Effect of preozonation and prechlorination on total organic carbon removal in surface water treatment in Iran

Torabian, Ali; Ghadimkhani, A. A.; Mehrabadi, Abdollah Rashidi; Shokouhi, M.; Heidarzadeh, R.

doi:10.2495/wrm070291

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…Torabian et al evaluated the effect of pre-ozonation on the TOC removal in surface water treatment. The results showed that pre-ozonation not only supplied the required material to remove TOC, but also improved TOC removal (24). Generally, with increasing ozone dosage at different coagulant dosages slightly, TOC removal increased but at average coagulant dosages, it was decreased (25).…”

Section: Introductionmentioning

confidence: 92%

Effects of pre-ozonation and chemical coagulation on the removal of turbidity, color, TOC, and chlorophyll a from drinking water

Masoomi

Jaafarzadeh

Tabatabaie

et al. 2019

Environ Health Eng Manag

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Background: Ozone can be used as a single technology or in combination with other processes to improve the coagulation- flocculation or biodegradability in order to remove pollutants in natural water treatment. Methods: In this study, the effects of pre-ozonation with coagulant substances on the quality parameters of drinking water were investigated using humic acid, kaolin, clay, and green algae in a pilot scale. This study was conducted under laboratory conditions (at both acidic and alkaline pH in different dosages of ozone and coagulant at ozone contact time with simulated water sample (5-20 minutes) in different scenarios). Results: The highest removal efficiency of parameters in the state of pre-ozonation alone and preozonation with a coagulant was observed at contact time of 20 minutes, ozone dosage of 5 g/h, coagulant dosage of 25 mg/L, at alkaline pH along with a decrease in temperature. So that, the average removal rate of turbidity, total organic carbon (TOC), color, and chlorophyll a in contact time of 20 minutes was 76.9%, 52.8%, 66.6%, and 85%, respectively. However, compared to ozonation under similar conditions, the reduction in turbidity, TOC, color, and chlorophyll a was 36.13%, 24.4%, 32.13%, and 79.6%, respectively. Also, it was revealed that pre-ozonation with coagulant could effectively improve the removal of parameters. Conclusion: However, since pre-ozonation can be effectively used to improve the coagulation efficacy in the drinking water treatment, the pre-ozonation combined with coagulation is proposed as an alternative to conventional coagulation to improve the process of drinking water treatment plant.

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Section: Introductionmentioning

confidence: 92%

Effects of pre-ozonation and chemical coagulation on the removal of turbidity, color, TOC, and chlorophyll a from drinking water

Masoomi

Jaafarzadeh

Tabatabaie

et al. 2019

Environ Health Eng Manag

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The Effects of Pre-Ozonation on Drinking Water Quality Parameters

Masoomi¹,

Jaafarzadeh²,

Tabatabaie³

et al. 2021

CAJWR

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The study investigated the effects of pre-ozonation on the parameters such as turbidity, color, chlorophyll a and TOC on a pilot scale. The investigation results indicate that the amount of required ozone to remove TOC, color and turbidity depends on the quality of inlet water, and the efficiency of water ozonation depends on the process factors such as ozone dose, temperature, pH and ozone-water contact time. The study likewise shows that the lower amount of turbidity, TOC, temperature and higher alkaline pH of sample water boost the ozonation effect on removing the variables in question. The results also demonstrate a direct relationship between pH, ozone dosage and contact time, as well as an indirect relationship between temprerature and the removal of parameters.

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Effect of preozonation and prechlorination on total organic carbon removal in surface water treatment in Iran

Cited by 2 publications

References 9 publications

Effects of pre-ozonation and chemical coagulation on the removal of turbidity, color, TOC, and chlorophyll a from drinking water

Effects of pre-ozonation and chemical coagulation on the removal of turbidity, color, TOC, and chlorophyll a from drinking water

The Effects of Pre-Ozonation on Drinking Water Quality Parameters

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