XUYu-meng,LUJin-suo.Effect of Cation Exchange Resin Coupled with Lysozyme on SCFAs Production by Residual Sludge Anaerobic Fermentation[J].China Water & Wastewater,2024,40(5):23-28.
Effect of Cation Exchange Resin Coupled with Lysozyme on SCFAs Production by Residual Sludge Anaerobic Fermentation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第5期
Page:
23-28
Column:
Date of publication:
2024-03-01
- Keywords:
- residual sludge; anaerobic fermentation; cation exchange resin; lysozyme; short-chain fatty acids
- Abstract:
- Slow hydrolysis efficiency limits the recovery of short-chain fatty acids (SCFAs) by residual sludge anaerobic fermentation. Individual pretreatment method usually presents single pattern of organic matter release, resulting in limited sludge hydrolysis efficiency. In this study, cation exchange resin-coupled lysozyme was used to synergistically promote the residual sludge hydrolysis and thus the SCFAs recovery through single resin, lysozyme and resin+lysozyme coupled experiments. The results showed that the SCOD production increased to 5 824.16 mg/L after 1-day resin+lysozyme treatment, whereas the control, individual resin and individual lysozyme treatments only reached 882.13-3 493.52 mg/L. The resin-coupled lysozyme treatment significantly promoted the solubilization of soluble organic matter and improved its biodegradability. This excellent solubilization of organic matter provided abundant substrate for subsequent biotransformation, achieving SCFAs accumulation of 3 715.23 mg/L, which was 7.26 times, 2.41 times and 1.75 times higher than that of the control, resin and lysozyme tests, respectively. Meanwhile, the dewatering capacity of the fermented sludge was not much different from the control test after chemical conditioning, and the recovered SCFAs could be used as an alternative carbon source in the project.
Last Update:
2024-03-01