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Integration of immersed membrane ultrafiltration with coagulation and activated carbon adsorption for advanced treatment of municipal wastewater.(Report)

Dialynas, E. ; Diamadopoulos, E.

Desalination, Sept 30, 2008, Vol.230(1-3), p.113(15) [Tạp chí có phản biện]

ISSN: 0011-9164

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  • Nhan đề:
    Integration of immersed membrane ultrafiltration with coagulation and activated carbon adsorption for advanced treatment of municipal wastewater.(Report)
  • Tác giả: Dialynas, E. ; Diamadopoulos, E.
  • Chủ đề: Sewage Treatment ; Adsorption ; Industrial Water Pollution
  • Là 1 phần của: Desalination, Sept 30, 2008, Vol.230(1-3), p.113(15)
  • Mô tả: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.desal.2007.11.020 Byline: E. Dialynas, E. Diamadopoulos Keywords: Ultrafiltration; Immersed membrane; Coagulation; Activated carbon adsorption; Tertiary treatment; Municipal wastewater Abstract: A pilot-scale hollow-fiber ultrafiltration unit was installed in the wastewater treatment plant of Rethymno, Crete, Greece. The system was fed with treated unchlorinated effluent. Three sets of experiments were conducted. At first, the UF pilot unit was operated as a direct filtration unit. During the second phase, ultrafiltration was combined with the addition of a coagulant (alum). The last phase of the experiments involved the addition of activated carbon (either powdered or granular) into the system. During direct filtration, the average COD removal was 19%, while the average DOC was removed to a similar extent (25%). Effluent turbidity was practically independent of the influent turbidity with an overall average removal of 90%. Faecal and total coliform were also removed efficiently reaching average removals of 99.94% and 99.96%, respectively. Removal of heavy metals in particulate form also took place. When ultrafiltration was combined with in-line coagulation, the results were similar to those exhibited without coagulation. Combining ultrafiltration with powdered activated carbon resulted in DOC removal as high as 60%. However, after the addition of the PAC, the transmembrane pressure increased rapidly due to the formation of PAC cake on the membrane surface. Application of granular activated carbon resulted in 36% reduction of DOC without causing an increase to the trans-membrane pressure. Heavy metals present in the secondary effluent were also removed very efficiently by the GAC in the UF tank. Author Affiliation: Department of Environmental Engineering, Technical University of Crete, 73100 Chania, Greece Article History: Received 18 June 2007; Accepted 9 November 2007
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0011-9164

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