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The aim of this study was to determine the optimum levels of nutrients for the production of phytase by heat stressed Rhizopus oryzae in submerged fermentation. Plackett-Burman Design (PBD) was initially adopted for evaluating the medium components (mannitol, K2HPO4, Na2HPO4 and sodium phytate) affecting the phytase production m.. Read More
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Generation of Biogas from Cow Dung
Four sets of 250 ml conical flasks (A-D), each containing two flasks, were used in triplicates as digesters to determine the possibility of laboratory-scale biogas production from cow dung under four different treatments. Equal volumes of slurry (3 g dung: 10 cm3 water) in the digesters were subjected to anaerobic digestion over.. Read More
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Reactor neutron activation analysis was applied to characterize the elemental content of a microbial biomass in the process of synthesis of silver and gold nanoparticles from silver nitrate and chloroauric acid solutions. It was established that this process is accompanied by redistribution of some essential elements s.. Read More
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An investigation was carried out to analyze Physicochemical parameters like colour, odour, pH, electrical Conductivity (EC),Total suspended dolids (TSS), Total dissolved Solids (TDS), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), chromium and copper of untreated tannery effluent and to degrade the effluent using.. Read More
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Biological Approach for the Treatment of Pulp and Paper Industry Effluent in Sequence Batch Reactor
Pulp and paper industrial effluent is rich in recalcitrant compounds and causes pollution. For the treatment of such compounds activated sludge process is frequently used in which F/M ratio is kept low. This treatment results in effective biochemical oxygen demand removal but other waste water parameters are not reduced effectiv.. Read More
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A New Biological Pretreatment Method for Enhancing Cellulase Performance
Introduction: Only a few bacteria capable of degrading lignin have been reported. Of these bacteria, Bacillus sp. is very useful because this soil bacterium can divide asymmetrically, producing an endospore that is resistant to environmental factors such as heat, acid, and salt for long periods of time. This manuscript suggests .. Read More
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Azo dyes are a wide spread class of poorly biodegradable industrial pollutants.The process of optimization of degradative potential is certainly a challenging task for its industrial applicability. In our current studies; we tried to understand whether azoreductases enzyme plays a significant role in textile dye degradation proc.. Read More
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Microbial Degradation of Gasoline in Soil: Comparison by Soil Type
During the investigation of a suspicious fire, debris is often collected from the scene and analyzed for residues of ignitable liquids (e.g., gasoline). In cases where the debris is contaminated with soil, it is known that heterotrophic soil microorganisms can alter the chemical composition of the ignitable liquid residue over t.. Read More
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Biodegredation of Reactive and Reactive Disperse Dyes by Aspergillius nigar
The purpose of this paper is to irradiate the dyes by biologically through utilization involve the use of microorganisms such as Aspergillius nigar 1, 2, 3. We have previously synthesised the dyes used, namely, bisazo bifunctional bismonochlorotriazine reactive dyes and reactive disperse dye. The study confirms the potentially o.. Read More
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Isolation and Characterization of Gasoline-Degrading Yeasts from Refined Oil-Contaminated Residues
Hydrocarbon-degrading yeasts were isolated from three sites contaminated with products of refined petroleum originating from an oily residue treatment Brazilian company. A selective enrichment technique was used by supplementing medium with gasoline, which resulted in eleven isolates; two identified as Rhodotorula mucilaginosa, .. Read More
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Several bacterial species (n=13) were isolated from electroplating wastewater to assess their ability to biodegrade free cyanide (F-CN). A mixed culture mainly dominated by Bacillus sp (Bacillus safensis, Bacillus lichenformis and Bacillus tequilensis) was cultured in nutrient broth for 48 hours at 37°C, to which F-CN as KC.. Read More
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Biodegradation of Fresh and Used Engine Oils by Pseudomonas aeruginosa LP5
Pseudomonas aeruginosa strain LP5, a hydrocarbon degrader isolated from petroleum contaminated soil based on its ability to grow on pyrene, was used to degrade two different grades of fresh and used engine oil (SAE 40W and SAE 20W 50) in liquid cultures. The organism degraded more than 90 percent of all oil types within 21 days .. Read More
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Dynamics Phytoremediation of Zn and Diesel Fuel in Co-contaminated Soil using Biowastes
In phytoremediation of co-contaminated soil, developing strategies is a major challenge for simultaneous and efficient remediation of multiple pollutants. A lab-scale experiment was set up to investigate the efficiency of adding 5% (w/w) individually of three different organic waste amendments [tea leaves, soycake and potato ski.. Read More
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In the coastal environment of the Todos Santos Bay (Ensenada BC, Mexico), the sport fishing dock is chronically polluted due to frequent anthropogenic activity. The presences of aliphatic hydrocarbons in surface hydrocarbon-rich wastewater from this Bay reflect the differences in industrial and domestic pollutant activities. In .. Read More
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Aspergillus niger has been tested in a discontinuous process for the pretreatment of fresh green Table Olive Processing Waste waters (TOPW). The influence of seven factors like incubation time, initial pH, dilution, glucose, agitation, (NH4)2SO4 and inoculum size on decolorization was screened by employing a fractional factorial.. Read More
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Nitrifying bacteria plays a major role in converting the waste water to valuable renewable resources for the society. Ammonia is the toxic excretory product of most aquatic organisms and nitrite formed by the oxidation of ammonia is also toxic. Ammonia oxidizing bacteria converts ammonia to nitrite and Nitrite oxidizing bacteria.. Read More
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Mathematical Modeling in Anaerobic Digestion (AD)
Anaerobic digestion (AD) of biowastes is the most conventional way to produce methane-rich biogas, which has great potential to replace the fossil fuel used in multiple applications, like vehicular transportation. Many countries and companies are involved in the design and construction of AD systems. Both efficient and economica.. Read More
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Environmental contamination by organics such as polycyclic aromatic hydrocarbons (PAHs) generally changes native microbial communities. However our understanding of microbial responses has been limited to short term studies (i.e., less than 2-3 years) so long term community responses are not as well understood. In 1996, the gene.. Read More
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There is widespread interest in Jatropha curcas L. as a renewable source of biodiesel and a potential replacement for petroleum-based transportation fuels. As an oil-bearing feedstock it displays rapid growth and high seed yield across soils of varying fertility. Unfortunately, despite current optimism there exists little inform.. Read More
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Plant biomass represents the major source for renewable bio-fuels. Cell walls constitute the major portion of plant biomass. The main challenge in sustainable production of ligno-cellulosic biofuel is overcoming the cell wall recalcitrance barrier. A number of cell wall components including lignin and hemicelluloses have been sh.. Read More
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