Insel Güçlü, Karagunduz Ahmet, Aksel Murat, Cokgor Emine, Kor-Bicakci Gokce, Ozyildiz Goksin, Toroz Ismail, Keskinler Bulent
Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey E-mail:
Environmental Engineering Department, Gebze Technical University, Gebze, Izmit, Turkey.
Water Sci Technol. 2018 Apr;77(7-8):1899-1908. doi: 10.2166/wst.2018.065.
In this study, an integrated aerobic membrane bioreactor (MBR)-nanofiltration (NF) system has been applied for advanced treatment of Opium processing wastewaters to comply with strict discharge limits. Aerobic MBR treatment was successfully applied to high strength industrial wastewater. In aerobic MBR treatment, a non-fouling unique slot aeration system was designed using computational fluid dynamics techniques. The MBR was used to separate treated effluent from dispersed and non-settleable biomass. Respirometric modeling using MBR sludge indicated that the biomass exhibited similar kinetic parameters to that of municipal activated sludge systems. Aerobic MBR/NF treatment reduced chemical oxygen demand (COD) from 32,000 down to 2,500 and 130 mg/L, respectively. The MBR system provided complete removal of total inorganic nitrogen; however, nearly 50 mgN/L organic nitrogen remained in the permeate. Post NF treatment after MBR permeate reduced nitrogen below 20 mgN/L, providing nearly total color removal. In addition, a 90% removal in the conductivity parameter was reached with an integrated MBR/NF system. Finally, post NF application to MBR permeate was found not to be practical at higher pH due to low flux (3-4 L/m/hour) with low recovery rates (30-40%). As the permeate pH lowered to 5.5, 75% of NF recovery was achieved at a flux of 15 L/m/hour.
在本研究中，集成式好氧膜生物反应器（MBR）-纳滤（NF）系统已应用于鸦片加工废水的深度处理，以符合严格的排放限值。好氧MBR处理成功应用于高强度工业废水。在好氧MBR处理中，使用计算流体动力学技术设计了一种无污垢的独特缝隙曝气系统。MBR用于将处理后的出水与分散且不可沉降的生物质分离。使用MBR污泥进行的呼吸计量模型表明，该生物质表现出与城市活性污泥系统相似的动力学参数。好氧MBR/NF处理分别将化学需氧量（COD）从32,000降至2,500和130 mg/L。MBR系统实现了总无机氮的完全去除；然而，渗透液中仍残留近50 mgN/L的有机氮。MBR渗透液经过纳滤后处理，将氮含量降至20 mgN/L以下，几乎实现了颜色的完全去除。此外，集成式MBR/NF系统使电导率参数降低了90%。最后，发现由于通量较低（3-4 L/m/小时）且回收率较低（30-40%），在较高pH值下将纳滤应用于MBR渗透液并不实际。当渗透液pH值降至5.5时，在通量为15 L/m/小时的情况下实现了75%的纳滤回收率。
