Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Seoul 02792, South Korea; Water Treatment Business Team, BKT Co. Ltd., Daejeon 34109, South Korea.
Department of Civil and Environmental Engineering, and TBSI, University of California, Berkeley, CA 94720, United States.
Water Res. 2017 Oct 15;123:86-95. doi: 10.1016/j.watres.2017.06.049. Epub 2017 Jun 19.
A bench-scale anaerobic membrane bioreactor (AnMBR) equipped with submerged flat-sheet ceramic membranes was operated at mesophilic conditions (30-35 °C) treating domestic wastewater (DWW) supplemented with food wasterecycling wastewater (FRW) to increase the organic loading rate (OLR) for better biogas production. Coupling ceramic membrane filtration with AnMBR treatment provides an alternative strategy for high organic wastewater treatment at short hydraulic retention times (HRTs) with the potential benefits of membrane fouling because they have a high hydrophilicity and more robust at extreme conditions. The anaerobic ceramic MBR (AnCMBR) treating mixture of actual FRW with DWW (with an influent chemical oxygen demand (COD) of 2,115 mg/L) was studied to evaluate the treatment performance in terms of organic matter removal and methane production. COD removal during actual FRW with DWW operation averaged 98.3 ± 1.0% corresponding to an average methane production of 0.21 ± 0.1 L CH/g COD. Biogas sparging, relaxation and permeate back-flushing were concurrently employed to manage membrane fouling. A flux greater than 9.2 L m h (LMH) was maintained at 13 h HRT for approximately 200 days without chemical cleaning at an OLR of 2.95 kg COD m d. On day 100, polyvinyl alcohol (PVA)-gel beads were added into the AnCMBR to alleviate the membrane fouling, suggesting that their mechanical scouring effect contributed positively in reducing the fouling index (FI). Although these bio-carriers might accelerate the breaking up of bio-flocs, which released a higher amount of soluble microbial products (SMP), a 95.4% SMP rejection was achieved. Although the retention efficiency of dissolved organic carbons (DOC) was 91.4% across the ceramic membrane, a meaningful interpretation of organic carbon detection (OCD) fingerprints was conducted to better understand the ceramic membrane performance.
采用浸没式平板陶瓷膜的中温（30-35°C）升流式厌氧膜生物反应器（AnMBR）处理添加食物废水循环（FRW）的生活污水（DWW），以提高有机负荷率（OLR），从而获得更好的沼气产量。将陶瓷膜过滤与 AnMBR 处理相结合，为在短水力停留时间（HRT）下处理高浓度有机废水提供了一种替代策略，并且由于其具有高亲水性和在极端条件下更稳定的特点，因此具有膜污染的潜在优势。研究了实际 FRW 与 DWW 混合物（进水化学需氧量（COD）为 2115mg/L）在厌氧陶瓷 MBR（AnCMBR）中的处理性能，以评估有机物去除和甲烷生成方面的处理性能。实际 FRW 与 DWW 运行过程中的 COD 去除率平均为 98.3±1.0%，平均甲烷产量为 0.21±0.1L CH/g COD。采用生物气鼓泡、松弛和渗透液反冲洗同时进行膜污染管理。在 13h 的 HRT 下，OLR 为 2.95kg COD/m3·d 时，通量大于 9.2L/m2·h（LMH），无需化学清洗即可维持约 200 天。在第 100 天，将聚乙烯醇（PVA）-凝胶珠添加到 AnCMBR 中以减轻膜污染，表明其机械冲刷作用有助于降低污染指数（FI）。尽管这些生物载体可能会加速生物絮体的破裂，从而释放出更多的可溶性微生物产物（SMP），但仍实现了 95.4%的 SMP 截留率。尽管陶瓷膜对溶解有机碳（DOC）的截留效率为 91.4%，但仍对有机碳检测（OCD）指纹进行了有意义的解释，以更好地了解陶瓷膜的性能。
