Application of real treated wastewater to starch production by microalgae: Potential effect of nutrients and microbial contamination
Application of real treated wastewater to starch production by microalgae: Potential effect of nutrients and microbial contamination
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DOI：
10.1016/j.bej.2021.107973
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发表时间：
2021-03-13
影响因子：
3.9
通讯作者：
Honda, Ryo
中科院分区：
文献类型：
--
作者：
Noguchi, Mana;Aizawa, Ryo;Honda, Ryo
一些积累淀粉的micmalgae是生产生物精炼应用的平台化学品的有前途的生物质资源。已经考虑使用经处理的废水作为培养基，因为真实的经处理的废水不仅含有营养物，而且含有来自活性污泥的细菌。在这项研究中，潜在的可行性的真实的处理废水的淀粉生产的小球藻相关的微藻进行了调查，通过评估的影响：1）化学成分和2）微生物污染的真实的处理后的废水，和3）消毒处理后的废水氯化。使用真实的废水显示出比模拟废水最高的微藻/碳水化合物生产率。对于高碳水化合物含量，相对低的氮浓度是重要的。同时，来自处理后的废水的生物污染物显示出对微藻生长的抑制，这表明在使用家庭处理后的废水作为生长介质的淀粉生产期间进行污染控制（例如氯化）的必要性。然后，三个氯化浓度进行了比较，和氯化在2.0毫克氯/L为15分钟是最有效的，以保持高比例的micmalgae/碳水化合物浓度（19.3毫克/L）。本研究结果为真实的废水处理的应用以及微藻生物量和胞内淀粉生产的放大提供了方向。
Some starch-accumulating micmalgae are promising biomass resources for producing platform chemicals for biorefinery applications. The use of treated wastewater as the cultivation medium has been considered because real treated wastewater contains not only nutrients, but also bacteria from activated sludge. In this study, the potential feasibility of real treated wastewater for starch production by Chlorella-related microalgae was investigated by evaluating the effect of: 1) chemical constituents and 2) microbial contamination in real treated wastewater, and 3) disinfection of treated wastewater by chlorination. The use of real wastewater showed the highest microalgae/carbohydrate productivity than simulated wastewaters. For high carbohydrate content, a relatively low nitrogen concentration was important. Meanwhile, biological contamination originating from the treated wastewater showed inhibition on microalgal growth, demonstrating the necessity for contamination control (e.g. chlorination) during starch production using domestic treated wastewater as the growth medium. Then, three chlorination concentrations were compared, and chlorination at 2.0 mg Cl/L for 15 min was the most effective to maintain a high proportion of micmalgae/carbohydrate concentration (19.3 mg/L). The findings of this study provide direction for the application of real treated wastewater and scale-up of micmalgae biomass and intracellular starch production.