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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ibrahim, Victor Hey, Tobias Jönsson, Karin |
| Description | Author Affiliation: Ibrahim V ( VA SYD, SE-201 21 Malmö, Sweden. Electronic address: victor.ibrahim@vasyd.se.); Hey T ( VA SYD, SE-201 21 Malmö, Sweden); Jönsson K ( Water and Environmental Engineering, Department of Chemical Engineering, Lund University, SE-211 00 Lund, Sweden.) |
| Abstract | In anaerobic digestion, the production of short-chain fatty acids (SCFAs) can be beneficial or harmful to the overall process, depending on the concentration of accumulated acids. Therefore, the accurate determination of the SCFA concentration in both fresh and stored sludge hydrolysates is important. To select a suitable method for monitoring SCFAs during the anaerobic digestion of sewage sludge, the accuracy of three available analytical methods, including 5 pH point acid titration (TITRA5), gas chromatography (GC), and spectrophotometry, were compared in the present study. The results revealed that TITRA5 and GC displayed better agreement in the achieved measurements and higher precision and accuracy than the spectrophotometric assay, as supported by the application of different statistical models. TITRA5 excelled in titrating unfiltered hydrolysate while simultaneously measuring the alkalinity, whereas the GC method provided detailed information on the contribution of different fatty acids to the total acidity. In contrast, the spectrophotometric assay suffered from many forms of interference, depending on the sample's matrix. SCFA production followed the pattern of enzymatic reactions and fitted the Michaelis-Menten model. In addition to promoting TITRA5 as an accurate and robust analytical tool for routine SCFA analyses, this comparative study also demonstrated the possibility of storing hydrolysate samples at different temperatures and durations without altering the SCFA measurements. |
| File Format | HTM / HTML |
| ISSN | 10010742 |
| Issue Number | 4 |
| Journal | Journal of Environmental Sciences |
| Volume Number | 26 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-04-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Health Fatty Acids Analysis Sewage Anaerobiosis Hydrolysis Pilot Projects Comparative Study Evaluation Studies Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Medicine Environmental Engineering |
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