| 钱锐,刘辉,徐慧婷,马长文,陈浩,梁珺宇,叶建锋.利用藻菌共生体系强化养猪废水厌氧消化液培养微藻[J].农业环境科学学报,2021,40(7):1557-1564. |
| 利用藻菌共生体系强化养猪废水厌氧消化液培养微藻 |
| Enhancement of microalgae culture in anaerobic fermentation liquid of swine wastewater by algal –bacteria symbiotic system |
| 投稿时间：2020-09-19 |
| DOI：10.11654/jaes.2020-1095 |
| 中文关键词: 养猪废水消化液 小球藻 活性污泥 藻菌共生 微藻培养 污水资源化处理 |
| 英文关键词: fermentation liquid of swine wastewater Chlorella vulgaris activated sludge algal-bacteria symbiotic system microalgae culture wastewater resource treatment |
| 基金项目:国家重点研发计划项目（2017YFE0135500，2018YFD1100502-02）；上海自然科学基金项目（19ZR1443700）；国家自然科学基金项目（51908355）；上海科技创新行动计划项目（19DZ1204500）；上海第二工业大学研究生项目基金 |
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| 中文摘要: |
| 利用养猪废水厌氧消化液培养微藻是一项极具潜力的污水资源化技术，如何强化微藻产量是该技术领域的研究热点。本研究在利用养猪废水厌氧消化液培养微藻时，通过投加活性污泥，构成藻菌共生体系，并对关键工艺参数（藻菌比例、微藻接种浓度以及光照周期）进行优化，分析藻菌共生系统培养微藻以及回收氮磷的适宜条件和相关机理。结果表明，在适宜的藻菌比（1∶0.2）条件下，藻菌共生系统有利于提高微藻生长量以及氮磷的回收效率。在优化的接种浓度和光照条件下，进一步运行藻菌共生反应器和微藻纯培养反应器，前者有利于提供微藻生长的碳源，维持体系的酸碱环境，从而提高微藻的生长限值，水力停留时间（HRT）为2 d时，可收获更多的微藻生物质（0.16 g·L-1·d-1），相对于微藻纯培养反应器提高了117%。延长HRT至12 d，微藻呈现二次生长，并且具有较好的污染物去除率。 |
| 英文摘要: |
| The cultivation of microalgae using an anaerobic fermentation solution of swine wastewater（FS-SW）is a potential wastewater recycling technology. The improvement in the yield of microalgae is a popular research topic in this field. In this study, the FS-SW was used to cultivate microalgae while activated sludge was added to form an algal–bacteria symbiotic system. The key technological parameters （i.e., algal bacteria ratio, microalgae inoculation concentration, and illumination）were optimized to explore the optimal conditions of the algal–bacteria symbiotic system for microalgae harvest and nitrogen and phosphorus recovery, and the related mechanisms were analyzed. The results showed that the algal–bacteria symbiotic system was more beneficial to microalgae accumulation and nitrogen and phosphorus recovery with the proper algae bacteria ratio（1∶0.2）. The algal–bacteria symbiotic reactor and pure algae-cultivation reactor were set up and further operated under the optimal inoculum and light conditions. Evidently, the algal-bacteria symbiotic system was beneficial to supplying multiple carbon sources for the macroalgae and maintain the pH of the system, thereby improving the maximum microalgae yield. When the hydraulic retention time（HRT）was set to 2 days, the microalgae biomass（0.16 g·L-1·d-1）harvest increased by 117% than that of the pure algae-cultivation reactor. In addition, secondary growth of the microalgae and high wastewater treatment efficiency were obtained when the HRT was set to 12 days. |
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