期刊
BIORESOURCE TECHNOLOGY
卷 143, 期 -, 页码 499-504出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.06.044
关键词
Wastewater treatment; High salinity; Microalgal cultivation; Biomass; Lipid content
In this work, the acclimation of Chlorella pyrenoidosa in diluted wastewater was studied to produce biomass and remove chemical oxygen demand (COD), ammonia-N and phosphorous. The results indicated that the optimal conditions (the volume ratio of wastewater, light intensity, culture temperature, CO2 concentration in feeding gas) which could influence the wastewater treatment efficiency were 0.05, 250 photons m(-2) s(-1), 28 degrees C and 5%, respectively. Under these conditions, the removal efficiency of COD reached up to 89.2%, while the total nitrogen and total phosphorous decreased by 64.52% and 82.20%, respectively. With the second treatment, COD in the wastewater was further reduced to less than 100 mg/L while it was only reduced to 542.9 mg/L after the first treatment. The treated wastewater could be discharged directly or subjected to for further treatment for recycling. In addition, 1.25 g/L of the biomass and 38.27% (dry basis, w%) of lipid content were reached after microalgal cultivation. (C) 2013 Elsevier Ltd. All rights reserved.
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