Investigation of anaerobic digestion of Chlorella sp and Micractinium sp grown in high-nitrogen wastewater and their co-digestion with waste activated sludge

被引：70

作者：

Wang, Meng ^{[1
]}

Park, Chul ^{[1
]}

机构：

[1] Univ Massachusetts, Dept Civil & Environm Engn, Amherst, MA 01003 USA

来源：

BIOMASS & BIOENERGY | 2015年 / 80卷

关键词：

Microalgae; Waste activated sludge; Extracellular polymeric substances; Anaerobic digestion; CH4; yield; MICROALGAE GROWTH; NUTRIENT REMOVAL; EXTRACTION; BIODIESEL; RECOVERY; POLYMERS; POULTRY; BIOMASS; IMPACT; RATIO;

D O I：

10.1016/j.biombioe.2015.04.028

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study investigated two wildtype green algae, Micractinium sp. and Chlorella sp., for their growth in high nitrogen wastewater (mixture of sludge centrate and primary effluent wastewater) and subsequent anaerobic digestion under mesophilic conditions. Extraction and analysis of extracellular polymeric substances (EPS) in both algal species during cultivation showed that Micractinium generated larger quantity of EPS-proteins than Chlorella. Anaerobic digestion of harvested algae showed the opposite trend that Chlorella allowed a higher CH4 yield on the volatile solids fed the digester (VSfed) of 230 dm(3) kg(-1) than Micractinium (209 dm(3) kg(-1)). These results suggested that different growth patterns of two types of algae, with different quantity of EPS expressed, affected anaerobic digestibility and biogas yield. Co-digestion of algae with waste activated sludge (WAS) improved the volatile solids reduction, hydrolysis efficiency as well as the biogas yields of algae. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：30 / 37

页数：8

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