Algaculture integration in conventional wastewater treatment plants: Anaerobic digestion comparison of primary and secondary sludge with microalgae biomass

被引：83

作者：

Mahdy, Ahmed ^{[1
,2
]}

Mendez, Lara ^{[1
]}

Ballesteros, Mercedes ^{[1
,3
]}

Gonzalez-Fernandez, Cristina ^{[1
]}

机构：

[1] IMDEA Energy, Madrid 28935, Spain

[2] Zagazig Univ, Fac Agr, Dept Agr Microbiol, Zagazig 44511, Egypt

[3] CIEMAT, E-28040 Madrid, Spain

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 184卷

关键词：

Secondary/activated sludge; Primary sludge; Microalgae; Codigestion; Methane; SCENEDESMUS SP BIOMASS; CHLORELLA-VULGARIS; METHANE PRODUCTION; ACTIVATED-SLUDGE; CO-DIGESTION; DEGRADATION; TEMPERATURE; HYDROLYSIS; PONDS; PRETREATMENT;

D O I：

10.1016/j.biortech.2014.09.145

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study evaluated the feasibility of using microalgae biomass as feedstock for anaerobic digestion together with other biomasses (primary and secondary sludge) normally generated in WWTP. Raw microalgae biomass anaerobic biodegradability (33%) was higher than that of secondary sludge (23%). Thermal pretreatment enhanced 62% and 16% methane yield for Chlorella vulgaris and secondary sludge, respectively. When both substrates were codigested, methane yields remained low. On the other hand, primary sludge supported the highest anaerobic biodegradability (97%) and when combined with thermally pretreated C. vulgaris, methane yields were higher (13-17%) than the ones expected theoretically. Despite the high protein content of those substrates and the high nitrogen mineralization, no ammonia inhibition was detected. Thereby, this study showed that algae biomass is a potential cosubstrate for biogas production together with municipal wastewater sludge. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：236 / 244

页数：9

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