Monitoring of the gas and leachate parameters in a closed landfill is a long-term activity defined by national legislative worldwide. Serbian Waste Disposal Law defines the monitoring of a landfill at least 30 years after its closing, but the definition of the monitoring extent (number and type of parameters) is incomplete. In order to define and clear all the uncertainties, this research focuses on process of monitoring optimization, using the closed landfill in Zrenjanin, Serbia, as the experimental model.

The aim of optimization was to find representative parameters which would define the physical, chemical and biological processes in the closed methanogenic landfill and to make this process less expensive. Research included development of the five monitoring models with different number of gas and leachate parameters and each model has been processed in open source software GeoGebra which is often used for solving optimization problems. The results of optimization process identified the most favorable monitoring model which fulfills all the defined criteria not only from the point of view of mathematical analyses, but also from the point of view of environment protection. The final outcome of this research - the minimal required parameters which should be included in the landfill monitoring are precisely defined.

监测封闭的垃圾填埋场中的气体和渗滤液参数是一项长期的活动，由世界范围内的国家立法机构定义。塞尔维亚废物处置法对填埋场关闭后至少30年进行了监测，但监测范围（参数的数量和类型）的定义不完整。为了定义和清除所有不确定性，本研究着重于监测优化的过程，以塞尔维亚Zrenjanin的封闭垃圾填埋场为实验模型。

优化的目的是找到代表性参数，这些参数将定义封闭的产甲烷垃圾填埋场的物理，化学和生物过程，并降低该过程的成本。研究包括开发具有不同数量的气体和渗滤液参数的五个监测模型，每个模型都在开源软件GeoGebra中进行了处理，该软件通常用于解决优化问题。优化过程的结果确定了最有利的监控模型，该模型不仅从数学分析的角度来看，而且从环境保护的角度来看，都满足所有定义的标准。这项研究的最终结果-准确定义了垃圾填埋场监测中应包括的最低要求参数。