Enhanced anaerobic digestion of waste-activated sludge by thermal-alkali pretreatment : a pilot-scale study

© 2024 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY-NC-ND 4.0), which permits copying and redistribution for non-commercial purposes with no derivatives, provided the original work is properly cited (http://creativecommons....

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Veröffentlicht in:Water science and technology : a journal of the International Association on Water Pollution Research. - 1986. - 90(2024), 1 vom: 15. Juli, Seite 303-313
1. Verfasser: Li, Biqing (VerfasserIn)
Weitere Verfasser: Tang, Yao, Xiao, Xiannian, Tang, Xia, Luo, Dan, Liu, Yuxin, Zhang, Yahui, Zhang, Liguo
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Water science and technology : a journal of the International Association on Water Pollution Research
Schlagworte:Journal Article alkali hydrolysis anaerobic digestion (AD) pretreatment thermal waste-activated sludge (WAS) Sewage Alkalies Methane OP0UW79H66 mehr... Sodium Hydroxide 55X04QC32I
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520 |a © 2024 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY-NC-ND 4.0), which permits copying and redistribution for non-commercial purposes with no derivatives, provided the original work is properly cited (http://creativecommons.org/licenses/by-nc-nd/4.0/). 
520 |a The composition of waste-activated sludge (WAS) is complex, containing a large amount of harmful substances, which pose a threat to the environment and human health. The reduction and resource utilization of sludge has become a development demand in sludge treatment and disposal. Based on the technical bottlenecks in the practical application of direct anaerobic digestion technology, this study adopted two different thermal and thermal-alkali hydrolysis technologies to pretreat sludge. A pilot-scale experiment was conducted to investigate the experimental conditions, parameters, and effects of two hydrolysis technologies. This study showed that the optimal hydrolysis temperature was 70 °C, the hydrolysis effect and pH can reach equilibrium with the hydrolysis retention time was 4-8 h, and the optimal alkali concentration range was 0.0125-0.015 kg NaOH/kg dry-sludge. Thermal-alkali combination treatment greatly improved the performance of methane production, the addition of NaOH increased methane yield by 31.2% than that of 70 °C thermal hydrolysis. The average energy consumption is 75 kWh/m3 80% water-content sludge during the experiment. This study provides a better pretreatment strategy for exploring efficient anaerobic digestion treatment technologies suitable for southern characteristic sewage sludge 
650 4 |a Journal Article 
650 4 |a alkali hydrolysis 
650 4 |a anaerobic digestion (AD) 
650 4 |a pretreatment 
650 4 |a thermal 
650 4 |a waste-activated sludge (WAS) 
650 7 |a Sewage  |2 NLM 
650 7 |a Alkalies  |2 NLM 
650 7 |a Methane  |2 NLM 
650 7 |a OP0UW79H66  |2 NLM 
650 7 |a Sodium Hydroxide  |2 NLM 
650 7 |a 55X04QC32I  |2 NLM 
700 1 |a Tang, Yao  |e verfasserin  |4 aut 
700 1 |a Xiao, Xiannian  |e verfasserin  |4 aut 
700 1 |a Tang, Xia  |e verfasserin  |4 aut 
700 1 |a Luo, Dan  |e verfasserin  |4 aut 
700 1 |a Liu, Yuxin  |e verfasserin  |4 aut 
700 1 |a Zhang, Yahui  |e verfasserin  |4 aut 
700 1 |a Zhang, Liguo  |e verfasserin  |4 aut 
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773 1 8 |g volume:90  |g year:2024  |g number:1  |g day:15  |g month:07  |g pages:303-313 
856 4 0 |u http://dx.doi.org/10.2166/wst.2024.210  |3 Volltext 
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