The effect of ozone technology in the process of surface water decontamination on coagulants and filters

Авторы:

Palvan Kalandarov (Первый автор)

Yerassyl Balpankul (Соавтор)

Kurmangazy Sarsanbekov (Соавтор)

Aldabergen Bektilevov (Соавтор)

Anar Khabay (Соавтор)

Издательство:

E3S Web of Conferences

Дата издания

30.08.2024

На каком языке издана

Английский язык

ISSN

25550403

Область исследования

Инжиниринг и технологии

Тип исследования

Прикладное

Аннотация (краткое описание)

The presence of natural organic matter (NOM) poses many challenges in the process of purifying water intended for drinking. The presence of NOM leads to high coloration due to natural conditions. During the coagulation and flocculation processes, NOM stabilizes dispersed and colloidal particles. Currently, there are many methods for removing natural organic matter. In Kazakhstan, coagulation is commonly used for treating most waters, which effectively reduces color and NOM. It is known that the efficiency of ozonation and coagulation is high when they are used together. The impact of ozonation on the properties of coagulation is significant because coagulation is the most widespread process for treating drinking water. The combination of ozonation with coagulation has been proposed as an improved method for reducing coloration and removing surfactants. The studies were conducted at the K.I. Satpayev Kazakh National Technical University, where a liquid phase ozonation laboratory system was developed. The aim of the research was to demonstrate the positive effect of combining ozonation with coagulation on the removal of color and surfactants in surface waters. Studies were conducted on model waters with different contents of humic substances. Positive results were obtained at low concentrations of ozone (0.1…0.8 mg/l) and low doses of coagulant. A low dose of ozone showed improvement for coagulation. The results of the study indicate that ozonation, combined with coagulation, has a positive effect on color removal, enhances the removal of NOM, and reduces the necessary

Соответствие целям устойчивого развития (ЦУР)

URI

https://doi.org/10.1051/e3sconf/202456303078

DOI

10.1051/e3sconf/202456303078

Тип публикаций

Статья

Практическое значение

The results of this scientific research conclude that pre-coagulation ozonation positively affects color removal, which is associated with the presence of natural organic matter (NOM) and dissolved organic carbon (DOC), enhancing the removal of NOM through coagulation and also allowing for a reduction in coagulant dosage by up to two-fold. Low doses of ozone can control the fragmentation of humic substances, avoiding a decrease in molecular mass which could impair flocculation, particularly deteriorating the complete removal of NOM. This indicates that low doses of ozone improve coagulation. By utilizing a dosage of approximately 20 μmol Al/L PAX coagulant, it is possible to reduce color by about 70 - 80% with and without ozonation, respectively, suggesting that ozonation can reduce the amount of PAX coagulant needed for satisfactory color removal. Analysis of data and literature sources indicates that the quantity of NOM with average molecular masses increases during low-dose ozonation, which facilitates ozonation in simultaneously aggregating small particles and breaking down larger ones, making them more susceptible and easier to remove through coagulation. The use of ozone in various industries ensures environmental safety, especially in agriculture.

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Научные издания SU

Файлы документа

e3sconf_iceste2024_03078.pdf