Department of Environmental Science and Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan, Zhejiang 316022, China.
Department of Environmental Science and Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan, Zhejiang 316022, China.
Bioresour Technol. 2017 Nov;243:800-809. doi: 10.1016/j.biortech.2017.06.127. Epub 2017 Jun 26.
Development of simultaneous nitrification-denitrification (SND) is a promising approach for nitrogen-rich water purification. Coupling biofilm reactors with novel biodegradable carrier of Pumelo Peel (PP) and various conventional plastic fillers (polyurethane filler, SPR-1 suspension filler, TA-II elastic filler and sphere filler) were examined to achieve SND in this study. Results represented that partially coupled with PP could achieve highly efficient SND. Optimal performance appealed in a bioreactor of coupling PP and SPR-1filler with ammonia and total nitrogen removal efficiencies of 96.8±4.0% and 78.9±9.5%, respectively, as well as low effluent COD of 1.85±0.86mgL. Notably, PP and conventional plastic filler played obviously different roles in combined bioreactor system. Microbial analysis suggested that dominant genera were Thiothrix, Gemmata, unclassified comanonadaceae, unclassified Rhizobiales, Salipiger, Chloronema and Klebsiella in optimal combined bioreactor, which indicated novel co-existence of heterotrophic nitrification, solid-phase, non-solid-phase heterotrophic and sulfur-based autotrophic denitrification for achieving efficient SND.
同步硝化反硝化（SND）的发展是一种很有前途的富氮水净化方法。本研究考察了将生物膜反应器与新型可生物降解的柚子皮（PP）载体和各种传统塑料填料（聚氨酯填料、SPR-1 悬浮填料、TA-II 弹性填料和球形填料）相结合，以实现 SND。结果表明，部分耦合 PP 可以实现高效的 SND。在耦合 PP 和 SPR-1 填料的生物反应器中，氨氮和总氮的去除效率分别达到 96.8±4.0%和 78.9±9.5%，出水 COD 低至 1.85±0.86mg/L，表现出最佳性能。值得注意的是，PP 和传统塑料填料在组合生物反应器系统中发挥了明显不同的作用。微生物分析表明，在最佳组合生物反应器中，优势属为硫丝菌属、真杆菌属、未分类的 comamonadaceae 科、未分类的根瘤菌目、盐单胞菌属、 Chloronema 和克雷伯氏菌属，这表明了异养硝化、固相反硝化、非固相反硝化和硫自养反硝化的新型共存，从而实现了高效的 SND。
