Scientific Research Academy of Guangxi Environmental Protection, Jiaoyu Road 5, QingXiu Distr., Nanning 530022, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian Distr., Beijing 100085, China.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian Distr., Beijing 100085, China.
J Environ Sci (China). 2016 Oct;48:59-68. doi: 10.1016/j.jes.2015.12.031. Epub 2016 Mar 19.
Both internal carbon source and some external carbon sources were used to improve the nutrient removal in Anaerobic-Anoxic-Oxic-Membrane Bioreactor (A/O-MBRs), and their technical and cost analysis was investigated. The experimental results showed that the nutrient removals were improved by all the carbon source additions. The total nitrogen and phosphorus removal efficiency were higher in the experiments with external carbon source additions than that with internal carbon source addition. It was found that pathways of nitrogen and phosphorus transform were different dependent on different carbon source additions by the mass balance analysis. With external carbon source addition, the simultaneous nitrification and denitrification occurred in aerobic zone, and the P-uptake in aerobic phase was evident. Therefore, with addition of C-MHP (internal carbon source produced from sludge pretreatment by microwave-HO process), the denitrification and phosphorus-uptake in anoxic zone was notable. Cost analysis showed that the unit nitrogen removal costs were 57.13CNY/kg N of C-acetate addition and 54.48CNY/kgN of C-MHP addition, respectively. The results indicated that the C-MHP has a good technical and economic feasibility to substitute external carbon sources partially for nutrient removal.
采用内部碳源和一些外部碳源来提高厌氧-缺氧-好氧-膜生物反应器（A/O-MBRs）中的养分去除效果，并对其技术和成本进行了分析。实验结果表明，所有碳源的添加都提高了养分的去除效果。与内部碳源添加相比，外部碳源添加的总氮和总磷去除效率更高。通过质量平衡分析发现，不同碳源的添加会导致氮磷转化途径的不同。通过外部碳源的添加，好氧区发生同步硝化反硝化，好氧段明显存在磷的吸收。因此，通过添加 C-MHP（微波-HO 工艺预处理污泥产生的内部碳源），缺氧区的反硝化和磷吸收明显。成本分析表明，添加 C-醋酸盐的单位氮去除成本为 57.13 CNY/kg N，添加 C-MHP 的单位氮去除成本为 54.48 CNY/kg N。结果表明，C-MHP 具有良好的技术和经济可行性，可以部分替代外部碳源来去除养分。
