Environmental and economic assessment of leachate concentrate treatment technologies using analytic hierarchy process

Zhang, Lingyue; Lavagnolo, Maria Cristina; Bai, Hao; Pivato, Alberto; Raga, Roberto; Yue, Dongbei

doi:10.1016/j.resconrec.2018.11.007

Cited by 69 publications

(42 citation statements)

References 29 publications

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“…In 1990, Saaty proposed the AHP method, an easy-to-use method that calculates the index weight by comparing the predictive factors with each other [48]. It is one of the most commonly used methods for dam site selection.…”

Section: Analytic Hierarchy Process (Ahp)mentioning

confidence: 99%

GIS-Based Modeling for Selection of Dam Sites in the Kurdistan Region, Iraq

Othman¹,

Al-Maamar²,

Ali

et al. 2020

IJGI

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Iraq, a country in the Middle East, has suffered severe drought events in the past two decades due to a significant decrease in annual precipitation. Water storage by building dams can mitigate drought impacts and assure water supply. This study was designed to identify suitable sites to build new dams within the Al-Khabur River Basin (KhRB). Both the fuzzy analytic hierarchy process (AHP) and the weighted sum method (WSM) were used and compared to select suitable dam sites. A total of 14 layers were used as input dataset (i.e., lithology, tectonic zones, distance to active faults, distance to lineaments, soil type, land cover, hypsometry, slope gradient, average precipitation, stream width, Curve Number Grid, distance to major roads, distance to towns and cities, and distance to villages). Landsat-8/Operational Land Imager (OLI) and QuickBird optical images were used in the study. Three types of accuracies were tested: overall, suitable pixels by number, and suitable pixels by weight. Based on these criteria, we determined that 11 sites are suitable for locating dams for runoff harvesting. Results were compared to the location of 21 preselected dams proposed by the Ministry of Agricultural and Water Resources (MAWR). Three of these dam sites coincide with those proposed by the MAWR. The overall accuracies of the 11 dams ranged between 76.2% and 91.8%. The two most suitable dam sites are located in the center of the study area, with favorable geology, adequate storage capacity, and in close proximity to the population centers. Of the two selection methods, the AHP method performed better as its overall accuracy is greater than that of the WSM. We argue that when stream discharge data are not available, use of high spatial resolution QuickBird imageries to determine stream width for discharge estimation is acceptable and can be used for preliminary dam site selection. The study offers a valuable and relatively inexpensive tool to decision-makers for eliminating sites having severe limitations (less suitable sites) and focusing on those with the least restriction (more suitable sites) for dam construction.

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Section: Analytic Hierarchy Process (Ahp)mentioning

confidence: 99%

GIS-Based Modeling for Selection of Dam Sites in the Kurdistan Region, Iraq

Othman¹,

Al-Maamar²,

Ali

et al. 2020

IJGI

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“…It integrates multiple independent factors into a composite factor to simplify the complexity of rankings and has been accepted by decision makers [23]. The AHP has also been successfully applied in hospital site selection [24], the evaluation of energy production technologies [25], teaching quality assessment [26], environmental and economic assessment [27].…”

Section: Of 14mentioning

confidence: 99%

Optimization and Evaluation of Ventilation Mode in Marine Data Center Based on AHP-Entropy Weight

Feng

Lei

Guo

et al. 2019

Entropy

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The ventilation mode affects the cooling efficiency of the air conditioners significantly in marine data centers. Three different ventilation modes, namely, underfloor ventilation, overhead ventilation, side ventilation, are numerically investigated for a typical marine data center. Four independent parameters, including temperature, velocity, air age, and uniformity index, are applied to evaluate the performances of the three ventilation modes. Further, the analytic hierarchy process (AHP) entropy weight model is established and further analysis is conducted to find the optimal ventilation mode of the marine data center. The results indicate that the underfloor ventilation mode has the best performance in the airflow patterns and temperature distribution evaluation projects, with the highest scores of 91.84 and 90.60. If low energy consumption is required, it is recommended to select the overhead ventilation mode with a maximum score of 93.50. The current evaluation results agree fairly well with the three dimensional simulation results, which further proves that the AHP entropy weight method is reasonable and has a high adaptability for the evaluation of air conditioning ventilation modes.

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“…There are various leachate treatment technologies, including coagulation-flocculation, adsorption by activated carbon, biological treatment and membrane separation processes, such as nanofiltration and reverse osmosis (RO). 9 Treatment efficiency depends on the operating conditions and the composition of the leachate in its initial state. Elimination of pollutants implies reduction of the pollutant load in order to reach the discharge standards imposed by Moroccan regulations.…”

Section: Introductionmentioning

confidence: 99%

Removal of Pollution by Intensive Aeration Technology for Landfill Leachate Treatment

Zineb

Mouhir

Souabi

et al. 2020

Journal of Health and Pollution

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Background. Landfill leachate is a source of environmental pollution and a major concern for human health because it contains high concentrations of organic and inorganic contaminants. Objectives. The objective of the present study is to validate the efficiency of the forced aeration treatment technique, which consists of intensively injecting a continuous oxygen flow of 16.75 kg/m3/h for 30 days using a bubble air diffuser in a relatively small volume of 1 m3. The principle of the technique is essentially based on acceleration of the degradation of the effluent as well as reduction of the organic and nitrogenous matter contents. Methods. Forced aeration technology was used for the treatment of leachate from the Mohammedia-Benslimane landfill. The sample was treated by injecting a flow of oxygen to accelerate the biodegradability of the pollutants by the microorganisms. Results. The physicochemical characterization of the raw leachate at the inlet of the aeration tank showed high values for chemical oxygen demand (COD) (38,600 mg O2/l), biological oxygen demand (BOD5) (24,000 mg O2/l), and total Kjeldahl nitrogen (TKN) (5,932.45 mg/L). The proposed treatment technique allowed relatively high purification yields to be achieved, with abatement rates for the major elements COD, BOD5 and TKN of 73%, 98%, and 85%, respectively. Conclusions. The treatment of leachate by intensive aeration technology reduces considerably the pollutant load and achieves a high purification yield. Competing Interests. The authors declare no competing financial interests.

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Environmental and economic assessment of leachate concentrate treatment technologies using analytic hierarchy process

Cited by 69 publications

References 29 publications

GIS-Based Modeling for Selection of Dam Sites in the Kurdistan Region, Iraq

GIS-Based Modeling for Selection of Dam Sites in the Kurdistan Region, Iraq

Optimization and Evaluation of Ventilation Mode in Marine Data Center Based on AHP-Entropy Weight

Removal of Pollution by Intensive Aeration Technology for Landfill Leachate Treatment

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