Wang Yuan-Zhu, Cheng Peng-Fei, Liu De-Fu, Liu Tian-Zhong
College of Hydraulic and Environmental Engineering, Engineering Research Center of Eco-environment in Three Gorges Reservior Region, Ministry of Education, China Three Gorges University, Yichang 443002, China.
School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan 430072, China.
Huan Jing Ke Xue. 2017 Aug 8;38(8):3354-3361. doi: 10.13227/j.hjkx.201701113.
Piggery wastewater treatment with microalgae is a biological recycling technology. To evaluate the purification effect, this study investigated the treatment of piggery wastewater at different dilution ratios with by attached cultivation and lipid production of algae cells and explored the tolerance of to the piggery wastewater, which has high ammonia nitrogen. The piggery wastewater was diluted with purified water 1-, 2-, 5-, and 10-fold in culture media. The removal efficiencies of COD, ammonia nitrogen, total nitrogen, and total phosphorus and the enrichment effect of the heavy metals copper, zinc, and iron were measured. Meanwhile, we investigated the lipid production of in variously diluted wastewater (1-, 2-, 5-, and 10-fold). It turned out that the purification effects of COD, ammonia nitrogen, total nitrogen, and total phosphorus were best when the piggery wastewater was diluted 5-fold, and the removal efficiencies were 86.8%, 94.1%, 85.2%, and 84.3%, respectively. Correspondingly, the lipid content was as high as 32.7%, and the removal efficiencies of the heavy metals copper, zinc, and iron were 72.9%, 70.0%, and 73.0%, respectively. The biomass productivity was 4.21 g·(m·d) at the end of the experiment. This research makes an effective connection between microalgae and piggery wastewater, which is difficult to purify deeply, and provides a theoretical basis for achieving algal biofuel production and decreasing the cost of wastewater treatment.
利用微藻处理猪场废水是一种生物循环技术。为评估其净化效果，本研究通过藻类细胞的附着培养和脂质生产，研究了不同稀释比例的猪场废水处理情况，并探索了藻类对高氨氮猪场废水的耐受性。在培养基中用纯净水将猪场废水分别稀释1倍、2倍、5倍和10倍。测定了化学需氧量（COD）、氨氮、总氮和总磷的去除效率以及重金属铜、锌和铁的富集效果。同时，我们研究了在不同稀释倍数（1倍、2倍、5倍和10倍）的废水中藻类的脂质生产情况。结果表明，猪场废水稀释5倍时，COD、氨氮、总氮和总磷的净化效果最佳，去除效率分别为86.8%、94.1%、85.2%和84.3%。相应地，脂质含量高达32.7%，重金属铜、锌和铁的去除效率分别为72.9%、70.0%和73.0%。实验结束时生物量生产力为4.21 g·(m·d)。本研究将微藻与难以深度净化的猪场废水有效联系起来，为实现藻类生物燃料生产和降低废水处理成本提供了理论依据。
