Noor M J M M, Muyibi S A, Ahmed T, Ghazall A H, Jusoh A, Idris A, Ahmadun F R, Nagaoka H, Aya H
Dept of Civil Engineering, Universiti Putra Malaysia, Serdang.
Water Sci Technol. 2002;46(9):331-8.
A laboratory study was conducted on an Extended Aeration-Microfiltration (EAM) reactor in treating a food industry wastewater. The reactor contained horizontally laid hollow fibre microfiltration (MF) units that were fully submerged. The MF units were connected to a peristaltic pump that was used to extract permeate continuously under suction pressure. Continuous aeration from beneath the modules provided the crossflow effect to the MF units. Active activated sludge was used in the start-up where the sludge was mixed together with the feed water at a Food/Microorganisms (F/M) value of about 0.1. Primary effluent with Chemical Oxygen Demand (COD) values ranged between 1,500 and 3,000 mg/l was used as feed water. The EAM reactor was operated for nearly three months without initiating cleaning of the MF units. A suction pressure of 0.9 bar and Mixed Liquor Suspended Solids (MLSS) of over 5,500 mg/l were reached when nearing the end of the three month operation period. Permeate COD and turbidity reduction of over 97% and 99% respectively, were achieved. Prior to this, the MF module arrangements were studied; where vertically arranged modules were found to perform poorly as compared to the horizontally laid modules, in terms of clean water permeate flux.
对一个延时曝气-微滤（EAM）反应器处理食品工业废水进行了实验室研究。该反应器包含水平放置的完全浸没式中空纤维微滤（MF）单元。MF单元连接到一个蠕动泵，该蠕动泵用于在抽吸压力下连续抽取渗透液。从模块下方进行连续曝气为MF单元提供错流效应。启动时使用活性活性污泥，污泥与进水以约0.1的食物/微生物（F/M）值混合。化学需氧量（COD）值在1500至3000mg/l之间的一次出水用作进水。EAM反应器运行了近三个月，未对MF单元进行清洗。在三个月运行期接近尾声时，达到了0.9巴的抽吸压力和超过5500mg/l的混合液悬浮固体（MLSS）。分别实现了超过97%和99%的渗透液COD和浊度降低。在此之前，对MF模块布置进行了研究；发现垂直排列的模块与水平放置的模块相比，在清水渗透通量方面表现较差。
