REHABILITATION OF A WASTEWATER TREATMENT PLANT
Author(s): Barreto, M. P. and Torres, I.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
Publication year: 2015
Total Pages: 7
Abstract: Biogas is produced at various stages in the organs of wastewater treatment plants (WWTP), particularly those who are in contact with mud: primary and secondary sedimentation tanks, with emphasis on the biodigestors, principal organ of sludge treatment. The chemical composition of biogas is mainly CH4 (≈ 68%), CO2 (≈ 29%), H2S (≈0.02%) epH (≈6/7).
During the process of biological treatment of wastewater treatment plant is naturally produced biogas whose composition includes the presence of sulphur dioxide, H2S. This
component is a highly corrosive gas and it is the major responsible for appearance of
pathologies in various elements of these WWTP. It attacks mainly metallic elements such as reinforcement, piping and other equipment of these installations.
Consequently, this gas in the absence of appropriate preventive measures may cause an increased number of maintenance and rehabilitation interventions in infrastructure, with increased costs in the respective repairs.
There are numerous situations of sanitation infrastructures where there is the presence of pathologies associated with biogas, which will have necessarily to suffer rehabilitation works with some wingspan.
This paper will present a case study of structural rehabilitation of organs of a WWTP (in biodigestors), including the diagnosis of the observed pathologies, its origin and the rehabilitation solutions adopted.
This case study ends with a description of the work performed and the materials that were carefully studied for technical solutions employed.
Online publication: 2015
Publication Type: full_text
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