State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China.
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China.
Chemosphere. 2021 Feb;265:129170. doi: 10.1016/j.chemosphere.2020.129170. Epub 2020 Dec 1.
Aerobic granular sludge (AGS) technology has been recognized as a promising alternative to alleviate the osmotic stress of hypersaline wastewater. However, the response of AGS process to composite hypersaline wastewater on removal performance and populations was yet to be understood. In this work, two sequenced batch reactors were operated in parallel in absence (R0) and presence (R1) of high concentration sulfate as proxy for single and mixed salts (30 g salt·L) respectively. Results demonstrated that the presence of sulfate in hypersaline wastewater enhanced chemical oxygen demand (COD) and total nitrogen (TN) removals of 95.3% and 65.5% respectively with lower accumulations of nitrite. High-throughput 16 S rRNA gene sequencing technique elucidated that Denitromonas (31.6%) and Xanthomarina (17.0%) were the more dominant genera in AGS response to mixed salts with high sulfate and laid the biological basis for strengthening removal performance. The enrichment of halophilic Luteococcus (23.5%) in the AGS surface indicated the potential role of mixed salts in shaping the physical properties and surface population structure of AGS. Our work could facilitate the potential applications of AGS technology for industrial hypersaline wastewater treatment with complicated compositions.
好氧颗粒污泥（AGS）技术已被认为是缓解高盐废水渗透压力的一种很有前途的替代方法。然而，AGS 工艺对复合高盐废水的去除性能和种群的响应尚不清楚。在这项工作中，两个序批式反应器在不存在（R0）和存在（R1）高浓度硫酸盐的情况下平行运行，分别模拟单一和混合盐（30g 盐·L）。结果表明，高盐废水中硫酸盐的存在分别提高了化学需氧量（COD）和总氮（TN）的去除率，分别为 95.3%和 65.5%，同时亚硝酸盐的积累较低。高通量 16S rRNA 基因测序技术表明，在混合盐（高硫酸盐）作用下，AGS 中优势属为脱氮单胞菌（31.6%）和黄单胞菌（17.0%），为强化去除性能提供了生物学基础。AGS 表面富营养化的嗜盐短杆菌（23.5%）表明，混合盐在塑造 AGS 的物理性质和表面种群结构方面具有潜在作用。我们的工作可以促进 AGS 技术在处理具有复杂成分的工业高盐废水方面的潜在应用。
