Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
Bioresour Technol. 2012 Oct;122:22-6. doi: 10.1016/j.biortech.2012.02.018. Epub 2012 Feb 14.
Conventional MBR has been mostly based on floc sludge and the use of costly microfiltration membranes. Here, a novel aerobic granule (AG)-mesh filter MBR (MMBR) process was developed for cost-effective wastewater treatment. During 32-day continuous operation, a predominance of granules was maintained in the system, and good filtration performance was achieved at a low trans-membrane pressure (TMP) of below 0.025 m. The granules showed a lower fouling propensity than sludge flocs, attributed to the formation of more porous biocake layer at mesh surface. A low-flux and low-TMP filtration favored a stable system operation. In addition, the reactor had high pollutant removal efficiencies, with a 91.4% chemical oxygen demand removal, 95.7% NH(4)(+) removal, and a low effluent turbidity of 4.1 NTU at the stable stage. This AG-MMBR process offers a promising technology for low-cost and efficient treatment of wastewaters.
传统的 MBR 大多基于絮状污泥和使用昂贵的微滤膜。在这里，开发了一种新型的好氧颗粒（AG）-滤网 MBR（MMBR）工艺，用于经济高效的废水处理。在 32 天的连续运行中，系统中保持了颗粒的优势，并在低于 0.025 m 的低跨膜压力（TMP）下实现了良好的过滤性能。颗粒比污泥絮体具有更低的污染倾向，这归因于在滤网表面形成了更具多孔性的生物膜层。低通量和低 TMP 过滤有利于稳定的系统运行。此外，该反应器具有高的污染物去除效率，在稳定阶段 COD 去除率为 91.4%，NH4+去除率为 95.7%，出水浊度低至 4.1 NTU。该 AG-MMBR 工艺为低成本、高效处理废水提供了一种很有前途的技术。
