Assessment of Water Quality and Fungal Contamination in Hospital Wastewater from Erbil City, Iraq
Abstract
The present study focused on the wastewater from three hospitals in Erbil: Hawler Teaching Hospital, Rezgary Teaching Hospital, and Rozhawa Emergency Hospital. Wastewater samples were collected monthly (December 2024 to February 2025) for some parameters related to water quality, fungal counts, and detections. The study aims to determine the risk of hospital wastewater in terms of contaminated disposal water and to investigate the types of fungi present in it. The results showed that wastewater was characterized by neutral to slightly alkaline. Electrical conductivity (EC) and biochemical oxygen demand (BOD5) values were high and exceeded local and international discharge guidelines. Related to nutrient content, both phosphate (PO4) and nitrate (NO3) were high in all sampling sites. A total of 13 fungal genera were identified, suggesting that hospital wastewater provides a conducive environment for fungal growth. The highest number of fungi and the most isolates were detected at Razgary Teaching Hospital, where 8300 (CFU/mL-1) and 16 species of fungi were identified out of a total of 19 species, coinciding with the highest temperature and lowest phosphate concentration compared to other hospitals. The most common fungal species detected in all studied hospitals were: Aspergillus niger, Candida albicans, Geotrichum candidum, Mucor sp., and Penicillium sp. The results highlighted that the risk of polluted hospital wastewater poses a threat to both public health and the environment. Therefore, it is necessary to build sewage treatment units and monitor the quality of the discharged water.
References
- L. Cai and T. Zhang, "Detecting human bacterial pathogens in wastewater treatment plants by a high-throughput shotgun sequencing technique," Environmental Science Technology, vol. 47, no. 10, pp. 5433-5441, https://doi.org/10.1021/es400275r 2013.
- T. Asfaw, L. Negash, A. Kahsay, and Y. Weldu, "Antibiotic resistant bacteria from treated and untreated hospital wastewater at Ayder Referral Hospital, Mekelle, North Ethiopia," Advances in Microbiology, vol. 7, no. 12, pp. 871-886, 2017. https://doi.org/10.4236/aim.2017.712067
- T. Yuan and Y. Pian, "Hospital wastewater as hotspots for pathogenic microorganisms spread into aquatic environment: a review. ," Front Environ Science, vol. 10, p. 1091734, 2023. https://doi.org/10.3389/fenvs.2022.1091734
- V. H. Ogwugwa, G. O. Oyetibo, and O. O. Amund, "Taxonomic profiling of bacteria and fungi in freshwater sewer receiving hospital wastewater," Environmental Research, vol. 192, p. 110319, 2021. https://doi.org/10.1016/j.envres.2020.110319
- A. Kumari, N. S. Maurya, and B. Tiwari, "Hospital wastewater treatment scenario around the globe," in Current developments in Biotechnology and Bioengineering: ELSEVIER, 2020, pp. 549-570.
- G. Caggiano et al., "Occurrence of fungi in the potable water of hospitals: a public health threat," Pathogens, vol. 9, no. 10, p. 783, 2020. https://doi.org/10.3390/pathogens9100783
- K. S. Olawale, R. O. Oladele, R. F. Peters, B. E. Ekeng, and F. T. Ogunsola, "Fungal contamination of the water distribution system of a tertiary hospital water supply system in a resource-limited setting," Therapeutic Advances in Infectious Disease, vol. 11, pp. 1-12, 2024. https://doi.org/10.1177/20499361241265953
- E. Mataraci-Kara, M. Ataman, G. Yilmaz, and B. Ozbek-Celik, "Evaluation of antifungal and disinfectant-resistant Candida species isolated from hospital wastewater," Archives of Microbiology, vol. 202, no. 9, pp. 2543-2550, 2020. https://doi.org/10.1007/s00203-020-01975-z
- A. Srinivasan, J. L. Lopez-Ribot, and A. K. Ramasubramanian, "Overcoming antifungal resistance," Drug Discovery Today: Technologies, vol. 11, pp. 65-71, 2014. https://doi.org/10.1016/j.ddtec.2014.02.005
- N. T. Mhlongo, M. Tekere, and T. Sibanda, "Prevalence and public health implications of mycotoxigenic fungi in treated drinking water systems," Journal of water health, vol. 17, no. 4, pp. 517-531, 2019. http://iwaponline.com/jwh/article pdf/17/4/517/644645/jwh0170517.pdf
- R. B. Baird, A. D. Eaton, and E. W. Rice, Standard methods for the examination of water and wastewater, 23 ed. USA, 2017
- H. M. Wehr and J. F. Frank, Standard methods for the examination of dairy products. American Public Health Association, 2004.
- Metcalf et al., Water reuse: Issues, Technologies, and Publications. USA: McGraw-Hill 2007
- A. Zaghloul, M. Saber, and C. El-Dewany, "Chemical indicators for pollution detection in terrestrial and aquatic ecosystems," Bulletin of the National Research Centre, vol. 43, no. 1, p. 156, 2019. https://doi.org/10.1186/s42269-019-0203-x
- N. F. Kadhim, W. J. Mohammed, I. M. Al Hussaini, H. Al-Saily, and R. N. Ali, "The efficiency of some fungi species in wastewater treatment," Journal of Water Land Development, vol. VI-IX, no. 50, pp. 248-254, 2021. https://doi.org/10.24425/jwld.2021.138180
- J. Potapowicz, D. Szumińska, M. Szopińska, S. Czapiewski, and Ż. Polkowska, "Electrical conductivity and pH in surface water as tool for identification of chemical diversity," Ecological Chemistry Engineering, vol. 27, no. 1, pp. 95-111, 2020. https://doi.org/10.2478/eces-2020-0006
- W. H. O. WHO, "WHO Guidelines for the Safe Use of Wastewater, Excreta and Greywater.," in Excreta and Greywater Use in Agriculture vol. 4, ed. Geneva: WHO, 2006.
- S. F. Johnson, "Methemoglobinemia: Infants at risk," Current Problems in Pediatric Adolescent Health Care, vol. 49, no. 3, pp. 57-67, 2019. https://doi.org/10.1016/j.cppeds.2019.03.002
- J.-L. Bertrand-Krajewski, "Pharmaceuticals and detergents in hospital and urban wastewater: comparative monitoring, treatment, and assessment of impacts," Environmental Science Pollution Research, vol. 25, no. 10, pp. 9195-9196, 2018. https://doi.org/10.1007/s11356-018-1445-0
- G. Sarizadeh, S. Geravandi, A. Takdastan, P. Javanmaerdi, and M. J. Mohammadi, "Efficiency of hospital wastewater treatment system in removal of level of toxic, microbial, and organic pollutant," Toxin Reviews, vol. 41, no. 3, pp. 721-730, 2022. https://doi.org/10.1080/15569543.2021.1922923
- Y. A. Shekha, "The effect of Erbil city wastewater discharge on water quality of Greater Zab river, and the risks of irrigation," PhD, University of Baghdad, 2008.
- R. S. Al-Wasify, M. N. Ali, and S. R. Hamed, "Biodegradation of dairy wastewater using bacterial and fungal local isolates," Water Science Technology, vol. 76, no. 11, pp. 3094-3100, 2017. https://doi.org/10.2166/wst.2017.481
- G. Singh and A. Urhekar, "Virulence factors detection in Aspergillus isolates from clinical and environmental samples," Journal of Clinical Diagnostic Research, vol. 11, no. 7, p. DC13, 2017. https://doi.org/10.7860/JCDR/2017/24055.10211
- G. M. Gadd, "Geomycology: biogeochemical transformations of rocks, minerals, metals and radionuclides by fungi, bioweathering and bioremediation," Mycological Research, vol. 111, no. 1, pp. 3-49, 2007. https://doi.org/10.1016/j.mycres.2006.12.001
- V. K. Sharma, M. P. Shah, S. Parmar, and A. Kumar, Fungi Bio-prospects in Sustainable Agriculture, Environment and Nano-technology: Volume 2: Extremophilic Fungi and Myco-mediated Environmental Management. India: Academic Press, 2020.
Identifiers
Download this PDF file
Statistics
Downloads
How to Cite
Copyright and Licensing

This work is licensed under a Creative Commons Attribution 4.0 International License.





