| 微藻混合培养强化餐厨沼液处理效果及机制 |
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| 引用本文： | 刘艳,杨敏,陈宏,蒋朝晖,赵文玉,王泓,张俊亚.微藻混合培养强化餐厨沼液处理效果及机制[J].环境工程,2021,39(3):54. |
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| 作者姓名： | 刘艳 杨敏 陈宏 蒋朝晖 赵文玉 王泓 张俊亚 |
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| 作者单位： | 长沙理工大学化学与食品工程学院,长沙410114;长沙理工大学洞庭湖水环境治理与生态修复湖南省重点实验室,长沙410114;长沙理工大学化学与食品工程学院,长沙410114;长沙理工大学洞庭湖水环境治理与生态修复湖南省重点实验室,长沙410114;中国科学院生态环境研究中心,北京100085;长沙理工大学洞庭湖水环境治理与生态修复湖南省重点实验室,长沙410114;中国科学院生态环境研究中心,北京100085 |
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| 基金项目： | 湖南省自然科学基金（2019JJ50646）；湖南省科技创新项目重点研发计划（2018SK2011）；湖南省教育厅基金一般项目（18C0206）；洞庭湖水环境治理与生态修复湖南省重点实验室开放基金（2018DT02）。 |
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| 摘 要： | 利用微藻混合培养处理餐厨垃圾消化沼液具有高效固碳脱氮的优势，然而存在优选混合培养比和协同强化作用机制不明的问题。对比分析了普通小球藻（Chlorella vulgaris）、斜生栅藻（Scenedesmus obliquus）和雨生红球藻（Haematococcus pluvislis）在单一和混合培养模式下的微藻生长特性和沼液处理效果，研究了微藻的胞外可溶性聚合物（SAP）对微藻生长的促进效果及竞争协同机制。结果表明:斜生栅藻和雨生红球藻为最佳的微藻组合，最大生物量为0.655 g/L，COD去除率为76.2%，NH4+-N去除率为60.1%；雨生红球藻和斜生栅藻之间存在hormesis效应，释放的可溶性微藻产物SAP作为异种化感物可被对方利用，且两者对不同污染组分同化能力存在差异性，形成协同竞争作用缓解了高浓度废水及SAP对微藻生长的抑制，可为微藻混合培养提高生物质产量与强化沼液处理效果提供参考。
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| 关 键 词： | 微藻 餐厨垃圾消化沼液 混合培养 胞外可溶性聚合物 |
| 收稿时间： | 2020-03-08 |
ENHANCEMENT AND MECHANISM OF MIXED ALGAE CULTIVATION FOR TREATMENT OF KITCHEN WASTE DIGESTATE EFFLUENT |
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| Affiliation: | 1. School of Chemical and Food Engineering, Changsha University of Science and Technology, Hunan, Changsha 410114, China;2. Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China;3. Chinese Academy of Sciences, Center for Eco-Environmental Research, Beijing 100085, China |
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| Abstract: | The use of microalgae mixed culture for the treatment of kitchen wastes digestate effluent has the advantages of efficient carbon fixation and denitrification. However, the preferred mixed culture ratio and synergistic enhancement mechanism are still unclear. In this study, the growth characteristics of microalgae and efficiency of digestate effluent treatment of Chlorella vulgaris, Scenedesmus obliquus, and Haematococcus pluvislis in single and mixed culture modes were compared. The stimulation effect of the soluble algae products (SAP) on microalgae growth and the synergistic mechanism of competition between different microalgae were studied. The mixture cultivation of Scenedesmus obliquus and Haematococcus pluvialis was the optimized match with maximum biomass of 0.655 g/L, COD removal rate of 76.2% and NH4+-N removal rate of 60.1%. Interspecific SAPs produced by Haematococcus pluvialis and Scenedesmus obliquus could be consumed as an allelo-chemicals by each other, following by the hormesis effect, and the two microalgae had different assimilation abilities onto different pollutants, forming a synergistic competition to alleviate the inhibition of high concentration wastewater and SAP generated by themselves. This mechanism of synergistic competition could explain the reason why mixed culture of microalgae increased biomass yield and enhanced the treatment of kitchen waste digestate effluent. |
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