Department of Chemical Engineering, University of Barcelona, C/Martí i Franquès, 1-11, 08028 Barcelona, Spain.
Department of Mechanical, Aerospace and Civil Engineering, Brunel University, Kingston Lane, UB8 3PH Uxbridge, Middlesex, UK.
Bioresour Technol. 2016 Jan;200:820-9. doi: 10.1016/j.biortech.2015.10.063. Epub 2015 Oct 23.
A novel scheme was developed for the treatment of municipal wastewater integrating nitritation/denitritation with the selection of polyhydroxyalkanoates (PHA) storing biomass under an aerobic/anoxic, feast/famine regime. The process took place in a sequencing batch reactor (SBR) and the subsequent PHA accumulation in a batch reactor. The carbon source added during the selection and accumulation steps consisted of fermentation liquid from the organic fraction of municipal solids waste (OFMSW FL) (Period I) and OFMSW and primary sludge fermentation liquid (Period II). Selection of PHA storing biomass was successful and denitritation was driven by internally stored PHA during the famine phase. Under optimum conditions of SBR operation ammonia removal was 93%, reaching a maximum nitrite removal of 98%. The treated effluent met the nitrogen limits, while PHA-storing biomass was successfully selected. The maximum accumulation of PHA was 10.6% (wt.) since the nutrients present in the carbon source promoted bacterial growth.
开发了一种新方案，用于在有氧/缺氧、饱食/饥饿条件下选择聚羟基烷酸酯（PHA）储存生物量，将市政废水的硝化/反硝化进行整合处理。该过程在序批式反应器（SBR）中进行，随后在批式反应器中进行 PHA 积累。在选择和积累步骤中添加的碳源由城市固体废物有机部分（OFMSW）发酵液（第 I 期）和 OFMSW 和初沉污泥发酵液（第 II 期）组成。PHA 储存生物量的选择取得了成功，在饥饿阶段由内部储存的 PHA 驱动反硝化。在 SBR 最佳运行条件下，氨去除率为 93%，达到了 98%的最大亚硝酸盐去除率。处理后的出水达到了氮限制，同时成功选择了 PHA 储存生物量。由于碳源中存在的营养物质促进了细菌生长，PHA 的最大积累量为 10.6%（wt.）。
