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Contribution of wastewater irrigation to Soil Transmitted Helminths infection among vegetable farmers in Kumasi, Ghana
(National Centre for Biotechnology Information, 2016-12-06)Wastewater irrigation is associated with several benefits but can also lead to significant health risks. The health risk for contracting infections from Soil Transmitted Helminths (STHs) among farmers has mainly been ... -
Linear Quantum Entropy and Non-Hermitian Hamiltonians
(MDPI, 2016-12-16)We consider the description of open quantum systems with probability sinks (or sources) in terms of general non-Hermitian Hamiltonians. Within such a framework, we study novel possible definitions of the quantum linear ... -
Synthesis of biodiesel from Scenedesmus sp. by microwave and ultrasound assisted in situ transesterification using tungstated zirconia as a solid acid catalyst
(Elsevierhttp://www.sciencedirect.com/science/article/pii/S0263876214002226, 2014-05-20)Oleaginous Scenedesmus sp. was cultivated phototrophically in an open pond for biofuels production. The culture was harvested and subsequently dewatered and dried. The chemical properties of the Scenedesmus sp. lipids were ... -
Evaluation of operating conditions for sustainable harvesting of microalgal biomass applying electrochemical method using non sacrificial electrodes
(Elsevierhttp://www.sciencedirect.com/science/article/pii/S0960852414016162, 2015)The efficient harvesting of microalgae is considered to be one of the challenging steps of algal biofuel pro-duction and a key factor limiting the commercial use of microalgae. To overcome the limitation of metal-lic ... -
Thermal behavior and pyrolytic characteristics of freshwater Scenedesmus sp. biomass
(Taylor and Francis, 2015)Thermal behavior and pyrolytic characteristics of Scenedesmus sp. biomass was investigated under five different heating rates of 5, 10, 20, 30, and 40°C/min by using thermogravimetric analysis. The calorific value and ... -
Class frequency distribution for a surface raw water quality index in the Vaal Basin
(South African Water Research Commission, 2014-04-02)A harmonised in-stream water quality guideline was constructed to develop a water quality index for the Upper and Middle Vaal Water Management Areas, in the Vaal basin of South Africa. The study area consisted of 12 water ... -
The optimization of biomass and lipid yields of Chlorella sorokiniana when using wastewater supplemented with different nitrogen sources.
(Pubmedhttp://www.sciencedirect.com/science/article/pii/S0960852414003691#, 2014-09)The potential of nitrogen sources supplementing domestic wastewater for the cultivation of microalgae was assessed. Urea, potassium nitrate, sodium nitrate and ammonium nitrate were evaluated for their effect on cultivation ... -
Pathways of 3-biofules (hydrogen, ethanol and methane) production from petrochemical industry wastewater via anaerobic packed bed baffled reactor inoculated with mixed culture bacteria
(Elsevierhttps://www.researchgate.net/publication/303607715_Pathways_of_3-biofules_hydrogen_ethanol_and_methane_production_from_petrochemical_industry_wastewater_via_anaerobic_packed_bed_baffled_reactor_inoculated_with_mixed_culture_bacteria, 2016)Simultaneous production of 3-biofuels (hydrogen, ethanol and methane) as by-products of the biodegra-dation of petrochemical wastewater containing MEG via anaerobic packed bed baffled reactor (AnPBBR), was extensively ... -
Assessment of brewery effluent composition from a beer producing industry in KwaZulu-Natal, South Africa
(PSP, 2014)The objective of the study was to assess the physico-chemical composition and process variations of the effluent from a brewery industry located in KwaZulu - Natal, South Africa during the months of September 2011 to May ... -
Evaluation of phytotoxicity effect on selected crops using treated and untreated wastewater from different configurative domestic wastewater plants
(Taylor and francis Onlinehttp://www.tandfonline.com/doi/full/10.1080/09593330.2015.1132776, 2016)This study investigated the phytotoxicity effect of untreated and treated wastewater collected from two different configurations of domestic wastewater treatment plants in South Africa. The phytotoxicity effect on vegetable ... -
Ecosystem-specific water quality indices
(NISC (Pty) Ltd and Taylor & Francishttp://www.tandfonline.com/doi/abs/10.2989/16085914.2015.1054341, 2015)The water quality index (WQI) has emerged as a central tool for analysing and reporting quality trends since 1965. It provides a better overview of water quality variability in a catchment than conventional monitoring ... -
Understanding multiple species ecosystem dynamics using a consumer resource model
(Wiley, 2016)Most ecological systems comprise multiple species coex-isting and the dynamics of these multiple species can be important for understanding, management, and conservation. One method to study such ecological system dynamics ... -
Consumption threshold used to investigate stability and ecological dominance in consumer-resource dynamics
(Elsevierhttp://ac.els-cdn.com/S0304380015001581/1-s2.0-S0304380015001581-main.pdf?_tid=8e9e4688-ffda-11e6-8ca3-00000aab0f02&acdnat=1488522664_45521cf64463e74d1d299abf618bbaec, 2015)Understanding consumer resource population dynamics can be important to an understanding of the overall ecology of systems. For example, the tree-grass continuum dynamics of savannas, an important ecological biome, is ... -
Optimal control of maize foliar diseases using the plants population dynamics
(Taylor and Fancishttp://www.tandfonline.com/doi/abs/10.1080/09064710.2015.1061588?journalCode=sagb20, 2015-09-28)Pathogens and insects can have important negative effects on yields of crops cultivated by humans. These effects can be important for the food security or financial well-being of individuals. In particular, maize is a very ... -
Anaerobic digestion model to enhance treatment of brewery wastewater for biogas production using UASB reactor
(Springerlinkhttp://link.springer.com/article/10.1007/s10666-015-9457-3, 2015)Biogas produced from an upflow anaerobic sludge blanket (UASB) reactor is a clean and an environmentally friendly by-product that could be used to meet partial energy needs. In this study, a modified methane generation ... -
Continuous biohydrogen production from starch wastewater via sequential dark-photo fermentation with emphasize on maghemite nanoparticles
(Elsevierhttp://www.sciencedirect.com/science/article/pii/S1226086X14001658, 2015)Hydrogen production from starch wastewater via sequential dark-photo fermentation process was investigated. Two anaerobic baffled reactors (ABRs) were operated in parallel at an OLR of 8.11 0.97 g-COD/L/d, and a HRT of ... -
Identifying stability conditions and Hopf bifurcations in a consumer resource model using a consumption threshold
(Elsevier, 2016)The existence, or not, of cyclic dynamics is one of the pivotal aspects of ecological populations. This work considers a consumer resource model found in ecology that can describe both cyclic and non-cyclic dynamics depending ... -
Quantum-statistical approach to electromagnetic wave propagation and dissipation inside dielectric media and nanophotonic and plasmonic waveguides
(American Physical Society, 2016)Quantum-statistical effects occur during the propagation of electromagnetic (EM) waves inside the dielectric media or metamaterials, which include a large class of nanophotonic and plasmonic waveguides with dissipation and ... -
Non-Hermitian Hamiltonian Approach for Electromagnetic Wave Propagation and Dissipation tn Dielectric Media
(IEEEhttp://ieeexplore.ieee.org/abstract/document/7538192/, 2016-06)Using the formal analogy between a certain class of Maxwell equations and the Schrdinger equation, we derive the effective Hamiltonian operator that governs the propagation of electromagnetic (EM) wave modes inside ... -
Quantum entropy of systems described by non-Hermitian Hamiltonians
(IOP Sciencehttp://dx.doi.org/10.1088/1742-5468/2016/03/033102, 2016-03-02)We study the quantum entropy of systems that are described by general non-Hermitian Hamiltonians, including those which can model the effects of sinks or sources. We generalize the von Neumann entropy to the non-Hermitian ...
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