Valorization of water treatment sludge waste by application as supplementary cementitious material

Godoy, Luis Gabriel Graupner de; Röhden, Abrahão Bernardo; Garcez, Mônica Regina; Costa, Eugênio Bastos da; Dalt, Silvana Da; Andrade, Jairo José de Oliveira

doi:10.1016/j.conbuildmat.2019.07.333

Cited by 68 publications

(26 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, the type of soil in the water source and any chemically based products or other materials disposed into water source may affect the WTS characteristics [15] [16]. Thus, it is obligatory to describe the sludge from each water treatment plant (WTP) for recycling and reuse uses [17].The concentration of aluminium and iron are 117.76 and 80 mg/g from the dry sludge. Those concentrations the represent about 15 % of total mass of the dry sludge, can help in coagulation process.…”

Section: Water Treatment Sludge Characteristicsmentioning

confidence: 99%

Reuse of Water Treatment Sludge in Coagulation Process for the Treatment of Raw Water From River Nile

Hegazy

Assem

2020

Journal of Al-Azhar University Engineering Sector

View full text Add to dashboard Cite

The process of recovery and reuse of water treatment sludge as a coagulant perform a sustainable solution that benefices economically and environmentally. High safety concerns are to be take in consideration during reuse of water sludge in water purification. Most of the previous researchers have applied several full-scale separation methods for an effective purification of coagulant, without pointing to the performance of the coagulant treatment. In this research we studies the characteristics of sludge resulted from the treatment process of raw water from the river Nile, then the produced sludge is chemically treated with an acid in order to reuse it again in coagulation. Acidified water treatment sludge performance in removing turbidity and dissolved organic carbon DOC have been evaluated. The optimum coagulant dose determined for coagulation process of raw Nile water was 36 ml/l, while the optimal pH range concluded for higher turbidity removal was from 6 to 8. The resulted water treatment sludge found to be reliable to use in conventional water treatment process. The study recommended for better performance of coagulation, to add a partial amount (at least 20 % of coagulant dose) of the proper coagulant to the recovered water sludge.

show abstract

Section: Water Treatment Sludge Characteristicsmentioning

confidence: 99%

Reuse of Water Treatment Sludge in Coagulation Process for the Treatment of Raw Water From River Nile

Hegazy

Assem

2020

Journal of Al-Azhar University Engineering Sector

View full text Add to dashboard Cite

show abstract

“…Nowadays, limestones are recommended in the European standard EN 197-1 as mineral additions, together with pozzolanic additives, and can be classified as an SCM similar to granulated blast furnace slag and fly ash [6,9]. The use of additives in concrete significantly reduces the environmental impacts of concrete and shows economic and geological benefits [10]. The use of pozzolanic materials from various industrial or natural sources as additives has been reported to show satisfactory results for the manufacture of cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the use of silica-alumina refractory waste as a supplementary cementitious material

et al. 2021

View full text Add to dashboard Cite

The use of supplementary cementitious materials (SMCs) is one of the three essential factors for the sustainability of the cement industry. To reduce CO 2 emissions, several studies have introduced new methods for the utilization of industrial wastes such as the addition into cementitious materials. The objectives of this study were to chemically and physically characterize refractory ceramic industry waste and determine its viability as an SMC. The pozzolanic characteristics or SMC characteristics of the refractory waste were investigated using standard tests. The results revealed that the refractory waste was mainly composed of Al 2 O 3 and SiO 2 . The mineralogical analysis revealed that the mullite was the major phase of the waste, followed by small amounts of cristobalite and quartz phases. The results of the modified Chapelle test and pozzolanic activity index with lime after 7 days indicated that the waste did not meet the minimum pozzolanicity required by the standard. However, the waste improved the mechanical resistance of the cement specimens containing the waste after 28 days compared with the reference sample, indicating the promising potential of the material for this application. This result indicated that the refractory waste shows a filler type effect, and thus, can be employed as an SCM.

show abstract

“…Recentemente, alguns pesquisadores têm se dedicado ao estudo do lodo de ETA calcinado como material cimentício suplementar. Godoy et al (2019) realizaram a caracterização de um lodo de uma estação de tratamento de água localizada no sul do Brasil. Os autores verificaram que a temperatura de calcinação influencia na reatividade do resíduo.…”

Section: Introductionunclassified

“…Dessa maneira, o estudo contribui para encontrar uma alternativa tecnicamente viável para o lodo de ETA, evitando assim que tal resíduo seja descartado de maneira inadequada em rios e reduzindo a área necessária para a disposição desse material em aterros sanitários. Além disso, conforme mencionado por Godoy et al (2019), são escassos os trabalhos que utilizaram lodo de ETA localizadas no sul do Brasil como matéria-prima para a produção de materiais cimentícios suplementares. Os autores também destacam a importância da caracterização de lodos de ETA de diferentes locais para garantir que as propriedades do material calcinado possibilitem sua utilização como MSC, uma vez que a composição e as características químicas e físicas do lodo gerado variam de acordo com a localização da ETA.…”

Section: Introductionunclassified

Incorporação de lodo calcinado de estação de tratamento de água como material cimentício suplementar

et al. 2020

View full text Add to dashboard Cite

Resumo O lodo de estação de tratamento de água (ETA), principal resíduo gerado pelas atividades de potabilização da água, quando calcinado possui compostos químicos semelhantes aos encontrados nas matérias-primas cimentantes, viabilizando sua utilização como material cimentício suplementar (MCS). Este trabalho teve como objetivos: a) caracterização química e física do lodo calcinado a temperatura de 700 °C (LETAC) durante 1 hora, proveniente de uma ETA localizada em Venâncio Aires (RS); b) avaliação da influência da sua incorporação, em percentuais de 10% e 25% como MCS em pastas e em argamassas. Foram realizados ensaios microestruturais e mecânicos. Os resultados obtidos na calorimetria indicam que o resíduo apresenta efeito fíler e químico. A partir da análise termogravimétrica, verificou-se que a incorporação do lodo nas pastas de cimento promoveu um consumo de hidróxido de cálcio (redução de 40% na composição com 25% de LETAC) e consequente formação de C-S-H. Os resultados do DRX mostram que a quantidade de fases amorfas foi superior em 11% na pasta com 25% de LETAC, confirmando o desenvolvimento adicional de C-S-H. Quanto às propriedades mecânicas, não foram verificadas perdas significativas de resistência à compressão em pastas quando utilizado o resíduo em até 25% de substituição.

show abstract

Valorization of water treatment sludge waste by application as supplementary cementitious material

Cited by 68 publications

References 47 publications

Reuse of Water Treatment Sludge in Coagulation Process for the Treatment of Raw Water From River Nile

Reuse of Water Treatment Sludge in Coagulation Process for the Treatment of Raw Water From River Nile

Evaluation of the use of silica-alumina refractory waste as a supplementary cementitious material

Incorporação de lodo calcinado de estação de tratamento de água como material cimentício suplementar

Contact Info

Product

Resources

About