Municipal Wastewater Treatment With Bentonite From Milos Island, Greece

Bourliva, Anna; Michailidis, Kleopas; Sikalidis, C.; Filippidis, Anestis; Apostolidis, N

doi:10.12681/bgsg.11660

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…That techniques are effective in inactivating bacterial pollutants at required levels, but that methods cause dangers decontamination byproducts or need the use of a secondary disinfectant. So, many efforts to obtain other alternative disinfectants with less processing time and do not give byproducts, and keep water quality needs [24]. : represented that kaolin is reduced bacterial population; a ≥ 3 log10.…”

Section: The Microbiological Results (Total and Fecal Coliform)mentioning

confidence: 99%

kaolin for management of organic and inorganic pollutants, as well as pathogenic microorganisms in municipal wastewater

faisle,

El- Rabiei,

farghali

et al. 2023

Labyrinth: Fayoum Journal of Science and Interdisciplinary Stud

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According to the World Water Resources Development Report of March 2018, global demand for water resources is increasing at an annual rate of 1% due to factors such as population growth, changes in economic development models, and diversification of consumption patterns. Water is certainly the greatest vital natural resource. Water supply is a basic requirement needed by living creatures and human beings. the basis of life on earth is water. third world countries and developing countries are suffering from potable water needs problems because of inadequate financial resources. Because of contaminated drinking water in developing countries, 15 million infants die each year, as well as poor hygiene and malnutrition. This paper focuses on the use of naturally occurring kaolin in batch experiments to assess its efficiency in removing organic and inorganic pollutants, as well as pathogenic microorganisms, from real municipal wastewater. The elements evaluated include COD (chemical oxygen demand), BOD (biological oxygen demand), TSS (total suspended solids), and O&G (oil and grease). The results indicate that kaolin demonstrates effective removal efficiencies across different concentration ranges and pH levels ranging from 3 to 12. For the initial treatment, the maximum recovery efficiencies for COD, BOD, TSS, turbidity, oil & grease, and total coliform are 83%,

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Section: The Microbiological Results (Total and Fecal Coliform)mentioning

confidence: 99%

kaolin for management of organic and inorganic pollutants, as well as pathogenic microorganisms in municipal wastewater

faisle,

El- Rabiei,

farghali

et al. 2023

Labyrinth: Fayoum Journal of Science and Interdisciplinary Stud

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“…Bentonites, on the other hand, are defined as clays containing predominantly montmorillonite and have formed as a result of the chemical decomposition of volcanic ash, tuff, and lava rich in aluminum and magnesium. There is a significant number of studies on wastewater and water treatment sludge from bentonite and bentonite-based materials [18]. On the other hand, the usability of zeolite in water treatment is being investigated by researchers [19].…”

Section: Introductionmentioning

confidence: 99%

Stabilization of Zeolite and Bentonite with Sewage Sludge Ash

Yıldız

Ceylan

2023

Period. Polytech. Civil Eng.

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In this study, it is aimed to evaluate the wastewater sludge supplied locally at 100 tons/day in the investigation area. In this context, the geotechnical properties of bentonite, zeolite-type clays and sands, which are common in the investigation area, were determined by mixing with sewage sludge ash (SSA) in specified ratios. Grain size distribution and specific gravity of pure materials and mixtures were determined. Direct shear tests, permeability tests, consistency limits tests, modified proctor tests and PH determination tests were performed with the mixtures. Soils were mixed with 0.5, 7.5, 10 and 12.5 percent SSA in order to determine the physical, chemical and mechanical properties. Mixtures of sand with 40% bentonite (i.e., BS40) and sand with 40% zeolite (i.e., ZS40) were used as host materials for SSA inclusion. As a result of extensive laboratory studies, it was observed that the engineering properties of the specimens changed significantly as a result of the 7.5% and 12.5% mixture of SSA. BS40/SSA7.5 and ZS40/SSA12.5 samples from the mixtures reached 83 kPa and 80 kPa maximum shear strength under 200 kPa normal pressure. The maximum unit weight of specimens was achieved by BS40/S5 and ZS40/S5 specimens as 1.72 and 1.82 g/cm3, respectively. With the addition of SSA, the hydraulic permeability of the mixtures decreased to an order of 10E–8 (cm/s) for BS40/SSA12.5 and ZS40/12.5 specimens. Experimental studies have provided significant engineering and environmental benefit in the evaluation of sewage sludge ash, which is inevitable in residential areas.

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Evaluation of selective clay minerals and biochar as materials for sewage sludge stabilization

Balidakis,

Matsi,

Ipsilantis

et al. 2023

Int. J. Environ. Sci. Technol.

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The objectives of this study were to evaluate sewage sludge’s stabilization with untested until now materials, such as selective clay minerals or biochar in comparison with liming, for enhancing sludge’s fertilization capacity. Dewatered sewage sludge was mixed with bentonite, vermiculite, zeolite, biochar or lime at rates of 0, 15 and 30%, air-dried and analyzed for pathogens and chemical properties. Almost all fecal indicators of treated sludge with 15% bentonite, vermiculite or biochar were reduced by at least one-logarithmic unit (log10) (indicative value of sludge’s stabilization), whereas those of limed sludge were undetectable. Electrical conductivity of all treatments significantly increased, and the highest values were obtained for untreated (6.1 dS m−1) and limed sludge (above 7.0 dS m−1 for both addition rates). The untreated sludge had the significantly highest water-soluble ammonium-nitrogen (2817 mg kg−1) and phosphorus (263 mg kg−1) concentrations followed by sludge treated with bentonite, vermiculite or biochar, whereas limed sludge had the lowest content. Boron concentration of the untreated sludge was similar to the treated sludge. Total concentrations of heavy metals were far below the legislative permissible levels for sludge’s agronomic use. Nutrients’ total content of treated sludge ranged at levels of similar magnitude to the untreated sludge, except for certain cases where they were increased because of the materials’ composition. Consequently, sewage sludge treated with 15% bentonite, vermiculite or biochar seems to be stabilized, retain bioavailable nitrogen and serve as a fertilizer of macro- and micronutrients. However, potential risks of agronomic use, i.e., soil salinization and boron phytotoxicity, should be considered.

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Municipal Wastewater Treatment With Bentonite From Milos Island, Greece

Abstract: Abstract

Cited by 5 publications

References 12 publications

kaolin for management of organic and inorganic pollutants, as well as pathogenic microorganisms in municipal wastewater

kaolin for management of organic and inorganic pollutants, as well as pathogenic microorganisms in municipal wastewater

Stabilization of Zeolite and Bentonite with Sewage Sludge Ash

Evaluation of selective clay minerals and biochar as materials for sewage sludge stabilization

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