Qi Wanhe, Taherzadeh Mohammad J, Ruan Yunjie, Deng Yale, Chen Ji-Shuang, Lu Hui-Feng, Xu Xiang-Yang
Institute of Agricultural Bio-Environmental Engineering, College of Bio-Systems Engineering and Food Science, Yuhangtang Road 866, Hangzhou 310058, PR China.
Swedish Centre for Resource Recovery, University of Borås, Borås 50190, Sweden.
Bioresour Technol. 2020 Jun;305:123033. doi: 10.1016/j.biortech.2020.123033. Epub 2020 Feb 19.
This study explored the denitrification performance of solid-phase denitrification (SPD) systems packed with poly (butylene succinate)/bamboo powder composite to treat synthetic aquaculture wastewater under different salinity conditions (0‰ Vs. 25‰). The results showed composite could achieve the maximum denitrification rates of 0.22 kg (salinity, 0‰) and 0.34 kg NO-N m d (salinity, 25‰) over 200-day operation. No significant nitrite accumulation and less dissolved organic carbon (DOC) release (<15 mg/L) were found. The morphological and spectroscopic analyses demonstrated the mixture composites degradation. Microbial community analysis showed that Acidovorax, Simplicispira, Denitromonas, SM1A02, Marinicella and Formosa were the dominant genera for denitrifying bacteria, while Aspergillus was the major genus for denitrifying fungus. The co-network analysis also indicated the interactions between bacterial and fungal community played an important role in composite degradation and denitrification. The outcomes provided a potential strategy of DOC control and cost reduction for aquaculture nitrate removal by SPD.
本研究探讨了填充聚丁二酸丁二醇酯/竹粉复合材料的固相反硝化（SPD）系统在不同盐度条件下（0‰对25‰）处理合成水产养殖废水的反硝化性能。结果表明，在200天的运行过程中，该复合材料在盐度为0‰时可实现最大反硝化速率0.22 kg，在盐度为25‰时可实现最大反硝化速率0.34 kg NO-N m² d。未发现明显的亚硝酸盐积累，且溶解有机碳（DOC）释放量较少（<15 mg/L）。形态学和光谱分析表明了混合复合材料的降解情况。微生物群落分析表明，嗜酸菌属、简单螺旋菌属、脱氮单胞菌属、SM1A02、海栖菌属和福尔摩沙菌属是反硝化细菌的优势属，而曲霉属是反硝化真菌的主要属。共网络分析还表明，细菌和真菌群落之间的相互作用在复合材料降解和反硝化过程中发挥了重要作用。这些结果为通过SPD去除水产养殖硝酸盐提供了一种控制DOC和降低成本的潜在策略。
