Liu Guoqiang, Wang Jianmin
School of Environment, Guangdong Engineering Research Center of Water Treatment Processes and Materials, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, 510632, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510275, China; Frontier Environmental Technology, LLC, 12687 Cinnamon Court, Rolla, MO, 65401, USA.
Frontier Environmental Technology, LLC, 12687 Cinnamon Court, Rolla, MO, 65401, USA; Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.
J Environ Manage. 2017 Sep 1;199:222-228. doi: 10.1016/j.jenvman.2017.05.047. Epub 2017 May 23.
Nitrogen discharge from decentralized and onsite wastewater treatment systems, such as recirculating sand filters, stabilization ponds, and septic tanks, is an important source of groundwater and surface water contamination. This study demonstrated a simple baffled bioreactor (BBR) technology, operated with an intermittent aeration mode, that effectively removed nearly all nitrogen for small flow wastewater treatment. The BBR is characterized by an aeration zone, followed by an integrated internal settler, which automatically retains a high biomass concentration of approximately 6 g/L without using a separate sludge return device. Long-term testing results indicated that this process had reduced the chemical oxygen demand and total nitrogen concentration to approximately 20 mg/L and less than 3 mg-N/L, respectively, under an operational temperature of 7.1 °C to 24.7 °C. The average effluent ammonia and nitrate concentrations were 0.75 and 0.61 mg-N/L, respectively, indicating that both nitrification and denitrification had been completed. In addition to nitrogen removal, this BBR had removed approximately 65% of the total phosphorus.
来自分散式和现场污水处理系统（如循环砂滤池、稳定塘和化粪池）的氮排放是地下水和地表水的重要污染源。本研究展示了一种简单的折流式生物反应器（BBR）技术，该技术采用间歇曝气模式运行，能有效去除小流量废水处理中的几乎所有氮。BBR的特点是有一个曝气区，其后是一个集成式内部沉降器，无需使用单独的污泥回流装置就能自动保持约6 g/L的高生物量浓度。长期测试结果表明，在7.1℃至24.7℃的运行温度下，该工艺分别将化学需氧量和总氮浓度降低至约20 mg/L和低于3 mg-N/L。出水氨和硝酸盐的平均浓度分别为0.75和0.61 mg-N/L，表明硝化和反硝化均已完成。除了脱氮外，该BBR还去除了约65%的总磷。
