Water pollution from the discharge of wastewater containing toxic heavy metals such as cadmium (Cd) to the natural water bodies is one of the biggest problem affecting humanity. Different technologies such as sorption, membrane filtration etc. have been used to remove heavy metal from the polluted water. In this work, the effects of operational parameters on the ability of the submerged membrane adsorption hybrid system (SMAHS) to remove Cd²⁺ from synthetic wastewater using dried Aphanothece sp A15 as a suspended biosorbent was evaluated. This biomass originates from a cyanobacterium was cultivated in a photobioreactor system enriched with 15 % of CO₂. The operational parameters investigated were filtration flux, biomass dosage, frequency of replacing biosorbent, and initial metal concentration. Of the various parameters, the filtration flux and the initial concentration of Cd were the most influential parameters concerning biosorption efficiency in this study. More than 95 % removal of Cd was achieved with initial Cd concentration of 4.89 mg/L at a filtration flux of 20 L/m².h. The highest biosorption capacity (112.89 mg/g) was obtained with a flux of 60 L/m².h.The biosorbent became saturated after 20 h of operation without biosorbent replacement. This suggests that the dried biomass of Aphanothece sp A15 has the potential to be implemented in the industrial wastewater treatment plant using SMAHS processes integrated within the CO₂ bio-sequestration unit. Therefore, cadmium removal from wastewater can be coupled with the reduction of CO₂ emissions from flue gas.

从含有镉（Cd）等有毒重金属的废水排放到自然水体的水污染是影响人类的最大问题之一。已经使用了诸如吸附，膜过滤等不同技术来从污水中去除重金属。在这项工作中，使用干燥的Aphanothece sp A15作为悬浮生物吸附剂，评估了操作参数对浸没膜吸附混合系统（SMAHS）从合成废水中去除Cd ²⁺的能力的影响。这种源自蓝藻的生物质在富含15％CO ₂的光生物反应器系统中培养。研究的操作参数为过滤通量，生物量，更换生物吸附剂的频率和初始金属浓度。在各种参数中，过滤通量和Cd的初始浓度是与本研究中生物吸附效率有关的最有影响的参数。在20 L / m ² .h的过滤通量下，初始Cd浓度为4.89 mg / L时，可去除95％以上的Cd 。在60 L / m ² .h的通量下获得了最高的生物吸附容量（112.89 mg / g）。生物吸附剂在运行20小时后变得饱和，无需更换生物吸附剂。这表明Aphanothece sp。的干燥生物量A15有望使用集成在CO ₂生物隔离装置内的SMAHS工艺在工业废水处理厂中实施。因此，从废水中去除镉可与减少烟道气中的CO ₂排放量相结合。