Strategic pathways for the sustainable management of water treatment plant residuals

Walsh, Margaret E.; Lake, Craig B.; Gagnon, Graham A.

doi:10.1139/s07-034

Cited by 16 publications

(8 citation statements)

References 22 publications

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“…The common solutions for managing water treatment residuals are to direct the wet residuals to a wastewater treatment plant through a sewer connection, or to treat the wet residuals on-site to reduce the water content and subsequently direct the residual solids to a municipal landfill (Cornwell et al 2000). In the latter case, transportation of the dewatered residuals to a landfill and landfill tipping fees can represent a significant cost to the utility (Walsh et al 2008). The treatment and disposal of these residual solids has become an integral part in the operation and management of water treatment facilities due to stringent local, state and federal regulations (Cornwell et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus adsorption on water treatment residual solids

Gibbons

Mortula

Gagnon

2009

Journal of Water Supply: Research and Technology-Aqua

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The treatment and disposal of water treatment plant residual solids has become an increasingly important environmental priority for drinking water utilities. This study examines water treatment residual solids (WTRSs) from four North American water treatment plants to determine the role that coagulant types play in phosphate adsorption by the residual solids. In total, two alum residual solids (one solid from a plant that has a raw water with low alkalinity and one solid from a plant that has a raw water with high alkalinity), one lime residual solid and one ferric residual solid were used in batch adsorption experiments with deionized water at a pH of 6.2^0.2 and secondary municipal wastewater effluent at a pH of 6.8. Langmuir isotherm modeling showed that ferric residuals had the highest adsorptive capacity for phosphate (Q max ¼ 2,960 mg/kg), followed by lime (Q max ¼ 1,390 mg/kg) and alum (Q max ¼ 1,110 mg/kg and 1,030 mg/kg) for adsorption experiments with P-spiked deionized water. Of the two alum residuals, the residual with a higher weight percent of metal oxides had a higher adsorptive capacity. The ferric residuals were less affected by competing species in the wastewater effluent, while the lime and alum residuals had a higher rate of phosphate removal from the deionized water compared to the wastewater effluent. Overall, ferric water treatment residuals were the best adsorbent for phosphate adsorption, followed by lime and alum residuals.

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Section: Introductionmentioning

confidence: 99%

Phosphorus adsorption on water treatment residual solids

Gibbons

Mortula

Gagnon

2009

Journal of Water Supply: Research and Technology-Aqua

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“…Se o objetivo for o aproveitamento da infraestrutura de tratamento de lodo da ETE, a alternativa mais racional seria um lodo-duto, pois senão estar-se-ia concentrando as impurezas no lodo da ETA, diluindo com o esgoto sanitário e depois concentrando no lodo da ETE. Da mesma forma, o reciclo direto da água de lavagem dos filtros, sem nenhum pré-tratamento, não é recomendado quando a água bruta contém metais pesados, compostos orgânicos tóxicos (pesticidas, fármacos, etc) ou protozoários oportunistas (WALSH et al, 2008). Além disso, há restrições para tal reciclo quando se faz uso de polímeros orgânicos sintéticos à base de poliacrilamida no processo de tratamento de água.…”

Section: Introductionunclassified

Uso benéfico de lodo de estações de tratamento de água e de tratamento de esgoto: estado da arte

Urban¹,

Isaac²,

Morita³

2019

RDAE

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Especialistas atualmente concordam que a abordagem tradicional de gerenciamento de resíduos sólidos com foco no final da etapa do processo produtivo (abordagem linear) não é suficiente num cenário com restrição cada vez maior de recursos naturais e financeiros. Assim, as novas estações de tratamento de água (ETAs) e de esgoto (ETEs) devem ser projetadas levando em consideração a prioridade na gestão e no gerenciamento dos resíduos sólidos, preconizada pela política brasileira, da Europa, do Japão e da China: a não geração, a redução, a reutilização, a reciclagem, o tratamento dos lodos e a disposição final apenas dos rejeitos. Para as ETAs e ETEs existentes, usos benéficos devem ser priorizados sobre as formas de transferência ou de disposição final. Neste artigo, diversos usos de lodos de ETAs e ETEs são apresentados e discutidos em relação ao seu potencial de aplicação. Conclui-se que a maioria das pesquisas é realizada em escala de laboratório e não se avalia a viabilidade ambiental. Nos países em desenvolvimento, ainda é incipiente o uso de lodos, o que não acontece nos desenvolvidos, que tornaram o uso benéfico uma realidade há mais de uma década. É importante destacar também que não basta verificar a viabilidade técnica e ambiental do uso pretendido para que ele seja aplicado em escala real, pois os problemas logísticos, a relação custo-benefício e o atendimento aos interesses e restrições de cada ator envolvido no processo influenciam significativamente. Palavras-chave: Resíduos de tratamento de água. Resíduos de tratamento de esgoto. Reúso de lodo. Resíduos sólidos. Gerenciamento integrado de resíduos.

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“…Technologies for recovering water from washings discharged from water treatment stations have been used in Poland and all over the world for many years [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The Study of Possibilities for Reuse of Washings from Swimming Pool Circulation Systems

Wyczarska-Kokot

2016

Ecological Chemistry and Engineering S

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Swimming pools are very expensive, in terms of operation, sports facilities. Therefore, investors and managers of these facilities are looking for methods of reducing the costs of their use. One of the proposed methods is the managing of washings previously discharged to the sanitary sewage system. The assessment of possibilities for reuse of washings from swimming pool filtration system is based on the limits of basic indicators of pollutants in wastewater discharged to water and soil (temperature, pH, TSS, BOD5, COD, TN, TP, free chlorine). The conducted research of washings quality from 26 tested swimming pools have shown that washings quality is dependent on the operating conditions of the pool circuit, including the filter cycle duration and types of filter bed. A direct discharge to water or soil may be impossible due to excessive amounts of total suspended solids (above 35 mg/dm 3 ) and free chlorine concentration (above 0.2 mg Cl2/dm 3 ). However, the quality of supernatant water of washings subjected to sedimentation in the laboratory shows that the washings are suitable for reuse. The installation of settling tanks in swimming pool facilities could relieve the sewage systems and allow for the discharge of supernatant water to surface waters or for the irrigation of green areas in an environmentally friendly way.

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Strategic pathways for the sustainable management of water treatment plant residuals

Cited by 16 publications

References 22 publications

Phosphorus adsorption on water treatment residual solids

Phosphorus adsorption on water treatment residual solids

Uso benéfico de lodo de estações de tratamento de água e de tratamento de esgoto: estado da arte

The Study of Possibilities for Reuse of Washings from Swimming Pool Circulation Systems

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