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Optimal Selection of wastewater treatment process and location for subway stations using mathematical techniques

机译：利用数学技术对地铁站废水处理工艺及位置的优化选择

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Background and objectives: There are several methods to choose the optimum method and position of wastewater treatment facilities as two separate tasks. However, making these two decisions at the same time is a function of several parameters. MCDM technique is one of the best options when controversial criteria need to be taken into account. Moreover, when several controversial objectives need to be taken into account, multi-objective decision making method (MODM) is an option and the best answer is determined using mathematic programming methods. The present paper is an attempt to find an optimum location for wastewater facilities and an optimum wastewater treatment system for subway stations using mathematical techniques in Lingo software. Methodology: The study was carried out as a quantitative applied study in the five stations of east-end of Tehran Subway Line 2. The model to follow several minimizing objectives was defined using linear binary programming. In terms of constraints of the study, financial constraint, spatial constraint, and capacity constraint are notable. Findings: Five scenarios were defined to choose the location and method of wastewater treatment optimally. Given the objective function and the constraints, the scenario 1 (collecting all wastewaters in Sarsabz station and pumping to the urban ego system) was adopted as the optimum scenario. Conclusion: The study showed that finding the optimum method and location of a wastewater treatment system is a big challenge and the decision making method adopted here was capable of yielding the best scenario given the objective function and the constraints.
机译：背景和目标：有几种方法可以选择最佳方法和废水处理设施的位置作为两个单独的任务。但是，同时做出这两个决定是几个参数的函数。当需要考虑有争议的标准时，MCDM技术是最好的选择之一。此外，当需要考虑几个有争议的目标时，可以选择多目标决策方法（MODM），并使用数学编程方法确定最佳答案。本文尝试使用Lingo软件中的数学技术找到废水处理设施的最佳位置和地铁站的最佳废水处理系统。方法：该研究是作为定量应用研究在德黑兰地铁2号线东端的五个站点进行的。使用线性二进制编程定义了遵循多个最小目标的模型。就研究的约束而言，财务约束，空间约束和容量约束是值得注意的。结果：定义了五个方案，以最佳选择废水处理的位置和方法。考虑到目标功能和约束条件，采用方案1（收集Sarsabz站的所有废水并泵入城市自我系统）作为最佳方案。结论：研究表明，寻找废水处理系统的最佳方法和位置是一个巨大的挑战，并且在目标函数和约束条件下，此处采用的决策方法能够提供最佳方案。

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