Technological Aspects of Waterworks Sludge Treatment

Belkanova, M. Yu.; Nikolaenko, E V; Gevel, D A

doi:10.1088/1757-899x/262/1/012221

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…The value of the specific resistance to filtration (r, m/kg) characterizes the sludge’s water-carrying capacity. Studies [ 18 , 24 ] have shown that the untreated sludge of Chelyabinsk WTPs has a specific resistance to filtration between 1.5 × 10 13 m/kg and 6.3 × 10 13 .…”

Section: Resultsmentioning

confidence: 99%

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Structural Ceramics Modified by Water Treatment Plant Sludge

2020

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Water treatment plant (WTP) sludge is actively used in building materials production. The object of this research was modifying additives for ceramic bricks from WTP aluminium-containing sludge. The research aim of this study was to determine the suitability of a million-plus population city’s WTP sludge as a burning-out additive in the production of structural ceramics and to establish the optimal conditions for obtaining products with the best characteristics. The raw water belongs to water belongs to the hydrocarbonate class, the calcium group, and it is of low turbidity (1.5–40 mg/L kaolin). Sludge, sourced from WTP sedimentation tanks, was dewatered by adding lime or by using the freezing-thawing method. The spray-dried WTP sludge is introduced into the clay in amounts of 5% to 20% by weight. The addition of 20% reduces the sensitivity of the clay to drying, reduces the density of ceramic by 20% and simultaneously increases its compressive strength from 7.0 to 10.2 MPa. The use of WTP sludge as a modifying additive, pretreated by the freezing-thawing method, makes it possible to obtain ceramic bricks with improved properties. The results can be used for WTP sludge containing aluminium obtained by treating water of medium turbidity and medium colour.

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Section: Resultsmentioning

confidence: 99%

“…WTP sludge is a complex multicomponent system with a high content of coagulant hydrolysis products and a highly developed surface. The humidity as a result of sludge pumping exceeds 95% [ 18 , 24 ]. Such sludge, taking into account its hydroxide nature, cannot be filtered without preliminary treatment.…”

Section: Introductionmentioning

confidence: 99%

Structural Ceramics Modified by Water Treatment Plant Sludge

2020

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“…The municipal waterworks are units based on the physical and chemical treatments of raw fresh-water, mainly for human consumption, which produces huge amounts of wastes in form of sludge worldwide [1][2][3][4][5][6]. Waterworks sludge varies widely in terms of physical and chemical characteristics as a function of the nature of the raw fresh-water and chemical compounds applied during treatments.…”

Section: Introductionmentioning

confidence: 99%

Valorization of Municipal Waterworks Sludge to Produce Ceramic Floor Tiles

Rodrigues

Holanda

2018

Recycling

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In municipal waterworks large amounts of waste in the form of sludge have to be discarded. This investigation focuses on the processing of ceramic floor tiles incorporated with a municipal waterworks sludge. Four floor tile formulations containing up to 10 wt. % of the municipal waterworks sludge were prepared in order to replace the kaolin. The floor tile processing route consisted of dry powder granulation, uniaxial pressing, and firing between 1190 and 1250 • C using a fast-firing cycle (<60 min). The densification behavior and technological properties of the floor tile pieces as function of the sludge addition and firing temperature were determined. The development of the microstructure was followed by XRD and SEM/EDS. The results show that the replacement of kaolin with municipal waterworks sludge, in the range up to 10 wt. %, allows the production of ceramic floor tiles (group BIb and group BIIa, ISO 13006 Standard) at lower firing temperatures. These results suggest a new possibility of valorization of municipal waterworks sludge in order to bring economic and environmental benefits.

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The impact of the formation conditions and properties of the water treatment plants sludge on its usage in the ceramic bricks production

Орлов

Belkanova

Lymar

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Water treatment plants (WTP) sludge can be used in the construction industry. However, the composition and properties of WTP sludge are determined by the quality of water in the water source and the water treatment technology. At the same time, the technology for the manufacture of construction products requires a consistent quality of raw materials and reproducible characteristics of the finished products. In this paper, we studied the impact of a modifying add from WTP sludge on the properties of the clay composition and ceramic bricks. We used the WTP sludge formed in the fall and winter periods in the city of Chelyabinsk. The air-dry WTP sludge was introduced into the clay composition in an amount of 5-10% by mass. It is shown that the characteristics of the ceramic fragment are independent of the sludge collection season. It was found that the modifying add allows us to reduce the ceramics baking temperature by 50 °C without worsening the material baking index. The introduction of a 10% WTP sludge add helps to reduce the tendency of the air-dried brick to crack formation and accelerates the drying mode.

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Technological Aspects of Waterworks Sludge Treatment

Cited by 3 publications

References 4 publications

Structural Ceramics Modified by Water Treatment Plant Sludge

Structural Ceramics Modified by Water Treatment Plant Sludge

Valorization of Municipal Waterworks Sludge to Produce Ceramic Floor Tiles

The impact of the formation conditions and properties of the water treatment plants sludge on its usage in the ceramic bricks production

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