School of Chemical Engineering, College of Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran.
Appl Biochem Biotechnol. 2014 Jan;172(1):131-40. doi: 10.1007/s12010-013-0480-z. Epub 2013 Sep 20.
In this work, capability of the green microalga (MA), Chlorella vulgaris, in treating synthetic anaerobic effluent of municipal wastewater was investigated. While pure C. vulgaris (100 % MA) provided maximum soluble chemical oxygen demand (sCOD) and N-NH4(+) removal efficiencies of 27 and 72 % respectively, addition of activated sludge (AS) to MA in different mass ratios (91, 80, 66.7, 9 % MA) improved wastewater treatment efficiency. Thus giving maximum sCOD and N-NH4(+) removal efficiencies 85 and 86.3 % (for MA/AS = 10/1), respectively. Utilizing AS without C. vulgaris, for treating the synthetic wastewater resulted in 87 % maximum sCOD and 42 % maximum N-NH4(+) removal efficiencies. Furthermore, algal growth and specific growth rates were measured in the systems with microalga as the dominant cellular population. As a result, faster algal growth was observed in mixed systems. Specific growth rate of C. vulgaris was 0.14 (day(-1)) in 100 % MA and 0.39 (day(-1)) in 80 % MA. Finally, data gathered by online measurement of dissolved oxygen indicate that algae-activated sludge mixture improves photosynthetic activity of examined microalga strain during anaerobic effluent treatment.
在这项工作中，研究了小球藻（MA）处理城市废水的合成厌氧废水的能力。当纯小球藻（100% MA）分别提供最大的可溶性化学需氧量（sCOD）和 N-NH4(+)去除效率 27%和 72%时，向 MA 中添加不同质量比的活性污泥（AS）（91%、80%、66.7%、9% MA）可提高废水处理效率。因此，分别给出了最大的 sCOD 和 N-NH4(+)去除效率 85%和 86.3%（MA/AS=10/1）。利用没有小球藻的 AS 处理合成废水，可达到最大的 87% sCOD 和 42%最大的 N-NH4(+)去除效率。此外，在以微藻为主要细胞群体的系统中测量了藻类的生长和比生长速率。结果表明，在混合系统中观察到更快的藻类生长。在 100% MA 中，小球藻的比生长速率为 0.14（天(-1)），在 80% MA 中为 0.39（天(-1)）。最后，通过在线测量溶解氧收集的数据表明，藻类-活性污泥混合物可提高所研究的微藻菌株在处理厌氧废水中的光合作用活性。
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