Department of Civil, Environmental, and Sustainable Engineering, Arizona State University, Tempe, Arizona 85287, USA.
Water Sci Technol. 2009;60(12):3189-97. doi: 10.2166/wst.2009.603.
A unique sequence of anaerobic filter/suspended anaerobic/aerobic (AO) reactor/aerobic filter system was developed to alleviate the drawbacks of conventional suspended growth and fixed growth systems. An anaerobic filter (AF) was used to efficiently produce volatile fatty acids (VFAs) prior to the aerobic suspended growth. A second anaerobic reactor was installed in the A/O return activated sludge line to improve phosphorus uptake by potentially controlling glycogen accumulating organisms (GAOs). One biological aerobic filter (BAF) was used for nitrification followed by an anoxic filter for denitrification and a second BAF was used for effluent polishing. The meat packing wastewater had a biochemical oxygen demand (BOD) of 853 mg/L and total nitrogen (T-N) and total phosphorus (T-P) concentrations of 61.1 mg/L and 5.8 mg/L, respectively. The BOD removal efficiency was 99.0-99.7% and the suspended solids (SS) concentration in the effluent was below 10 mg/L. The T-N removal efficiency was maintained at greater than 75.0% except at low C/N ratios. A high T-P removal efficiency, 74.7-83.9%, was also obtained when the system was operated at a hydraulic retention time of 15.7 hrs. The AF successfully produced VFAs that aided in phosphorus removal. Additionally, recycled concrete aggregate used as attachment media in the biological filters continuously provided micronutrients and stabilized the pH.
开发了一种独特的厌氧滤池/悬浮厌氧/好氧（AO）反应器/好氧滤池系统，以缓解传统悬浮生长和固定生长系统的缺点。厌氧滤池（AF）用于在好氧悬浮生长之前高效地生产挥发性脂肪酸（VFAs）。在 A/O 回流活性污泥线中安装了第二个厌氧反应器，通过潜在控制糖原积累菌（GAO）来提高磷的吸收。一个生物好氧滤池（BAF）用于硝化，然后是缺氧滤池用于反硝化，第二个 BAF 用于出水抛光。肉类包装废水的生化需氧量（BOD）为 853mg/L，总氮（T-N）和总磷（T-P）浓度分别为 61.1mg/L 和 5.8mg/L。BOD 去除效率为 99.0-99.7%，出水的悬浮固体（SS）浓度低于 10mg/L。除了在低 C/N 比下，T-N 去除效率保持在 75.0%以上。当系统在水力停留时间为 15.7 小时运行时，也获得了 74.7-83.9%的高 T-P 去除效率。AF 成功地生产了 VFAs，有助于去除磷。此外，用作生物过滤器中附着介质的再生混凝土骨料不断提供微量元素并稳定 pH 值。
