Isolation, identification and reviewing the health effect of HPC bacteria in household point-of-use (PoU) water treatment devices: a case study, Ahvaz, Iran

Talepour, Nastaran; Mirfazaelian, Hadi; Nasseri, Simin; Jaafarzadeh, Neemat; Mesdaghinia, Alireza; Borji, Saeedeh Hemmati

doi:10.1007/s40201-020-00577-7

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…A study conducted on household water puri cation devices in Ahvaz (Iran) showed that the HPC index at the output of these devices is higher than the input, so it is necessary to pay attention to the on time replacement of these lters (Talepour et al, 2021). A review of studies related to the performance of these devices in Iran showed that if the lters are not replaced on time, the microbial quality of the outgoing water will decrease.…”

Section: Introductionmentioning

confidence: 99%

“…In Angela D. Coulliette and colleagues' investigation into the e cacy of household water puri cation systems in developing countries, they concluded that the puri cation of water signi cantly reduces the risk of infectious diseases (Coulliette et al, 2013). However, contrasting ndings from other studies suggest that water puri ed by these devices remains susceptible to various types of bacteria (Aydin et al, 2019;Gholami et al, 2021;Talepour et al, 2021;Lin et al, 2022). In a research conducted in Sari (Iran), the results showed that a signi cant correlation exists between the lifespan of lters and the presence of heterotrophic bacteria and residual chlorine in the e uent.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of effluent quality changes of household water purifiers: A case study of Ahvaz city

Mirsalari,

Sasani,

Azizipour

et al. 2024

Preprint

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In some areas, the increase in surface water salts and the wear and tear of urban water distribution network pipes have caused citizens to turn to household water purification devices. However, if their filters are not replaced on time, the quality of the output water will decrease. In this study, the efficacy of three household water purifiers was evaluated over a one-year period in Ahvaz city. TDS, pH and total coliforms were measured monthly at both the inlet and outlet of all three systems. Furthermore, the study involved weekly observations of the color change on the surface of the first filters, in addition to monthly measurements of the turbidity of both the inlet and outlet water from their first filters. Based on the findings of this study, the absence of coliforms in their output was confirmed. Furthermore, within the initial month following the installation of the first filter, the turbidity of its output water exceeded admissible limit. By the second month, a maximum change in filter color was observed. Also, following two years of membrane installation, it is essential to regularly monitor the effluent TDS. If the TDS of output water exceeds the admissible limit at any point, it is imperative to replace the membrane filter. Additionally, post-membrane installation, the effluent's TDS measures less than 50 mg/l, indicating a potential risk of water acidification. Therefore it is advisable to regulate the effluent pH by adjusting the mixing valve or replacing the sixth filter.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of effluent quality changes of household water purifiers: A case study of Ahvaz city

Mirsalari,

Sasani,

Azizipour

et al. 2024

Preprint

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Excellent antimicrobial and photocatalytic performance of C/GO/TiO2/Ag and C/TiO2/Ag hybrid nanocomposite beds against waterborne microorganisms

Jakubczak

Bury

Wojciechowska

et al. 2023

Materials Chemistry and Physics

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Detection and Measurement of Bacterial Contaminants in Stored River Water Consumed in Ekpoma

Tenebe,

Babatunde,

Ogarekpe

et al. 2024

Water

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This study was conducted in Ekpoma, a town dependent on rainwater and river water from nearby areas because of a lack of groundwater sources, and the physicochemical and bacteriological (heterotrophic plate count [HPC], total coliform count [TCC], and fecal coliform count [FCC]) properties of 123 stored river water samples grouped into five collection districts (EK1 to EK5). The results were compared with regulatory standards and previous regional studies to identify water quality trends. While most physicochemical properties met drinking water standards, 74% of samples had pH values > 8.5. Twenty-seven samples were fit for drinking, with EK4 having the highest number of bacterio-logically unsuitable samples. Ten bacterial species were identified, with Gram-negative short-rod species such as Escherichia coli, Klebsiella pneumoniae, and Salmonella typhimurium being predominant. HPC values varied from 367 × 10⁴ to 1320 × 10⁴ CFU/mL, with EK2 (2505 × 10⁴ CFU/mL) and EK5 (1320 × 10⁴ CFU/mL) showing particularly high counts. The TCC values ranged from 1049 × 10⁴ to 4400 × 10⁴ CFU/mL, and the FCC values from 130 × 10⁴ to 800 × 10⁴ CFU/mL, all exceeding WHO limits (1.0 × 102 CFU/mL). Historical data show no improvement in water quality, emphasizing the need for individuals to treat water properly before consumption. The findings provide baseline data for local water authorities and serve as a wake-up call for adequate water treatment, storage interventions, and community education on water security. Additionally, this study offers a practical process for improving the quality of water stored in similar regions.

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Isolation, identification and reviewing the health effect of HPC bacteria in household point-of-use (PoU) water treatment devices: a case study, Ahvaz, Iran

Cited by 3 publications

References 31 publications

Evaluation of effluent quality changes of household water purifiers: A case study of Ahvaz city

Evaluation of effluent quality changes of household water purifiers: A case study of Ahvaz city

Excellent antimicrobial and photocatalytic performance of C/GO/TiO2/Ag and C/TiO2/Ag hybrid nanocomposite beds against waterborne microorganisms

Detection and Measurement of Bacterial Contaminants in Stored River Water Consumed in Ekpoma

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