Turbidity and Some Heavy Metals Removal Efficacy by Poly Aluminium Chloride (PAC) Coagulant in the Presence of Bentonite and Polyelectrolyte Coagulant Aid (Case Study: Isfahan Babashikhali Water Treatment Plant)

Document Type : Research Paper

Author

Tehran Water and Waste water Company. Water and Wastewater Quality Monitoring and Supervision Center , Quality Control Expert

Abstract

One of the important steps in the process of removing water turbidity is the use of coagulants. Amongst the most applied materials is poly aluminum chloride (PAC) which is used to precipitate colloidal particles. The use of this compound, which contains Aluminum, in the coagulation causes some residual aluminum in the water. Natural and synthetic coagulants aid can be used to reduce the effects of overuse of poly aluminum chloride. In this study, the effect of bentonite and polyelectrolyte coagulant aid in the turbidity removal process of Babasheikhali water treatment plant is investigated. The results showed that optimum pH for turbidity removal was 8 and the optimal concentration of poly aluminum chloride at the optimum pH was 10 mg/L. In the presence of bentonite, the optimal PAC concentration decreased to 4mg/L and the turbidity removal efficiency increased to 92%. The results also showed that the combination of PAC and polyelectrolyte together can be used to reduce the concentration of heavy metals in the incoming water. Therefore, bentonite and polyelectrolyte coagulants aid can be used as a suitable option along with poly aluminum chloride to remove turbidity from the water treatment plant.

Keywords

بینا، ب.، شاهسونی، ع.، عسگری، غ.، و حسن زاده، ع.، (1386)، "مقایسه کارایی عصاره دانه مورینگا اولیفرا و پلی‌آلومینیوم‌کلراید در حذف کدورت آب"،  مجله آب و فاضلاب، 18(1)، 24-33.

ترابیان، ع.، و شاهوی، ش.، (1396)، "بررسی و مقایسه استانداردهای کیفی آب شرب ایران و استانداردهای معتبر جهانی"، نشریه علوم و مهندسی آب و فاضلاب ایران، 2(2) ، 3-13.

شایسته، ک.، کوهی، ب.، حسنوند، ح.، و یاری، و.، (1391)، "بررسی تأثیر پارامترهای موثر بر فرآیند انعقاد"، چهاردهمین کنگره ملی مهندسی شیمی ایران، تهران، ایران.

عروجی، ن.، تکدستان، ا.، کارگری، ع.، و رئیسی، غ.، (1391)، "کارایی کیتوزان به همراه پلی‎آلومینیوم‎کلراید در حذف کدورت از آب ورودی به تصفیه‎خانه اهواز"، مجله آب و فاضلاب، 23(4)، 77-70.

Asrafuzzaman, M.D., Fakhruddin, A.N.M., and Alamgir, H., (2011), “Reduction of turbidity of water using locally available natural coagulants”, International Scholarly Research Network, Vol. 2011, Article ID. 632189, 6.

Daryabeigi Zand, A., and Hoveidi, H., (2015), “Comparing Aluminium Sulfate and Poly-Aluminium Chloride (PAC) performance in turbidity removal from synthetic water”, Journal of Applied Biotechnology Reports, 2(3), 287-292.

Kaggwa, R.C., Mulalelo, C.I., Denny, P., and Okurut, T.O., (2001), “The impact of alum discharges on a natural tropical wetland in Uganda”, Water Research, 35(3), 795-807.

Kawamura, S., (1991), “Effectiveness of natural polyelectrolytes in water treatment”, Journal of the American Water Works Association, 83(10), 88-91.

Mehdinejad, M.H., Alimohammadi, N., Arbabmojeni, N., Soltani, A., and Amanbaei, A., (1393), “Residual Aluminum from application of Alum and Polyaluminum Chloride in removal of turbidity from turbid water”, Journal of Gorgan University of Medical Sciences, 16(11), 82-88.

Sanghi, R., Bhattacharya, B., Dixit, A., and Singh, V., (2006), “Ipomoea dasysperma seed gum: An effective natural coagulant for the decolorization of textile dye solutions”, Journal of Environmental Management, 81(1), 36-41.

Shen, Y.H., (2005), “Treatment of low turbidity water by sweep coagulation using bentonite”, Journal of Chemical Technology and Biotechnology: International Research in Process, Environmental and Clean Technology, 80(5), 581-586.

Takdastan, A., Jaafarzadeh, N., Hormozi Nejad, M., and AhmadiMoghadam, M., (2012), “Comparison of lime and bentonite efficiency in orthophosphate removal from influent of secondary clarifier in west wastewater treatment plant of Ahvaz”, Journal of Health, 4(1), 68-76.

Wu, Z., Zhang, X., Pang, J., Li, J., Li, J., and Zhang, P., (2020), “High-poly-aluminum chloride sulfate coagulants and their coagulation performances for removal of humic acid”, Royal Society of Chemistry Advances, 12(10), 7155-7162.

References

بینا، ب.، شاهسونی، ع.، عسگری، غ.، و حسن زاده، ع.، (1386)، "مقایسه کارایی عصاره دانه مورینگا اولیفرا و پلی‌آلومینیوم‌کلراید در حذف کدورت آب"،  مجله آب و فاضلاب، 18(1)، 24-33.
ترابیان، ع.، و شاهوی، ش.، (1396)، "بررسی و مقایسه استانداردهای کیفی آب شرب ایران و استانداردهای معتبر جهانی"، نشریه علوم و مهندسی آب و فاضلاب ایران، 2(2) ، 3-13.
شایسته، ک.، کوهی، ب.، حسنوند، ح.، و یاری، و.، (1391)، "بررسی تأثیر پارامترهای موثر بر فرآیند انعقاد"، چهاردهمین کنگره ملی مهندسی شیمی ایران، تهران، ایران.
عروجی، ن.، تکدستان، ا.، کارگری، ع.، و رئیسی، غ.، (1391)، "کارایی کیتوزان به همراه پلی‎آلومینیوم‎کلراید در حذف کدورت از آب ورودی به تصفیه‎خانه اهواز"، مجله آب و فاضلاب، 23(4)، 77-70.
Asrafuzzaman, M.D., Fakhruddin, A.N.M., and Alamgir, H., (2011), “Reduction of turbidity of water using locally available natural coagulants”, International Scholarly Research Network, Vol. 2011, Article ID. 632189, 6.
Daryabeigi Zand, A., and Hoveidi, H., (2015), “Comparing Aluminium Sulfate and Poly-Aluminium Chloride (PAC) performance in turbidity removal from synthetic water”, Journal of Applied Biotechnology Reports, 2(3), 287-292.
Kaggwa, R.C., Mulalelo, C.I., Denny, P., and Okurut, T.O., (2001), “The impact of alum discharges on a natural tropical wetland in Uganda”, Water Research, 35(3), 795-807.
Kawamura, S., (1991), “Effectiveness of natural polyelectrolytes in water treatment”, Journal of the American Water Works Association, 83(10), 88-91.
Mehdinejad, M.H., Alimohammadi, N., Arbabmojeni, N., Soltani, A., and Amanbaei, A., (1393), “Residual Aluminum from application of Alum and Polyaluminum Chloride in removal of turbidity from turbid water”, Journal of Gorgan University of Medical Sciences, 16(11), 82-88.
Sanghi, R., Bhattacharya, B., Dixit, A., and Singh, V., (2006), “Ipomoea dasysperma seed gum: An effective natural coagulant for the decolorization of textile dye solutions”, Journal of Environmental Management, 81(1), 36-41.
Shen, Y.H., (2005), “Treatment of low turbidity water by sweep coagulation using bentonite”, Journal of Chemical Technology and Biotechnology: International Research in Process, Environmental and Clean Technology, 80(5), 581-586.
Takdastan, A., Jaafarzadeh, N., Hormozi Nejad, M., and AhmadiMoghadam, M., (2012), “Comparison of lime and bentonite efficiency in orthophosphate removal from influent of secondary clarifier in west wastewater treatment plant of Ahvaz”, Journal of Health, 4(1), 68-76.
Wu, Z., Zhang, X., Pang, J., Li, J., Li, J., and Zhang, P., (2020), “High-poly-aluminum chloride sulfate coagulants and their coagulation performances for removal of humic acid”, Royal Society of Chemistry Advances, 12(10), 7155-7162.
Journal of Water and Wastewater Science and Engineering
Volume 6, Issue 4
January 2022
Pages 23-31

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History

  • Receive Date: 22 February 2021
  • Revise Date: 28 April 2021
  • Accept Date: 14 June 2021

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