文献类型：期刊文献

英文题名：Effect of exogenous CO2on algae growth and wastewater treatment under simulated natural light/dark cycle using municipal wastewater as feedstock

作者：Ruan, Megan[1]; Li, Yecong[1]; Cheng, Yanling[1,2]

第一作者：Ruan, Megan

通讯作者：Cheng, Y.

机构：[1] Center for Biorefining, Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Avenue, St. Paul, MN 55108, United States; [2] Biochemical Engineering College, Beijing Union University, Beijing 100023, China

第一机构：Center for Biorefining, Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Avenue, St. Paul, MN 55108, United States

通讯机构：[1]Center for Biorefining, Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Avenue, St. Paul, MN 55108, United States

年份：2012

卷号：21

期号：3-4

起止页码：1-8

外文期刊名：International Agricultural Engineering Journal

收录：EI(收录号：20131616218852);Scopus(收录号：2-s2.0-84876138569)

语种：英文

外文关键词：Algae - Batch reactors - Biomass - Carbon dioxide - Ecology - Feedstocks - Nutrients

摘要：This study investigated the effect of exogenous CO2 on algae biomass accumulation and wastewater nutrient removal under different light intensities and a simulated natural light/dark cycle for algae strain Chlorella kessleri, using highly concentrated municipal wastewater (centrate) as feedstock. The results showed that Chlorella kessleri could easily adapt to centrate wastewater in batch reactors under simulated natural light/dark cycles with CO2 injections under all tested light intensities. Both CO 2 concentration and light intensity had a significant effect on algae growth and nutrient removal from wastewater. The study confirmed that there was an optimum CO2 level for algae growth, which was 2.5% for this investigation. When the light intensity reached a certain lower limit, the effect of CO2 supplementation became minimum because the photoautotrophic efficiency was significantly reduced. It is also found that the application of continuous or fed-batch cultivation system was preferred over batch cultivation process due to the fact that the nutrients was depleted and the algae biomass concentration decreased on Day 8.