Effect of clay pretreatment on photofermentative hydrogen production from olive mill wastewater

Eroglu, Ela
Eroglu, Inci
Gündüz, Ufuk
Yuecel, Meral
The aim of this paper was to gain further insight into the effect of the clay pretreatment process oil photofermentative hydrogen production. This two-stage process involved a clay pretreatment step followed by photofermentation. which was performed under anaerobic conditions with the illumination by Tungsten lamps. Rhodobacter sphaeroUts O.U.001 was used for photofermentation. Higher amounts of color (65%), total phenol (81%) and chemical oxygen demand (3%) removal efficiencies were achieved after clay pretreatment process. During photofermentative hydrogen production with the effluent of clay pretreatment process, the main organic compounds resulting higher hydrogen production rates were found to be acetic, lactic, propionic, and butyric acids. Compared to photofermentation using raw olive mill wastewater (16 L-H2/L-OMW), the amount of photofermentative hydrogen production was doubled by using the effluent of the clay pretreatment process (31.5 L-H2/L-OMW). The reasons for the improvement of hydrogen production by clay treatment call be attributed to the high removal of the hardly biodegradable compounds such as phenols; minor removal of organic acids, sugars and amino acids that are known to enhance photofermentative hydrogen production; and the color depletion of raw OMW which might cause a shadowing effect on the photosynthetic bacteria.


Effect of iron and molybdenum addition on photofermentative hydrogen production from olive mill wastewater
Eroglu, Ela; Gündüz, Ufuk; Yucel, Meral; Eroglu, Inci (2011-05-01)
Photofermentative hydrogen production from olive mill wastewater (OMW) by Rhodobacter sphaeroides O.U.001 was assessed under iron and molybdenum supplementation. Control cultures were only grown with 2% OMW containing media. The analysis included measurements of biomass accumulation, hydrogen production, pH variations of the medium, and changes in the chemical oxygen demand (COD) of the wastewater. Growth under control and Mo-supplemented experiments yielded about the same amount of biomass (similar to 0.4 ...
Effect of clay on crude oil combustion by thermal analysis techniques
Kök, Mustafa Verşan (Springer Science and Business Media LLC, 2006-05-01)
This research was aimed to investigate the role of clay on the combustion and kinetic behavior of crude oils in limestone matrix. For this purpose, simultaneous TG (thermogravimetry) and DTA (differential thermal analysis) experiments were performed at three different heating rates as 10-15 and 20 degrees C min(-1), respectively. A uniform trend of decreasing activation energies was observed with the addition of clay. It was concluded that clays surface area affects the values of Arrhenius constant, while i...
Effect of different clay concentrations on crude oil combustion kinetics by thermogravimetry
Kök, Mustafa Verşan (2010-03-01)
The objective of this research was to investigate the effect of different clay composition and concentrations on the thermal behaviour and kinetics of heavy crude oil in limestone matrix by thermogravimetry (TG/DTG). In TG/DTG experiments, three distinct reaction regions were identified in all of the crude oil + limestone mixture known as low temperature oxidation (LTO), fuel deposition (FD) and high temperature oxidation (HTO) respectively. Addition of clay to porous matrix significantly affected the react...
Treatment of olive mill wastewater by different physicochemical methods and utilization of their liquid effluents for biological hydrogen production
Eroglu, Ela; Erolu, Inci; Gündüz, Ufuk; Yucel, Meral (2009-04-01)
in this study various two-stage processes were investigated for biological hydrogen production from olive mill wastewater (OMW) by Rhodobacter sphaeroides O.U.001. Two-stage processes consist of physicochemical pretreatment of OMW followed by photofermentation for hydrogen production. Explored pretreatment methods were chemical oxidation with ozone and Fenton's reagent, photodegradation by UV radiation, and adsorption with clay or zeolite. Among these different two-stage processes, strong chemical oxidants ...
Effects of compaction moisture content on the shear strength of an unsaturated clay
Çokça, Erdal; Armangil, F. (2004-05-12)
This paper deals with the results of an experimental study carried out on compacted clay (PL=23%) to investigate the influence of compaction water content on the shear strength of the clay. For the measurement of shear strength parameters, direct shear tests were done on samples compacted at optimum moisture content (i.e. w=24%), at the dry side of optimum (i.e. w=18%, 20% and 22%) and at the wet side of optimum (i.e. w=26% and 28%). Thermocouple psychrometers were used for suction measurements and the suct...
Citation Formats
E. Eroglu, I. Eroglu, U. Gündüz, and M. Yuecel, “Effect of clay pretreatment on photofermentative hydrogen production from olive mill wastewater,” BIORESOURCE TECHNOLOGY, pp. 6799–6808, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30794.