Malovanyy Myroslav, Zhuk Volodymyr, Tymchuk Ivan, Zavoyko Bohdan, Grechanik Ruslan, Sliusar Vira, Vronska Nataliya, Marakhovska Anastasiya, Sereda Andriy
Lviv Polytechnic National University, Viacheslav Chornovil Institute of Sustainable Development, S. Bandera Str. 12, Lviv, 79013, Ukraine.
Lviv Polytechnic National University, Institute of Civil Engineering and Building Systems, S. Bandera Str. 12, Lviv, 79013, Ukraine.
Heliyon. 2023 May 25;9(6):e16695. doi: 10.1016/j.heliyon.2023.e16695. eCollection 2023 Jun.
Landfill leachates contain highly concentrated pollutants, and their uncontrolled discharge poses significant risks to the public health and environment. This study validated a pilot-scale two-stage aerobic biochemical and reagent method for the pre-treatment of moderately old landfill leachate at a pilot-scale treatment plant with a capacity of 400 L per day. The kinetic curves of key pollutants were described using two-factor dimensionless exponential equations, allowing for predicting maximally achievable treatment effects during the first aerobic biochemical stage. The optimal duration of aerobic biochemical pre-treatment was determined based on the concept of limiting pollutant content and minimizing operating costs for the two-stage process. Reagent-based leachate pre-treatment using the modified Fenton method was verified in a batch reactor. Optimal concentrations and dosages of reagent solutions, including polyacrylamide, aluminium sulphate, ferrous sulphate, and hydrogen peroxide, were found to comply with Ukrainian regulations for wastewater discharge into sewerage networks. Key pollution indicators of pre-treated leachate, such as NH-N (13.4-15.5 mg × L), TKN (25.7-30.2 mg × L), BOD (71.8-76.9 mg × L), and COD (390-459 mg × L), meet the required standards.
垃圾渗滤液含有高浓度污染物，其未经控制的排放对公众健康和环境构成重大风险。本研究在一座日处理能力为400升的中试规模处理厂，验证了一种用于预处理中度陈化垃圾渗滤液的中试规模两段式好氧生化和试剂法。使用双因素无量纲指数方程描述关键污染物的动力学曲线，从而能够预测第一个好氧生化阶段可实现的最大处理效果。基于限制污染物含量和使两阶段工艺运营成本最小化的理念，确定了好氧生化预处理的最佳时长。在间歇式反应器中验证了采用改良芬顿法的基于试剂的渗滤液预处理。发现包括聚丙烯酰胺、硫酸铝、硫酸亚铁和过氧化氢在内的试剂溶液的最佳浓度和用量符合乌克兰污水排入排水管网的规定。预处理渗滤液的关键污染指标，如NH-N（13.4 - 15.5毫克/升）、TKN（25.7 - 30.2毫克/升）、BOD（71.8 - 76.9毫克/升）和COD（390 - 459毫克/升），均符合要求标准。
