Use of MID-MIX® treated sewage sludge in cement mortars and concrete

Nakić, Domagoj; Vouk, Dražen; Serdar, Marijana; Cheeseman, Christopher

doi:10.1080/19648189.2018.1474383

Cited by 10 publications

(12 citation statements)

References 10 publications

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“…The management of municipal sludge via the production of building materials is attracting increasing attention in China. According to previous studies, municipal sludge can be used to prepare brick [ 45 , 46 ], ceramsite [ 47 , 48 , 49 ], and concrete [ 50 ]. For brick making, the quality of sludge should meet the requirements of GB/T 25031-2010 [ 51 ] ( Table S3 in Supplementary Information ).…”

Section: Discussionmentioning

confidence: 99%

Characterization, Spatial Variation and Management Strategy of Sewer Sediments Collected from Combined Sewer System: A Case Study in Longgang District, Shenzhen

Luo

Bao

Yang

et al. 2021

IJERPH

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In the urban drainage system, the formation of sewer sediments is inevitable, and the removal of sewer sediments is necessary for system maintenance. Disposal of arisings from sewer sediment removal is becoming a serious environmental issue. The current knowledge of sewer sediments is limited, which is restrained to sewer sediments management. To better understand this municipal waste, the sewer sediments of a combined sewer system in Longgang District, Shenzhen were collected and characterized, and the spatial distribution characteristics of contaminants were analyzed. Based on the bivariate correlation analysis, it is found that many contaminants in sewer sediments have a strong relationship with spatial variables. Compared to the sewer sediments in industrial areas, those in residential areas contain higher concentrations of Hg and phosphorus. The sediments in the sewage conduit also contain more organic matter (OM), phosphorus, Cu, and Ni, and the sediments in the rainwater conduit contain a higher concentration of Cd. Moreover, the sediments produced in different catchments also show huge differences in the content of contaminants. These spatial distribution characteristics may provide help for the further classification of sewer sediments, thereby making the disposal of sediments more targeted. According to the local standards of sludge disposal, land application and incineration are not suitable for managing sewer sediments due to the low OM content and poor lower heating value (LHV). Although sanitary landfill is feasible for sewer sediments disposal, the complicated composition of sewer sediments still poses the risk of polluting the surrounding environment. The management of sewer sediments via the production of building materials is a promising technical route that can avoid the migration of hazardous contaminants and produce valuable products. This study may improve our understanding of sewer sediments and provide a reliable recommendation for sewer sediment management.

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Section: Discussionmentioning

confidence: 99%

Characterization, Spatial Variation and Management Strategy of Sewer Sediments Collected from Combined Sewer System: A Case Study in Longgang District, Shenzhen

Luo

Bao

Yang

et al. 2021

IJERPH

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“…A not so often used posttreatment method of WWTS is solidification [ 27 ], which is applied in only several WWTPs throughout Europe. This technology is a physical and chemical oxido-reduction process that involves the reaction of wastes with additives based on calcium-oxide and calcium-hydroxide.…”

Section: Supplementary Cementitious Materials In Concrete Mixturesmentioning

confidence: 99%

“…The product of these reactions is inert material and steam. According to [ 27 , 28 ], the technology is recognized by the EU as the best available technology for treating selected wastes from the oil and petrochemical industries, pharmaceutical wastes, food processing wastes and wastewater treatment sludge. The product obtained from this treatment technology is a white-gray inert granular powder that can be disposed of in nonhazardous waste landfill [ 27 , 29 ].…”

Section: Supplementary Cementitious Materials In Concrete Mixturesmentioning

confidence: 99%

“…According to [ 27 , 28 ], the technology is recognized by the EU as the best available technology for treating selected wastes from the oil and petrochemical industries, pharmaceutical wastes, food processing wastes and wastewater treatment sludge. The product obtained from this treatment technology is a white-gray inert granular powder that can be disposed of in nonhazardous waste landfill [ 27 , 29 ]. Nakic et al [ 27 ] were investigating the possibility of using SWWTS obtained from WWTP at Koprivnica, Croatia, in concrete and mortar mixtures.…”

Section: Supplementary Cementitious Materials In Concrete Mixturesmentioning

confidence: 99%

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Evaluation of Solidified Wastewater Treatment Sludge as a Potential SCM in Pervious Concrete Pavements

et al. 2022

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Waste and recycled materials have recently been used in the construction industry to comply with the principles of circular economy and sustainable development. The aim of this paper is to examine the potentials of solidified wastewater treatment sludge (SWWTS) as a supplementary cementitious material (SCM) in the production of lightweight pervious concrete pavers (LWPCP) suitable for pedestrian trails and rooftops (green) that comply with EU standards. Detailed characterization of SWWTS was performed, in order to understand its properties related to application as SCM, which led to the conclusion that it may be applied only as a filler, having 89.5% of Ca(OH)2. After thorough characterization, LWPCP samples were prepared and testing of physical and mechanical properties was conducted. The research showed that partial replacement of cement with SWWTS led to the decrease of all mechanical properties, ranging between 3.91 and 5.81 MPa for compressive strength and 0.97 to 1.23 MPa for flexural strength. However, all of the investigated mixtures showed a value higher than 3.5 MPa, which was defined as the lowest compressive strength in the range of pervious concrete properties. The addition of SWWTS led to a slight decrease in bulk density of the mixtures and an increase in water absorption. This could be explained by the reduction in hydration products that would fill in the micropores of the matrix, since SWWTS showed no pozzolanic reactivity. Pore sizes that prevail in the tested binder matrices are in accordance with the results measured on ordinary pervious concrete (the largest fraction of pores had a diameter between 0.02 and 0.2 μm). Low thermal conductivity nominates produced pavers as potential rooftop elements.

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“…Recent research is mostly focused on diverting SSA from landfill and using SSA whenever it is possible, for example in construction materials like cement mortars, concrete, bricks, and tiles (Areias et al, 2020;Chang et al, 2020;Chen et al, 2018;He & Wang;2019;Nakić et al, 2020;Oliva et al, 2019;Ottosen et al, 2020;Świerczek et al, 2018;Vouk et al, 2018;Zhou et al, 2020aZhou et al, , 2020b. Also, some studies have proven that the heavy metals from the SSA are encapsulated within the construction material produced (concrete, cement mortar, bricks), which results in a reduction of their leaching and makes the resulting product environmentally friendly (Donatello & Cheeseman, 2013;Cyr et al, 2007;Nakić et al, 2017;Vouk et al, 2016).…”

Section: Ssa Landfillingmentioning

confidence: 99%

Lca of Heavy Metals Leaching From Landfilled Sewage Sludge Ash

Nakić

Vouk

Šiljeg

et al. 2021

Journal of Environmental Engineering and Landscape Management

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Quantities of sewage sludge that are thermally treated (mostly incinerated) are increasing, resulting in growing quantities of sewage sludge ash (SSA) which also requires further management. Despite its potential as a resource, it is still largely landfilled. Considering the presence of potentially toxic and hazardous heavy metals in SSA, this paper analyzes how the change in the leaching concentrations of the selected heavy metals from landfilled SSA impacts the environment (air, water, and soil) by the means of LCA. When considering human toxicity potential as impact category, dominant impacts were due to emissions into the air, primarily caused by leaching of selenium and somewhat less cadmium, mercury and nickel. Mercury had a dominant impact when considering the terrestrial ecotoxicity potential impact. In the SSAs obtained from Croatian sludge, molybdenum leaching, along with selenium and mercury, showed a dominant impact. Therefore, due to the high variability of trace elements, detailed analysis of different SSAs is needed.

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Use of MID-MIX® treated sewage sludge in cement mortars and concrete

Cited by 10 publications

References 10 publications

Characterization, Spatial Variation and Management Strategy of Sewer Sediments Collected from Combined Sewer System: A Case Study in Longgang District, Shenzhen

Characterization, Spatial Variation and Management Strategy of Sewer Sediments Collected from Combined Sewer System: A Case Study in Longgang District, Shenzhen

Evaluation of Solidified Wastewater Treatment Sludge as a Potential SCM in Pervious Concrete Pavements

Lca of Heavy Metals Leaching From Landfilled Sewage Sludge Ash

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