Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Xanthi, Greece.
Laboratory of Ecological Engineering and Technology, Department of Civil Engineering, Democritus University of Thrace, Xanthi, Greece.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2022;57(9):764-772. doi: 10.1080/10934529.2022.2110478. Epub 2022 Aug 10.
Landfill leachate, due to its recalcitrant nature and toxicity, poses a serious environmental threat, which requires the implementation of effective treatment processes. In this work, a full-scale treatment system consisting of two Sequencing Batch Reactors (SBRs) was used for the processing of landfill leachate of intermediate to mature age (BOD/COD ratio of 0.16). Biosystem operation resulted in BOD, COD and TKN removal efficiencies of 81%, 39% and 76%, respectively, whereas the low residual NO-N concentration in the effluent (4.01 ± 0.10 mg/L) was indicative of the efficient denitrification process. Assessment of hydrolytic potential of activated sludge revealed high endocellular and extracellular lipase activities, which reached values up to 206 and 141 U/g protein respectively, possibly as the consequence of plastics degradation during maturation process. Implementation of Illumina sequencing indicated the predominance of , accompanied by members of , and . was the predominant genus identified, followed by representatives of the genera , , and . was the major ammonia-oxidizing bacterium (AOB), while nitrite oxidation was mainly achieved by the uncultured nitrite-oxidizing bacterium (NOB) Nitrotoga.
垃圾渗滤液由于其难降解性和毒性，对环境构成了严重威胁，因此需要采用有效的处理工艺。在这项工作中，使用了由两个序批式反应器（SBR）组成的全规模处理系统来处理中龄至老龄（BOD/COD 比为 0.16）的垃圾渗滤液。生物系统的运行使 BOD、COD 和 TKN 的去除效率分别达到 81%、39%和 76%，而低浓度的残留 NO-N（4.01 ± 0.10 mg/L）表明反硝化过程高效。对活性污泥水解潜力的评估显示出高的胞内和胞外脂肪酶活性，分别达到 206 和 141 U/g 蛋白质，这可能是由于在成熟过程中塑料的降解。Illumina 测序的实施表明， 占主导地位，其次是 、 和 。 是鉴定出的主要属，其次是属 、 、 和 。 是主要的氨氧化细菌（AOB），而亚硝酸盐氧化主要由未培养的亚硝酸盐氧化细菌（NOB） 完成。
