TREATMENT OF HIGH STRENGTH WASTEWATER USING ANAEROBIC BAFFLED REACTOR WITH MEDIA DURING THE START UP PHASE
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Author(s): WALID ELBAKRI , AHMED S.KHALIL , MEDHAT A.E. MOUSTAFA
Abstract: Population growth and depletion of high quality fresh water supplies have led to an increased interest in wastewater reuse to augment potable water supplies either directly or indirectly so this paper presents a simple experimental set-up was used to study the treatability aspect of synthetic waste water. Three types of systems: i) conventional anaerobic baffled reactor (ABR (A)), ii) anaerobic baffled reactor with sponge bio-film (ABR (B)), iii) anaerobic baffled reactor with fiber bio-film (ABR (C)), where experimented under different COD (0-5000 mg/l) in the first steps, with flow rate 38 l/d and pH value 8.5. pH effect on treatability was also investigated. The main objective of this study was to investigate the behavior of three reactors and verify the use of bio-film in improving treatability, to promote theses the use of two types of bio-film sponge and fiber. Many significant factors were considered such as: temperatures, number of baffled in reactor, shape baffled and location
- Publication Date: 26-Oct-2014
- DOI: 10.15224/978-1-63248-030-9-50
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PUNCHING SHEAR STRENGTH OF STEEL FIBER REINFORCED HIGH STRENGTH CONCRETE
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Author(s): AREF ABADEL , HUSAIN ABBAS , TAREK ALMUSALLAM , YOUSEF AL-SALLOUM
Abstract: This paper investigates the punching shear behavior of steel fiber reinforced concrete (SFRC) slabs. Experiments involved the testing of four SFRC and two control slabs against a punching load applied through a steel rod. The slabs were 600 mm square, 90 mm thick reinforced with 8 mm diameter steel rebars. SFRC was produced by mixing 1.2% and 1.4% hooked ended steel fibers in plain high strength concrete of 64.5 MPa grade. Effect of steel fibers on the punching shear cracking behavior and resistance of the slabs was investigated. The results show a significant increase in the punching shear capacity (34%) and considerable improvement in the cracking behavior. The failure of control slabs was brittle, while the SFRC slabs failed in a ductile manner. At serviceability limit state, significant reduction in the average crack width of the SFRC slabs was observed.
- Publication Date: 26-Oct-2014
- DOI: 10.15224/978-1-63248-030-9-49
- Views: 0
- Downloads: 0