International Journal of Environment and Waste Management (Int J Environ Waste Manag )


IJEWM is a refereed reference and authoritative source of information in the field of environmental and waste management Together with its sister publications IJEP, IJETM and IJGEnvI, it provides a comprehensive coverage of environmental issues. It covers both engineering/technical and management solutions.

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    International Journal of Environment and Waste Management website
  • Other titles
    Int. j. environment and waste management, IJEWM
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    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: The paper is a comprehensive review of the last five years literature to provide the current status of H2 production through anaerobic digestion of industrial waste. Hydrogen production through dark fermentation is still far from industrial application. More research is needed to overcome the metabolic limitation and increase H2 yield, rate, and substrate-to-H2 conversion efficiency in a stable process. Generally, studies on effects of culture pretreatment are contradictory and lacked energy and cost analysis in their evaluation. More studies are expected to appear on two-stage and integrative systems of various H2 and other biofuels or value-added chemicals bioprocesses. Metabolic modeling, metabolic engineering, and molecular biology aspects of the microbial community are the current research areas for H2 production through dark fermentation and a coordinative research agenda is required to integrate them into a goal-directed plan. Investment and funding of research are the major drives needed to achieve a milestone.
    International Journal of Environment and Waste Management 01/2015;
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    ABSTRACT: One of the main problems of current socio-economic activities in Indonesia is how to deal with the increasing amounts of household waste generated in urban areas. This paper discusses the main issues of the current management of household waste in Indonesia and analyses its socio-economic factors as well as introduces a new strategy to utilise and reduce household waste for current and future generations. Many large cities in Indonesia are suffering from severe problems caused by disorderly household waste handling and require an integrated management approach involving various players. The paper addresses the implementation of 3R activities by the Ministry of Environment, Ministry of Public Work and Society. The study found that the introduction of biomass, pollutant and waste treatment sectors with proper advanced technologies will reduce waste generation and CO2 emissions. The study also suggests that the coordination between regional governments and political commitment are necessary and that the Indonesian Government should be open-minded about new ways to comprehensively deal with all types of waste.
    International Journal of Environment and Waste Management 01/2015; 15(1).
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    ABSTRACT: A new method based on a dimensionless analysis of the BOD first order model is used to determine the model coefficients (k and L). Curves for the theoretical first order model for the first five days of BOD divided by the theoretical BOD5 for different k values are drawn. The experimental BOD1 through BOD5 are made dimensionless by dividing them with the experimental BOD5. These values are connected smoothly using cubic spline method and MATLAB. The area below these cubic spline equations is compared to the area below the theoretical curves for different k values. The curve with the same area below it as that with the cubic spline curves is used for the determination of k and L values. The closeness of the experimental data to the first order model is easier to observe in this method. Data from the literature have proven the validity of the new method.
    International Journal of Environment and Waste Management 12/2014; 14(4):376-391.
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    ABSTRACT: The risk of fires at municipal solid waste (MSW) storage sites is of great concern because such fires not only result in material losses worth millions of Euros annually but also have deleterious effects on both human health and the environment. Keeping in view that management decisions addressing risk of fires cannot be divorced from human psychology regarding safety, a questionnaire survey was designed for which 187 respondents gave a response rate of 33%. Survey results showed that three types of biases; optimism, attribution and availability bias, prevail among managers of waste management companies. Furthermore biased respondents had experienced higher frequency of fire incidents and preferred low cost risk averting technologies. It is concluded that there is a need to acknowledge the existence of biases and to improve the decision making skills of managers with the help of risk awareness programs and implementation of government steering tools to reduce risk of spontaneous fires.
    International Journal of Environment and Waste Management 09/2014; 14(2):16.
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    ABSTRACT: Improvement of collection operation by route optimization is complex and time consuming. This study illustrates the application of an efficient and high speed optimization software; Premium Solver Platform V.12 to optimize tours for the collection of municipal solid waste in Ilorin, Nigeria. Data required for optimization was obtained from the municipal solid waste management authority, field studies and digitized map of Ilorin. Thereafter the optimization problem was then formulated as a travelling salesman problem (TSP) on a Microsoft Excel spreadsheet. The solver engine of the software generated optimal result for the TSP in less than 1 second for each computer run and the overall output showed reduction in the tour distance by 0.27 to 32.16 %. This reduction could in turn decrease time, costs and emissions associated with collection operation. The method proposed in this study can also generate accurate decisions within a short period for large routing problems especially in mega cities.
    International Journal of Environment and Waste Management 08/2014; 14(3):222-231.
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    ABSTRACT: In this study, Al-Qateef wastewater treatment plant was selected as a case representing the upgrade of carrousel technology with tertiary treatment. This technology is applied in many cities in the Eastern province, Kingdom of Saudi Arabia. The use of chemical treatment alternative for phosphorous removal was evaluated versus the newly implemented tertiary treatment unit. The study showed that chemical phosphorous removal has an additional advantage of reducing the final effluent total phosphorus concentration to less than 1 mg/L at an alum dose of 50 mg/L without any significant alteration of the expected final effluent quality that could be achieved by the newly installed sand filters. Furthermore, the study showed that the use of chemical treatment for phosphorous removal could reduce the chlorine dose required for the treated effluent disinfection.
    International Journal of Environment and Waste Management 07/2014; 14(1):1-13.
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    ABSTRACT: This work concerns the synthesis of NaY zeolite derived from low-cost materials like fly ash (FA) for degradation of Acid Orange 7 (AO7) by catalytic wet peroxide oxidation. Synthesized NaY zeolite is characterized using XRD, SEM/EDAX and FTIR. The results indicate that synthesized NaY zeolite is a promising catalyst for dye removal. The effects of various operating parameters like temperature, initial pH, hydrogen peroxide concentration and catalyst loading on the removal of dye, colour and COD from an aqueous solution were studied at atmospheric pressure. The percent removals of dye, colour and COD at optimum pH0 2, 90 oC using 0.6 ml H2O2 solution and 1.5 g/l catalyst was 97% (in 4 h), 99.8% (in 45 min) and 70% (in 4 h), respectively. The % dye removal has been found to be less in comparison to % colour removal at all conditions, e.g. dye removal in 45 min and at above conditions was 82%, whereas the colour removal was 99.8%. Dye, colour and COD removals were maximum at pH0 2.
    International Journal of Environment and Waste Management 02/2014;
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    ABSTRACT: The removal of Ni (II) from aqueous solutions using citric acid activated Hydrilla Verticillata biomass has been studied under batch conditions. The biosorbent characteristics were studied. Batch experiments were performed to study the biosorption of Ni (II) with respect to the effect of operating parameters like initial pH, adsorbent dosage, initial metal concentration, contact time and temperature. The adsorption of Ni (II) increased with increase in contact timer and reached equilibrium at 180 min. The maximum removal efficiency was attained at pH 5.0. The uptake capacity was found to decrease with increase in temperature confirming the exothermic nature of sorption process. The equilibrium data was fitted to three isotherms namely Langmuir, Freundlich and Temkin isotherms. Langmuir model provided the best correlation (R2 > 0.98) for the biosorption of Ni (II) by the selected sorbent and the monolayer biosorption capacity was found to be 11.9 mg g–1.
    International Journal of Environment and Waste Management 01/2014; 14(1):14-26.
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    ABSTRACT: Packed columns were prepared using Posidonia oceanica fibres as adsorbent for the removal of a direct dye, Congo red (CR), from aqueous solution. The effects of flow rate, concentration of CR, pH solution and bed depth on breakthrough curves were investigated. The experimental results showed that the breakthrough time decreased with the increase of flow rate, influent concentration and the decrease of bed depth. The amount of sorbed dye decreased by increasing the flow rate and increased by increasing the dye concentration and bed height. The removal of CR by raw Posidonia fibres reached 80% with a dye concentration of 10 mg.l−1 at the flow rate of 0.47 ml.min−1 and at pH 6.5. Thomas, Yoon-Nelson, Adams-Bohart and bed depth/service time analysis (BDST) models were successfully used to analyse experimental data, to predict the breakthrough curves and to determine the characteristic parameters of the column useful for the process design.
    International Journal of Environment and Waste Management 01/2014; 13(1):1 - 22.
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    ABSTRACT: Vermicomposting is an established process to convert organic wastes into vermicastings suitable for plant growth. This research investigated the vermicomposting of anaerobic digestate with four different ratios of sawdust as a bulking material, for 75 days. The optimum proportion of anaerobic digestate to sawdust was identified as 70:30 based on worm growth and reproduction. Vermicomposting process increased the conversion of ammonium into nitrate when compared with control (p = 0.05). Vermicastings produced at the end of this experiment had significantly high N, NO3-N, P and K than the control (p = 0.05). There was significant reduction in pathogen levels by the worms (99%), and also a germination test undertaken showed an 83% increase in radish seed germination after vermicomposting when compared to raw digestate. The results indicated that vermicomposting with Eisenia fetida is a sustainable technology to convert the anaerobic digestate into nutrient-rich, safe to handle vermicastings, which otherwise is a secondary pollutant.
    International Journal of Environment and Waste Management 01/2014; 14(2):149-164.
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    ABSTRACT: A Hybrid Cells in Series (HCIS) model with decay (HCIS-D) has been conceptualised to simulate advection, dispersion, decay governed pollutant transport. The cells consist of a plug flow zone followed by two unequal size thoroughly mixed zones applied to steady flow and prismatic stream reaches. Compared to the analytical solution of the advection-dispersion-decay equation, the HCIS–D simulations were in good agreement when the size of the hybrid unit, Δx, satisfies the condition, Δx u/D<sub align="right"> L </sub> ≥ 4 or [(α + T<sub align="right"> 1 </sub> + T<sub align="right"> 2 </sub>)u/Δx] ≈ 1, where u is the mean flow velocity, D<sub align="right"> L </sub> is the longitudinal dispersion co-efficient, α, T<sub align="right"> 1 </sub> and T<sub align="right"> 2 </sub> are residence times of plug flow zone, first and second mixed zones of hybrid unit respectively. The potential of the HCIS-D model has been demonstrated using synthetic and field data and the results of the HCIS–D model for non-conservative/decaying pollutant transport were in the expected lines.
    International Journal of Environment and Waste Management 05/2013;