Anaerobic treatment of olive mill wastes in batch reactors

Bayramoğlu, Tuba Hande
Anaerobic treatment of olive oil mill wastes, namely black water and prina, was investigated in batch reactors. Biochemical methane potential (BMP) tests were conducted to determine the anaerobic biodegradability of black water and/or prina. With these BMP tests the biodegradability of olive mill wastes (OMWs) at different initial chemical oxygen demand (COD) concentrations and corresponding methane gas productions were investigated. Furthermore, a screening study was performed to determine the most important nutrients for the anaerobic digestion of black water. The results indicated that OMWW could be treated anaerobically with high efficiencies (85.4–93.4%) and treatment of 1 l olive mill waste waters (OMWW) by anaerobic methods resulted in production of 57.1±1.5 l of methane gas. Anaerobic treatment of the olive mill residual solids (OMRS) alone was poor; however, when OMRS was mixed with OMWW in certain ratios, OMRS could be treated efficiently under anaerobic conditions. Anaerobic cultures needed an adaptation period of 15–25 days for treatment of OMRS with and without OMWW.
Process Biochemistry


Mechanistics of nickel sorption by activated sludge
Arican, B; Gokcay, CF; Yetiş, Ülkü (Elsevier BV, 2002-06-01)
Biomass from activated sludge reactors operating at different dilution rates (0.09, 0,16, and 0.24/h) was used to examine the effect of sludge age on Ni2+ removal characteristics, running batch adsorption tests. The kinetic studies have revealed that sludge grown at all dilution rates, exhibits both active and passive uptake of Ni2+. Although percentages of active and passive uptake changed with the age of activated sludge biomass, passive uptake was the dominant mechanism in Ni2+ sorption. The data obtaine...
Ammonia removal from anaerobically digested dairy manure by struvite precipitation
Uludag-Demirer, S; Demirer, Göksel Niyazi; Chen, S (Elsevier BV, 2005-12-01)
Ammonia is one of the most important contaminants impairing the quality of water resources. When this is considered along with the fact that the global demand for nitrogenous fertilizers is in constant rise, the need for recovery as well as removal of nitrogen is well justified. Crystallization of N and P in the form of struvite (MgNH4PO4 center dot 6H(2)O), which is a slow releasing and valuable fertilizer, is one possible technique for this purpose. This study investigated the removal of NR4+ through stru...
TUKENMEZ, I; OZILGEN, M; BICER, A (Elsevier BV, 1991-11-01)
Rumen microorganisms were used in a batch fermentor to investigate whether they could be used to produce acetic acid, propionic acid, butyric acid, and methane from cotton fibers. The kinetics of product formation were studied with the initial medium pH values of 6.0, 7.0, and 8.0. Propionic acid, butyric acid, and methane production were growth associated; acetic acid production was found to be nongrowth associated. The largest amounts of bacteria and protozoa were attained with the initial pH of 7.0. T...
Avicel-adsorbable endoglucanase production by the thermophilic fungus Scytalidium thermophilum type culture Torula thermophila
Arifoglu, N; Ögel, Zümrüt Begüm (Elsevier BV, 2000-11-01)
Scytalidium thermophilum type culture Torula thermophila was isolated from mushroom compost and the total cellulase, endoglucanase, Avicel-adsorbable endoglucanase activities, as well as the fungal biomass generation and cellulose utilisation were analyzed in shake flask cultures with Avicel (microcrystalline cellulose) as the carbon source. Results were compared with an industrial strain of Scyalidium thermophilum type culture Humicola insolens. The pH and temperature optima for endoglucanase activities du...
Kinetics of riboflavin production by Brewers' yeasts
Tamer, I.M.; Özilgen , Mustafa; Ungan, Suat (Elsevier BV, 1988-12)
The kinetics of riboflavin production by Saccharomyces cerevisiae and Saccharomyces carlsbergensis in synthetic media and wort were studied. The results indicated that riboflavin was produced by growing cells only. Riboflavin production rate was proportional to growth rate of the yeasts in the exponential phase. Riboflavin was depleted in the stationary phase. The depletion rate was expressed with a first-order kinetic expression in yeast concentration. The kinetics of substrate utilization and ethanol prod...
Citation Formats
T. H. Bayramoğlu and G. N. DEMİRER, “Anaerobic treatment of olive mill wastes in batch reactors,” Process Biochemistry, pp. 243–248, 2000, Accessed: 00, 2020. [Online]. Available: