Peyravi Majid, Jahanshahi Mohsen, Alimoradi Mahsa, Ganjian Etesam
Nanotechnology Research Institute, School of Chemical Engineering, Babol University of Technology, P.O.BOX: 484, Babol, Iran.
Bioprocess Biosyst Eng. 2016 Dec;39(12):1803-1816. doi: 10.1007/s00449-016-1655-0. Epub 2016 Aug 3.
A bench-scale integrated process based on submerged aerobic powdered activated carbon-membrane bioreactor (PAC-MBR) has been utilized and established for the treatment of landfill leachate. The results showed that the submerged PAC-MBR system effectively removed biodegradable trace organic compounds by the average removal rate about 71 % at optimum food to microorganism (F/M) ratio of 0.4 gCOD/g day under a HRT of 24 h. Adding nanofiltration (NF) process increased the treatment efficiency up to 99 %. Further, adding powdered activated carbon to activated sludge (AS) resulted in a higher adsorption capacity in comparison with AS. Adsorption isotherms were investigated and fitted by the Langmuir and Freundlich isotherm models in which the Langmuir model performed better. The specific oxygen uptake rate (SOUR) showed that adding PAC reduces the effects of COD on microorganism activities. NH-N, TKN and Heavy metals removal efficiency amounted to 97 ± 2, 96 ± 2, and 99 ± 2 %, respectively.
一种基于淹没式好氧粉末活性炭-膜生物反应器（PAC-MBR）的实验室规模集成工艺已被用于处理垃圾渗滤液。结果表明，在24小时的水力停留时间（HRT）下，当最佳食物与微生物比（F/M）为0.4gCOD/g·天，淹没式PAC-MBR系统能有效去除可生物降解的痕量有机化合物，平均去除率约为71%。添加纳滤（NF）工艺可将处理效率提高至99%。此外，与活性污泥（AS）相比，向活性污泥中添加粉末活性炭可提高吸附能力。研究了吸附等温线并用朗缪尔和弗伦德里希等温线模型进行拟合，其中朗缪尔模型表现更好。比氧摄取率（SOUR）表明添加PAC可降低COD对微生物活性的影响。NH-N、总凯氏氮（TKN）和重金属的去除效率分别达到97±2%、96±2%和99±2%。
