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Biological fixation of CO 2 using microalgae is a potential CO 2 reduction strategy which can be applied to the oil sands operations in Alberta. These operations also produce large amounts of oil sands process water (OSPW), which can act as a growth medium for the microalgae. In this study, three different microalgae: Botryococcus braunii, Chlorella pyrenoidosa and Chlorella kessleri were investigated for their ability to grow in OSPW, and to uptake CO 2 . Also, the effect of phosphate, nitrate, CO 2 concentrations and light intensity were studied using a fractional two-level and a full two-level factorial design. These investigations eliminated Botryococcus braunii as it cannot grow in OSPW, and demonstrated that Chlorella kessleri has a higher CO 2 uptake rate than Chlorella pyrenoidosa. Moreover, CO 2 concentration, light intensity and phosphate concentration proved to have the strongest effects (in that order) on the growth and CO 2 uptake rate of Chlorella kessleri.

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The anaerobic processes literature review contains a comprehensive discussion of articles published in 2011, including both original research and review articles. Specific attention is paid to studies on design and optimization of systems using anaerobic processes, as well as characterizing the microflora involved in such processes.This year's anaerobic processes literature review is divided into the following sections:biogas treatment and use, integrated approaches, modeling advances, process technology, hydrogen production, microbiology, anammox, treatability studies, and toxicity.

This literature review provides a comprehensive overview of the research published in 2012 concerning anaerobic processes and their role in wastewater treatment technologies. Included in this review is a discussion on the characterization, development and optimization of novel approaches for waste treatment. The scope of this year's anaerobic processes literature review will include the following topics: process technology, integrated approaches, treatability studies, toxicity, modeling advances, microbiology, anammox, hydrogen production, and biogas treatment and use.