Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China.
Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Department of Environmental Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan 316022, China.
Bioresour Technol. 2014 Nov;172:22-31. doi: 10.1016/j.biortech.2014.08.116. Epub 2014 Sep 3.
The quality of raw water is getting worse in developing countries because of the inadequate treatment of municipal sewage, industrial wastewater and agricultural runoff. Aiming at the biofilm enrichment and pollutant removal, two pilot-scale biofilm reactors were built with different biological carriers. Results showed that compared with the blank carrier, the biofilm was easily enriched on the biofilm precoated carrier and less nitrite accumulation occurred. The removal efficiencies of NH4(+)-N, DOC and UV254 increased under the aeration condition, and a optimum DO level for the adequate nitrification was 1.0-2.6mgL(-1) with the suitable temperature range of 21-22°C. Study on the trihalomethane prediction model indicated that the presentence of algae increased the risk of disinfection by-products production, which could be effectively controlled via manual algae removing and light shading. In this study, the performance of biofilm pretreatment process could be enhanced under the optimized condition of DO level and biofilm carrier.
发展中国家由于城市污水、工业废水和农业径流处理不足，原水水质日益恶化。针对生物膜的富集和污染物去除，采用两种不同生物载体构建了两个中试规模的生物膜反应器。结果表明，与空白载体相比，生物膜更容易在生物膜预涂载体上富集，且亚硝酸积累较少。曝气条件下，NH4(+)-N、DOC 和 UV254 的去除效率提高，充分硝化的最佳 DO 水平为 1.0-2.6mgL(-1)，适宜温度范围为 21-22°C。三卤甲烷预测模型研究表明，藻类的存在增加了消毒副产物生成的风险，通过人工藻类去除和遮光可以有效控制。本研究在优化 DO 水平和生物膜载体条件下，提高了生物膜预处理工艺的性能。
