Chemical Oxygen Demand abatement in sewage using Micro-Aeration Enhanced Ecological Floating Bed

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Shi, Hongle^1 ; Zhou, Gaofeng^1 ; Liu, Yiqing^1 ; Tan, Jiancong^1 ; Fu, Yongsheng^1

Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu

611756, China^1

关键词: Aeration intensity;    Different operating conditions;    Ecological floating beds;    Purification efficiency;    Reaction conditions;    Removal efficiencies;    Removal rate of cods;    Treatment efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012029/pdf
DOI  :  10.1088/1755-1315/113/1/012029

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The traditional ecological floating bed combined with micro-aeration system and artificial medium was developed for the removal of contaminants and remediation of surface water. This micro-aeration enhanced ecological floating bed (MAEEFB) consisted of aeration unit, microbial processing unit and aquatic plant unit. Batch experiments were conducted in different operating conditions on the removal of chemical oxygen demand (COD) in the sewage using MAEEFB. The removal rate of COD by MAEEFB, enhanced ecological floating bed (EEFB) and traditional ecological floating bed (TEFB) in the same reaction conditions was 59.2%, 56.9% and 30.6%, respectively, indicating that the combination of micro-aeration system and artificial medium could enhance the removal efficiency of COD in TEFB. In MAEEFB, the aeration intensity should be designed reasonablely considering both treatment efficiency and operation cost. Only increasing the specific surface area of the packing cannot effectively improve the purification efficiency of water. Factors like packing material, ability of intercepting organics and complicated extent of microorganisms attaching on the packing should also be considered.