Kiran Tota-Maharaj 
, Tawari Tota-Maharaj
DOI: 10.15199/17.2025.12.3, GWiTS 12/2025, grudzień 2025
Pobierz w PDF (Open Access)
Abstract:
Small Island Developing States (SIDS) face increasing challenges in providing safe drinking water due to increasing demand, limited access to freshwater, and vulnerability to pollution. This paper presents the design and analysis of a conventional water treatment plant (WTP) designed for the Caribbean region with a capacity to treat and distribute 140,000 cubic meters of drinking water per day. The study describes a systematic approach to water treatment, including screening, coagulation, flocculation, sedimentation, flash filtration, and tertiary disinfection. The performance results show significant reductions in key contaminants such as coliform bacteria, Escherichia coli, turbidity, biochemical oxygen demand (BOD), and chemical oxygen demand (COD), bringing water quality within internationally accepted standards set by the World Health Organisation (WHO) and the United States Environmental Protection Agency (US EPA). The WTP proposal highlights practical engineering solutions to improve water security, protect public health, and ensure environmental sustainability in the Caribbean region.
Keywords: Water Treatment Plant (WTP); Small Island Developing States (SIDS); potable water supply; contaminant removal; water quality standards; Caribbean; sustainable water management.
Streszczenie:
Małe rozwijające się państwa wyspiarskie (SIDS) stoją przed coraz większymi wyzwaniami w zakresie zapewnienia bezpiecznej wody pitnej ze względu na rosnące zapotrzebowanie, ograniczony dostęp do słodkiej wody i podatność na zanieczyszczenia. Niniejszy artykuł przedstawia projekt i analizę konwencjonalnej stacji uzdatniania wody (WTP) zaprojektowanej dla regionu Karaibów, której wydajność wynosi 140 000 m3/d. W badaniu opisano systemowe podejście do uzdatniania wody, obejmujące cedzenie, koagulację, flokulację, sedymentację, filtrację i końcową dezynfekcję. Przedstawione wyniki pokazują znaczne zmniejszenie kluczowych zanieczyszczeń, takich jak bakterie z grupy coli, Escherichia coli, mętność, BZT5 i ChZT, dzięki czemu jakość wody spełnia międzynarodowe wymagania ustanowione przez Światową Organizację Zdrowia (WHO) i Agencję Ochrony Środowiska Stanów Zjednoczonych (US EPA). Przedstawione rozwiązania WTP podkreślają praktyczne podejście inżynieryjne mające na celu poprawę bezpieczeństwa wodnego, ochronę zdrowia publicznego i zapewnienie zrównoważenia środowiskowego w regionie Karaibów.
Słowa kluczowe: stacja uzdatniania wody (WTP), małe rozwijające się państwa wyspiarskie (SIDS), woda przeznaczona do spożycia, usuwanie zanieczyszczeń, standardy odnośnie jakości wody do spożycia, region Karaibów, zrównoważone zarządzanie wodą
[1] Akers, R.J., 1975. Flocculation. The Institution of Chemical Engineers. Available at: https://books.google.co.uk/books/about/Flocculation.html?id=F08AAgAACAAJ&redir_esc=y [Accessed 16 December 2024].
[2] ARM Group Ltd, 2013. Sludge Treatment. [pdf]. Available at: http://www.armreedbeds.co.uk/wp-content/uploads/2013/01/ARM-Sludge-Technology-specific-LR.pdf [Accessed on 26/March/2023].
[3] Bratby, J., 2016. Coagulation and Flocculation in Water and Wastewater Treatment. IWA Publishing. Available at: https://books.google.co.uk/books?hl=en&lr=&id=PabQDAAAQBAJ&oi=fnd&pg=PP1&dq=Bratby%2BJ.%2B%282006%29%2BCoagulation%2Band%2BFlocculation%-2Bin%2BWater%2Band%2Bwastewater%2BTreatment.%2BIWA%2BPublishing%2C%2BLondon%2C%2BSeattle.&ots=t38RKndkxX&sig=K2RHi-bTmRnCMm91BGVYJoKIMe0#v=onepage&q&f=false [Accessed 16 December 2024].
[4] Brodeur, T., 2011. Chlorine Contact Chambers; Chlorine Mixing and Contact Time for Ct.a. [Online] Available at: https://www.slideserve.com/alexandria/chlorine-contact-chambers-identify-operational-and-design-improvements-associated-with-the-disinfection-process-to-help-1324591 [Accessed on 06/March/2023].
[5] Crittenden, J. C., Trussell, R. R., Hand, D. W., Howe, K. J., and Tchobanoglous, G. (2005) Water Treatment Principles and Design, 2nd Edition. New Jersey: John Wiley & Sons, Inc. pg.810 – 817.
[6] Crittenden, J. C., Trussell, R. R., Hand, D. W., Howe, K. J., and Tchobanoglous, G. (2005).Water Treatment Principles and Design, 2nd Edition. New Jersey: John Wiley & Sons, Inc. pg.890 – 940.
[7] Crittenden, J.C. et al. (2012b) MWH’s water treatment, John Wiley & Sons, Inc. eBooks. https://doi.org/10.1002/9781118131473.
[8] Culp, L. G. and Culp, L. R. (1974). New Concept in Water Purification. New York: VanNostrand Reinhold Company. Ch.3. p8. 51 – 83.
[9] DEWA, 2010. Technical Specifications. [pdf]. Available at: http://www.dewaco.fi/sites/default/files/custom_images/docs/CSS.pdf [Accessed on 04/March/2023].
[10] DEWA, 2023. Sludge and Scum Collectors (Chain & Flight Type). [Image Online] Available at: http://www.dewaco.fi/products/sludge-and-scum-collectors-chain-flight-type [Accessed on04/March/2023].
[11] DEWA, 2023. Sludge and Scum Collectors (Chain & Flight Type). [Online] Available at: http://www.dewaco.fi/products/sludge-and-scum-collectors-chain-flight-type [Accessed on 04/March/2023].
[12] Engelhardt, T., 2010. Granular Media Filtration for Water Treatment Applications. [pdf]. Available at: http://www.hach.com/cms-portals/hach_com/cms/documents/pdf/applicationseminars/Granular-Media-Filtration1.pdf [Accessed on 04/March/2023].
[13] Fair, G. M., Geyer, J. C. and Okun, D. A., 1968. Water and Wastewater Engineering, Volume2.Japan: John Wiley & Sons, Inc. pg. Ch.27. pp.1-11.
[14] Faust, S.D. and Aly, O.M. (2018b) Chemistry of Water Treatment, Second edition, CRC Press eBooks. https://doi.org/10.1201/9781315139265
[15] Frostburg, 2023. Water Density Calculator. [Online] Available at: http://antoine.frostburg.edu/chem/senese/javascript/water-density.html [Accessed on 03/March/2023].
[16] Gray, N. F., 1994. Drink Water Quality. Chichester: John Wiley & Sons Ltd. Ch.3. pp.92.
[17] Hamouda, M.A., Anderson, W.B. and Huck, P.M. (2009b) Decision support systems in water and wastewater treatment process selection and design: a review,’ Water Science & Technology, 60(7), pp. 1757–1770. https://doi.org/10.2166/wst.2009.538
[18] Harris, K., Raine, R,. Flanigan, A. and Kolifrath, J. 2023. Home Guides. How to use Plants toKeep a Pond Clean. [Online] Available at: http://homeguides.sfgate.com/use-plants-keep-pond-clean-50106.html [Accessed on 28 January 2023].
[19] Hendricks, D. W. ,2006. Water Treatment Unit Process: Physical and Chemical. Florida: CRCPress. Ch. 12. pp. 589 – 590.
[20] Hudson, H.E., 1981. Water Clarification Processes: Practical Design and Evaluation. Van Nostrand Reinhold, New York, NY, USA. Available at: https://www.ircwash.org/resources/water-clarification-processes-practical-design-and-evaluation [Accessed 16 December 2024].
[21] Jekel, M.R. and Heinzmann, B., 1989. Residual aluminum in drinking water treatment. EPA, Aqua, pp. 281-288. Available at: https://hero.epa.gov/hero/index.cfm/reference/details/reference_id/2066370 [Accessed 16 December 2024].
[22] Leopold, a Xylem brand, 2012. Leopold Type S Technology Underdrain. [pdf]. Available at: http://www.xylemwatersolutions.com/scs/uk/en-gb/brands/leopold/Documents/Leopold%20Type%20S%20Underdrains.pdf [Accessed on06/March/2023].
[23] Leopold, a Xylem brand, 2014. FilterWorx Performance Filters. [pdf]. Available at: http://www.xylem.com/assets/Resources/1804-Leopold-FilterWorx-Filtration.pdf [Accessedon 06/March/2023].
[24] Mountain Empire Community College, 2023. Lesson 6: Filtration. [Online] Available at: http://water.me.vccs.edu/courses/env110/lesson6_5.htm [Accessed on 06/March/2023].
[25] Rabah, F., 2012. Water Treatment, Lesson 5: Filtration. [pdf]. Available at: http://site.iugaza.edu.ps/frabah/files/2012/02/Water-treatment-Lecture-5-EENV.pdf [Accessed on 06/March/2023].
[26] Shuokr Quarani Aziz, Jawan S.Mustafa., 2019. Step by step design and calculation for water treatment plant units. journal of advances in environmental biology. DOI:10.22587/aeb.2019.13.8.1.
[27] Tchobanoglous, G., Burton, F. L. and Stensel, H. D., 2003. Wastewater Engineering, Treatment and Reuse, 4th ed. U.S.A: McGraw-Hill. Ch.12. pp1270-1290.
[28] Tebbutt, T. H. Y., 1998. Principles of Water Quality Control, 5th ed. Oxford: Butterworth-Heinemann.Ch.12. pp.151.
[29] Tebbutt, T. H. Y.,1998. Principles of Water Quality Control, 5th Edition. Oxford: Butterworth-Heinemann pg. 162 – 175.
[30] The American Water Works Association (AWWA), and The American Society of Civil Engineers (ASCE). 2012. Water Treatment Plant Design. 5th ed. New York: McGraw-Hill. https://www.accessengineeringlibrary.com/content/book/9780071745727
[31] Tota-Maharaj, K. and Hills, C.D., 2023. Long-term environmental performance of stormwater biofiltration sorption media in sustainable drainage systems (SuDS). Journal of Environmental Science and Management, 26(1), pp.78-84. https://doi.org/10.47125/jesam/2023_1/06
[32] Uggetti, E., 2011. Sewage Sludge Treatment in constructed Wetlands. [Image Online] Available at: http://gemma.upc.edu/images/downloads/thesis/tesis_enrica%20uggetti.pdf [Accessed on 25/March/2023].
[33] UNIFILT Corporation, 2014. Frequently Asked Questions. [Online] Available at:http://unifilt.com/faqs.php. [Accessed on 04/March/2023].
[34] University of Memphis, 2023. Part 1 – Introduction to Water Filtration. [Online] Available at: http://www.ce.memphis.edu/1101/notes/filtration/filtration-1.html [Accessed on 04/March/2023].
[35] US EPS Revised Total Coliform Rule and Total Coliform Rule. Revised Total Coliform Rule And Total Coliform Rule. Available online at: https://www.epa.gov/dwreginfo/revised-total-coliform-rule-and-total-coliform-rule Accessed: February 26, 2014.
[36] Vaxas, 2012. Dynamic Viscosity of Liquid Water from 0°C to 100°C. [pdf]. Available at: http://www.vaxasoftware.com/doc_eduen/qui/viscoh2o.pdf [Accessed on 03/March/2023].
[37] World Health Organization, 2022. Guidelines for drinking-water quality: incorporating the first and second addenda. World Health Organization. Guidelines for drinking-water quality: fourth edition incorporating the first and second addenda. Available online at: https://www.who.int/publications/i/item/9789240045064 . Accessed: 21 March 2022.