اثر تغییر بستر و بار سطحی فیلترهای شنی تحت فشار بر بهبود حذف پارامترهای کیفی آب تصفیه-خانه‌ معلم‌کلا ساری

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران.

2 کارشناس اداره مطالعات و بررسی‏های فنی آبفا خوزستان، اهواز، ایران.

3 گروه مهندسی آبیاری و آبادانی، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران

چکیده

کمبود آب برای انسان و محیط زیست از مشکلات جدی دنیای امروز به‌حساب می‌آید. آب آشامیدنی شهر ساری و روستاهای وابسته به ‌آن از آب‌های زیرزمینی تامین می‌شود. کیفیت نامطلوب آب‌ خروجی بعد از فیلترهای ‌شنی ‌تحت فشار در تصفیه‌خانه معلم­کلا ساری، باعث شد که در این پژوهش به بررسی عوامل موثر بر کارایی فیلترهای مذکور پرداخته شود. بستر فیلترهای شنی تحت فشار مزبور تنها از سه نوع دانه‌بندی سیلیس تشکیل شده است. در این پژوهش با انتخاب نوع دانه‌بندی و استفاده از بستر تک لایه و دولایه در بستر فیلترهای شنی تحت فشار (سیلیس، سیلیس-آنتراسیت و لیکا-آنتراسیت) همین‌طور با تغییر بار سطحی آن‌ها در هفت مرحله به بررسی پارامترهای فیزیکی و شیمیایی مرتبط با فیلترهای شنی تحت‌فشار پرداخته شد. در تمامی مراحل در پنج نقطه از تصفیه‌خانه (نمونه‌گیری از آب خام، بعد از هوادهی، در ابتدای کارکرد فیلتر، در انتهای کارکرد فیلتر و بعد از کلرزنی) نمونه‌برداری صورت گرفت. نتایج نشان داد که بهترین گزینه، استفاده هم‌زمان از سیلیس و آنتراسیت در بستر فیلترها با 5/1 برابر بار سطحی به‌کار گرفته شده در تصفیه‌خانه به‌همراه استفاده از واحد هوادهی و ته‌نشینی است. راندمان حذف پارامترهای کدورت، TDS، TSS، کلسیم، منیزیم و آهن به­ترتیب برابر 41/85%، 54/23%، 94/56%، 08/21%، 28/32% و 47/89% به‏دست آمد. بنابراین استفاده از بستر دولایه سیلیس و آنتراسیت باعث افزایش کیفیت آب خواهد شد و قابل توصیه برای مناطق دارای کدورت بالا می­باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The Effect of Substrate and Surface Load Change of Pressurized Sand Filters on Removal Improvement of Water Quality Parameters in Moallemkola-Sari Water Treatment Plant

نویسندگان [English]

  • sima dadashzadeh 1
  • Mojtab Khoshravesh 1
  • Mohammad Gholami 2
  • Masoud Pourgholam Amiji 3
1 Water Engineering Department, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
2 Expert of the Office of Studies and Technical Research. Rural Water and Wastewater Company of Khoozestan, Ahvaz, Iran.
3 Department of Irrigation and Reclamation Engineering, Faculty of Agriculture Engineering & Technology, College of Agriculture and Natural Resources, University of Tehran
چکیده [English]

The lack of water for humans and the environment is one of the serious problems of today's world. Drinking water in Sari city and its dependent villages are provided with groundwater. The poor quality of the outlet water after the pressurized sand filters in the Moallemkola water treatment plant led to investigate the effective factors on the efficiency of the above filters. The pressurized sand filters substrate was composed of three types of silica granulation. This research investigated the physical and chemical parameters of pressurized sand filters by choosing the type of granulation and the use of a single layer and double layer in the pressurized sand filters bed (silica, silica-anthracite, and leca-anthracite), as well as changing their surface load in seven steps. Samples were taken in all steps and from five points in the water treatment plant (inlet water, after aeration, at the beginning of the filter operation, at the end of filter function and after chlorination). The results showed that the best option is the simultaneous use of silica and anthracite in the filter bed, employing 1.5 times of surface load in the water treatment plant, along with the use of aeration and sedimentation units. The removal efficiency of turbidity, TDS, TSS, calcium, magnesium and iron parameters was obtained 85.41, 23.54, 56.94, 21.08, 32.28 and 89.47%, respectively. Therefore, the use of double layer of silica and anthracite will increase the quality of water, and it is recommended for areas with high turbidity.

کلیدواژه‌ها [English]

  • Turbidity
  • Anthracite
  • Calcium
  • Water Refinery
  • TDS and TSS
Asghari, F. B., Mohammadi, A. A., Dehghani, M. H., & Yousefi, M. (2018). Data on assessment of groundwater quality with application of ArcGIS in Zanjan, Iran. Data in brief, 18, 375.

Ashraf, S. N., Rajapakse, J., Dawes, L. A., & Millar, G. J. (2018). Coagulants for removal of turbidity and dissolved species from coal seam gas associated water. Journal of water process engineering, 26, 187-199.

Baraee, I., Borghei, S. M., Takdastan, A., Hasani, A. H. & Javid, A. H. (2016). Evaluate the performance of dual media filter to improve water quality in Abadan water refinery. The Journal of Toloo-e-behdasht, 15 (3), 130-143. (In Farsi)

Delbazi, N., Ahmadi Moghadam, M., Takdastan, A. & Jaafarzade haghighi fard, N. (2014). Comparation of mono layer filter (sand) dual media filter (anthracite and leca) and performance in removal of organic matter and turbidity. Journal of Health and Environment, 4(3), 301-312. (In Farsi)

Eisazadeh, H. and A. Mahdavi. (2004). The Effect of activated carbon on Bandar Abbas drinking water quality. The First National Civil Engineering Congress, 13 May, Sharif University of Technology (in Farsi)

Emelko, M. B. (2003). Removal of viable and inactivated Cryptosporidium by dual-and tri-media filtration. Water research, 37(12), 2998-3008.

Flores-Alsina, X., Feldman, H., Monje, V. T., Ramin, P., Kjellberg, K., Jeppsson, U., Batstone, D. J. & Gernaey, K. V. (2019). Evaluation of anaerobic digestion post-treatment options using an integrated model-based approach. Water Research. 156, 264-276.

Fourozesh, M. (2018). Processes of water purification (membrane processes and filtration). 170 p. (In Farsi)

Ghahremani, A., Maleki, A., Abuei-Mehrizi, A. & Taghavi, M. (2012). Evaluation of iron concentrations in drinking water resources in villages in sari. 15th National Conference on Environmental Health, Guilan University of Medical Sciences, Rasht. (In Farsi)

Gholami, M., Kashkoli, H. & Shafaei Bajestan, M. (2010). Effective factors on the use of pressure-filtered sand filters in drinking water refinery’s in villages of Ahvaz. 4th Environmental Engineering Conference, University of Tehran, Faculty of Environment. (In Farsi)

Kim, S. J., Park, J. Y., Lee, Y. W., Hwang, K. W., & Lee, W. K. (2007). Seed crystallization with cavitation for enhanced removal of calcium in water. Journal of Industrial and Engineering Chemistry, 13(1), 79-83.

Memarzadeh, M., Najafi, P. & Afuni, M. (2010). Efficiency of garnet mineral used in three-layer filters to remove turbidity and biological organisms in Isfahan water treatment plant. Journal of Water and Wastewater, 89(1), 76-83. (In Farsi)

Merganpour, A. M., Nekuonam, G., Alipour Tomaj, O., Kor, Y., Safari, H., Karimi, K., & Kheirabadi, V. (2015). Efficiency of lead removal from drinking water using cationic resin Purolite. Environmental Health Engineering and Management Journal, 2(1), 41-45.

Osloub, M. & Kazemi, K. (2015). Investigation of the effect of using pressure-sensitive sandy iron to remove manganese iron and turbidity from drinking water in Tonekabon Lashkarak village. 3th International Conference on Sustainable Development, Solutions and Challenges Focusing on Agriculture, Natural Resources and Tourism. Tabriz. (In Farsi)

Rezaei, M., Parastar, S., Rahmani, Z., Vosoghi, M. & Pooreshgh, Y. (2014). Evaluation of water treatment plant performance of Parsabad city in Ardabil province in removal of total dissolved solids, turbidity phosphate and calcium. Journal of Environmental Health Engineering, 1(2), 75-83. (In Farsi)

Schweiker, M. (2001). Drinking water treatment technologies for groundwater systems under the direct influence of surface water. Commonwealth of Pennsylvania, Department of Environmental Protection.

Shadman, M. M. and S. Ahmadi. (2016). Optimization the operation of reverse washing of sand filters by concentration profiles during washing time. Oil research, 87, 167-176. (In Farsi)

Sohrabi, K. (2012). Investigation of removal of iron and manganese from underground waters of Mazandaran province using modern methods. MS.c dissertation, University of Water and Power Industry (Shahid Abbaspour). Faculty of Environment. (In Farsi)

Tajbakhshian, M., Mahmudy Gharaie, M. h., Mahboubi, A., Mussavi Harami, R. & Ejlali, I. (2018). Qualitative assessment of wastewater of shahid hashemi nezhad gas refinery and adjacent water resources for agricultural use. Iranian Journal of irrigation & drainage, 12(4), 903-918. (In Farsi)

Thompson, N. E., Onyebuchi, N. J., Theophilus, A., Jerry, U., & Chizoba, A. (2018). Laboratory Studies on the Treatment of Effluent from a Pulp and Paper Mill Using Activated Carbon and Sand Filter Media. American Chemical Science Journal, 12(1), 1-14.