by solid-liquid separation to remove metal ion precipitation, the supernatant was recycled for the next batch of citric acid fermentation, thus eliminating wastewater discharge and reducing water consumption. 130U/g glucoamylase was added to medium after inoculation and the recycling process performed for 10 batches. Fermentation time decreased by 20% in recycling and the average citric acid production (2nd-10th) was 145.9±3.4g/L, only 2.5% lower than that with tap water (149.6g/L). The average methane production was 292.3±25.1mL/g CODremoved and stable in operation. Excessive Na(+) concentration in ADE was confirmed to be the major challenge for the proposed process | ||
| 650 | 4 | |a Evaluation Study | |
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Air stripping | |
| 650 | 4 | |a Anaerobic digestion | |
| 650 | 4 | |a Citric acid | |
| 650 | 4 | |a Glucoamylase | |
| 650 | 4 | |a Sodium | |
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| 700 | 1 | |a Chen, Yang-Qiu |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Hong-Jian |e verfasserin |4 aut | |
| 700 | 1 | |a Bao, Jia-Wei |e verfasserin |4 aut | |
| 700 | 1 | |a Tang, Lei |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Ke |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Jian-Hua |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Xu-Sheng |e verfasserin |4 aut | |
| 700 | 1 | |a Mao, Zhong-Gui |e verfasserin |4 aut | |
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