期刊
WATER ENVIRONMENT RESEARCH
卷 81, 期 7, 页码 702-708出版社
WATER ENVIRONMENT FEDERATION
DOI: 10.2175/106143009X407474
关键词
Suspended air flotation (SAF); dissolved air flotation (DAF); wastewater; algae; Chlorella; Scenedesmus; air:solids (A/S) ratio
资金
- city of Arcata
Current methods to remove algae from a liquid medium are energy intensive and expensive. This study characterized algae contained within a wastewater oxidation pond and sought to identify a more efficient harvesting technique. Analysis of oxidation pond wastewater revealed that algae, consisting primarily of Chlorella and Scenedesmus, composed approximately 80% of the solids inventory during the study period. Results demonstrated that suspended air flotation (SAF) could harvest algae with a lower air: solids (A/S) ratio, lower energy requirements, and higher loading rates compared to dissolved air flotation (DAF) (P < 0.001). Identification of a more efficient algal harvesting system may benefit wastewater treatment plants by enabling cost effective means to reduce solids content of the final effluent. Furthermore, use of SAF to harvest commercially grown Chlorella and Scenedesmus may reduce manufacturing costs of algal-based products such as fuel, fertilizer, and fish food. Water Environ. Res., 81, 702 (2009).
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