تخصیص بهینه بار یک/چند آلاینده در رودخانه قشلاق؛ رویکرد شبیه‎سازی- بهینه‎سازی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش‎آموخته کارشناسی ارشد /مهندسی عمران- محیط‎زیست، دانشکده محیط‎زیست، کرج، البرز، ایران.

2 استادیار/ عضو هیات علمی گروه آب و محیط‎زیست، دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران، تهران، ایران

3 استادیار/ عضو هیات علمی دانشکده فنی و مهندسی، گروه مهندسی عمران، دانشگاه خوارزمی، کرج، البرز، ایران

چکیده

در این کار تحقیقاتی مساله تخصیص بهینه بار یک و/یا چند آلاینده در امتداد رودخانه قشلاق با استفاده از مدل شبیه‎سازی QUAL2Kw و الگوریتم بهینه‎سازی چندهدفه هوش جمعی ذرات مورد بررسی قرار گرفته‎است. اهداف تعریف شده در مساله تخصیص بهینه بار آلودگی CBOD، بهبود کیفیت آب رودخانه قشلاق (مینیمم نمودن میزان تخطی غلظت اکسیژن محلول نسبت به مقدار استاندارد در نقاط متعدد پایش) و مینیمم نمودن هزینه‎های احداث و بهره‎برداری از واحدهای تصفیه‎خانه صنعتی و شهری امتداد رودخانه است. همچنین در مساله تخصیص بهینه بار چند آلودگی، بهبود شاخص کیفیت آبی که تجمیع اثر پارامترهای کیفی متعدد (مجموع کلیفرم، غلظت نیتروژن، غلظت فسفر، ذرات معلق و اکسیژن محلول) در نقاط پایش را لحاظ می‎نماید به عنوان تابع هدف کیفیت آب، تعریف گردید. نتایج نشان می‎دهند در مساله تخصیص بار CBOD، در صورت عدم تصفیه مجموع قدر مطلق تخطی اکسیژن محلول از مقدار استاندارد در نقاط پایش 5/4 میلی گرم بر لیتر و در صورت عدم تخطی از استاندارد، مجموع هزینه احداث و بهره برداری از تصفیه خانه‎ها در مدت 25 سال حدود 290 میلیارد ریال خواهد بود. همچنین در مساله تخصیص بهینه بار چند آلاینده، هزینه‎های تصفیه‎خانه‎ها افزایش قابل توجهی نسبت به مساله تخصیص بار یک آلاینده می‎یابد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Single/Multi Waste Load Allocation in Gheshlagh River; Simulation-Optimization Approach

نویسندگان [English]

  • H Khoshkam 1
  • M Saadatpour 2
  • N Heidarzadeh 3
1 M. Sc. Graduated Student of Civil and Environmental Engineering, College of Environment, Karaj, Alborz, Iran
2 Assistant Professor, School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran. msaadatpour@iust.ac.ir
3 Assistant Professor, Civil Engineering Department, Technical Faculty, Kharazmi University, Karaj, Alborz, Iran. n.heidarzadeh@khu.ac.ir
چکیده [English]

In this research, single/multi waste load allocation problems are considered with QUAL2Kw and multi objective particle swarm optimization (MOPSO) algorithm tools. Improving water quality in Gheshlagh river (minimization of DO violation from standard value) and minimization of construction and operation costs of municipal and industrial wastewater treatment plants are defined as objective functions in CBOD waste load allocation problem. Improving the integrated water quality index (the index integrates the effects of T. Coliform, nitrogen concentration, phosphorous concentration, total suspended solid, and dissolved oxygen) in various monitoring stations is defined as water quality objective in multi waste load allocation problem. The results show that in CBOD waste load allocation problem without any water treatment plant, the sum of DO violation in various monitoring stations is 4.5 mg/L. Also no water quality standard violations occurs when the construction and operation cost of wastewater treatment plant is 290 ×109 Rials in 25 years. In multi waste load allocation problem the wastewater treatment plant costs increase considerably more than single waste load allocation problem.

کلیدواژه‌ها [English]

  • Multi-Objective Particle Swarm Optimization Algorithm
  • Optimum Waste Load Allocation
  • QUAL2Kw Model
  • Water Quality Index
  • Gheshlagh River

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