The Selective Use of Hypochlorite to Prevent Pond Crashes for Algae-Biofuel Production

Park, Sichoon; Van Ginkel, Steven W.; Pradeep, Priya; Igou, Thomas; Yi, Christine; Snell, Terry; Chen, Yongsheng

doi:10.2175/106143015x14362865227670

Title: The Selective Use of Hypochlorite to Prevent Pond Crashes for Algae-Biofuel Production

Journal Article · Fri Jan 01 00:00:00 EST 2016 · Water Environment Research

DOI:https://doi.org/10.2175/106143015x14362865227670· OSTI ID:1785541

Park, Sichoon ^[1]; Van Ginkel, Steven W. ^[1]; Pradeep, Priya ^[1]; Igou, Thomas ^[1]; Yi, Christine ^[1]; Snell, Terry ^[1]; Chen, Yongsheng ^[1]

Georgia Inst. of Technology, Atlanta, GA (United States)

Although algae-biofuels have many advantages including high areal productivity, algae can be preyed upon by amoebas, protozoans, ciliates, and rotifers, particularly in open pond systems. Furthermore, these higher organisms need to be controlled. In this study, Chlorella kessleri was used as the algal culture and Brachionus calyciflorus as the source of predation. The effect of sodium hypochlorite (bleach) was tested with the goal of totally inhibiting the rotifer while causing minor inhibition to the alga. The 24-hr LC50 for B. calyciflorus in spring water was 0.198 mg Cl/L while the 24-hr LC50 for C. kessleri was 0.321 mg Cl/L. However, chlorine dissipates rapidly as the algae serves as reductant. Results showed a chlorine dosage between 0.45 to 0.6 mg Cl/L and a dosing interval of two hours created the necessary chlorine concentrations to inhibit predation while letting the algae grow; thus giving algae farmers a tool to prevent pond crashes.

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Research Organization:: Arizona State Univ., Tempe, AZ (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office

DOE Contract Number:: EE0005996

OSTI ID:: 1785541

Journal Information:: Water Environment Research, Vol. 88, Issue 1; ISSN 1061-4303

Publisher:: Wiley - Water Environment Federation

Country of Publication:: United States

Language:: English

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