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In this study it is shown that addition of crude protein extract containing either membrane bound nitrate reductase (Nar) or periplasmic nitrate reductase (Nap) shortens the diauxic lag of denitrifying bacteria switched from aerobic to anoxic conditions. The specific growth rate under anoxic conditions, following resumption of e.. Read More
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The environmental problems of paper board industry are not limited by the high water consumption, generate wastewaters and solid wastes. This paper presents the paper board industry effluent treatment plant components performance and physio-chemical characteristics of wastewater and sludge. In ETP operation most important factor.. Read More
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Remediation of Escravous Crude Oil Contaminated Soil Using Activated Carbon from Coconut Shell
Environmental pollution is one of the major hazards facing humanity in the quest for energy today. In Nigeria, the activities of oil exploration and exploitation have repeatedly exposed the environment to the effect of hydrocarbon spill. This research work was carried out to investigate the potential of activated carbon produced.. Read More
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Potential of Salvinia molesta for Removal of Sodium in Textile Wastewater
Textile industries are one of the major contaminators of water and soil. Sodium is the only major cation present in textile wastewater due to high consumption of sodium salts in processing units. Many aquatic macrophytes are successfully used for phytoremediation of contaminated water. An attempt has been made to test the potent.. Read More
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Biobutanol Production from Lignocellulosic Biomass: Prospective and Challenges
Biobutanol production from lignocellulosic biomass is considered promising and economically feasible. This paper provides an updated review on development of lignocellulose-based biobutanol production with a focus on the understanding of the structure of the feedstock, pretreatment technologies, and fermentation processes. To en.. Read More
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In the eastern Africa sub-region, many industries discharge untreated effluents to nearby water resources, thereby polluting the environment. This is because the technologies applicable for wastewater treatment are expensive for these small-medium sized companies with low profit margins. Slaughterhouses belong to this category o.. Read More
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In vitro Comparison of Palm Oil Mill Effluent (POME) degradation was carried out using Bacillus subtilis, Pseudomonas aeruginosa and Aspergillus niger over a period of 16 days using POME as carbon source. pH, nitrate, phosphate, turbidity, and bacterial counts were carried out at intervals of 0, 4, 8, 12, and 16 days to assess t.. Read More
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An effective profenofos and λ-cyhalothrin degrading bacterium (strain DB17) was isolated from soil samples collected from Qassim region, Saudi Arabia. Based on the results of phylogenetic similarity of 16SrDNA gene sequences, strain DB17 was identified to be Pseudomonas putida. The isolate utilized profenofos and λ-cyh.. Read More
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Microalgal-Bacterial Consortium in Polyaromatic Hydrocarbon Degradation of Petroleum Based Effluent
The recurrent and indiscriminate discharge of flow stations' crude oil effluent has led to an increased polyaromatic hydrocarbons (PAHs) level in the environment. PAHs are high-priority environmental pollutants of significant human health concerns, thus considerable effort has been made in this study to biodegrade these PAHs usi.. Read More
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Densification of oil sand tailings deposited in the tailing ponds and recovering water from them are two major challenges in the oil sands surface mining industry. A small increase in the tailings settlement rate (which normally is very slow) can improve the densification of tailings and significantly reduce water consumption an.. Read More
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Vat dyes are aromatic compounds widely used for denim textile industries, this result in a great wastewater problem from this industry due to recalcitrant nature of these dyes. The active protein (ThrH) was purified from Pseudomonas aeruginosa by DEAE-Sepharose A-50 column chromatography and this 3D crystal structure was reporte.. Read More
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Use of Ecopiling to Remediate PAH-Contaminated Storm-water Lagoon Sediment
Polycyclic Aromatic Hydrocarbons (PAHs) are widely distributed in the environment originating from both natural and anthropogenic sources. Consequently, they are found ubiquitously in the lithosphere, hydrosphere, atmosphere and biosphere. They are of major concern due to their recalcitrant nature, ability to bio-accumulate and .. Read More
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Bioremediation potential of a combination of cow dung and a microbial consortium (Pseudomonas aeruginosa, Penicillium chrysogenum and Aspergillus niger) in soil contaminated with tannery effluent, was investigated in the laboratory. Concentrations of phenol, sulphide and ammonium nitrogen in contaminated soil, were significantly.. Read More
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Arsenic Occurrence, Ecotoxicity and its Potential Remediation
Arsenic levels in water, sediments, and biota of the estuaries and coastal ecosystems have been well documented. Natural and anthropogenic activities such as industrial offshore oil spills and groundwater pollution have increased its levels in natural water systems. This brief review provides a clear view on arsenic occurrence, .. Read More
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Foliar Nutrient Composition of 19 Tree Species Grown on a Phytocapped Landfill Site
An alternative landfill capping technique ‘Phytocapping’ (establishment of perennial plants on a layer of soil placed over the waste) was trailed at Rockhampton, Australia, as it is eco-friendly, less expensive and socially acceptable. In this capping, trees are used as ‘Bio-pumps and Screens’ and soil co.. Read More
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Estimation of the Seedling Vigor Index of Sunflowers Treated with Various Heavy Metals
In order to quantitatively describe the relative effect of the concentrations of heavy metals (i.e., Cd, Pb, Zn, and Ni) on the germination and seedling growth of plants, the seed germination tests were conducted using sunflower seeds treated with various heavy metals, and a mathematical model to estimate the seedling vigor inde.. Read More
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Residual Concentrations of Diazinon and Dursban and its Impacts on Soil and Carrot
At early growth stage after application of two pesticides, the growth of Carrot (Daucus carota L.) was enhanced but at middle and mature stages the growth rate was slowed down. At initial stage the response of uptake Diazinon ranged from 0.302 μg l-1 to 3.064 μg l-1 (Diazinon doses were 0.50 l ha-1, 1.00 ha-1, 2.00 l h.. Read More
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Remediation of crankcase oil contaminated soil with different sources of manure was studied using randomized complete block design with four treatments which were replicated five times. Oba super Π hybrid variety of maize was used as a test crop. Results showed significant (P<0.05) treatment effect on aggregate stability.. Read More
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The oasis of Quillagua is an As contaminated area located in the North part of Chile along the Rio Loa. This study was undertaken in order to quantify As accumulation in water, soil and plants of the xerohalophyte species Atriplex atacamensis growing along the river. The water samples from the Rio Loa contained up to 2.5 mg L-1 .. Read More
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In-situ Biological Water Treatment Technologies for Environmental Remediation: A Review
Water treatment technologies can be classified as in-situ or ex-situ technologies. In-situ biological techniques include the use of aquatic plants, aquatic animals, and microbial remediation. Approaches to alleviate surface water pollution should use bioremediation methods as a primary technique. These methods should be tested n.. Read More
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