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Continuous stirred tank reactors in series : an approach to enhance the enzymatic hydrolysis and sludge reduction in anaerobic waste activated sludge digestion ?
| Content Provider | Semantic Scholar |
|---|---|
| Author | Guo, Hongxiao Nair, Revathy Tonin, Fabio Hendriks, A. Jan Lier, Jules B. Van Kreuk, Merle De |
| Copyright Year | 2018 |
| Abstract | Hydrolysis is commonly regarded as the rate-limiting step in anaerobic digestion of waste activated sludge (WAS). To enhance the hydrolysis rate, in this study, a novel cascade anaerobic digestion system was developed consisting of small-volume reactors in series, instead of a conventional continuous stirred tank reactor (CSTR). The cascade system achieved a higher reduction in total chemical oxygen demand (TCOD) and increased methane production, applying a solids retention time (SRT) of 22 days. More importantly, a clear acceleration of the hydrolysis rate was found in the cascade system. The measured activities of total protease and cellulase in both systems revealed that the hydrolytic enzymatic reaction rates in each CSTR of the cascade system were generally higher than the activities in the conventional CSTR. Rate acceleration was ascribed to the applied higher organic loading rates in the small-volume CSTRs in series. The results indicate that the developed cascade system indeed is more effective for sludge digestion than the commonly applied conventional CSTR. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.ad16conference.com/programme/assets/uploads/29388-hongxiaoabstractad16-final.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
