Ehsan Ahmadi; Ayyob Rastegar; Mehdi Farzadkia; Ali Azari
Volume 20, Issue 4 , January and February 2014, , Pages 530-538
Abstract
Background &Objective: According to the existing documents a major portion of municipal solid wastes in Iran is being land filled and small portion of this material is recycled, while the municipal waste management in developing countries has moved towards source separation and recycling .This research ...
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Background &Objective: According to the existing documents a major portion of municipal solid wastes in Iran is being land filled and small portion of this material is recycled, while the municipal waste management in developing countries has moved towards source separation and recycling .This research was conducted by the purpose of estimating Qom municipal solid waste recycling potential and cost benefit,s in a 20-year vision since 2006.
Materials & Methods: This Research is a cross-sectional study. Firstly, according to the reports given by waste management organization in Qom city, dry solid waste recycling in 2006 and 2011 was estimated. Then two scenarios consisted of 20 and 60 percents of recycling were estimated to process the solid waste in 2011 and 2028 for enhancing recycling level ,and then cost benefit of them was determined.
Results: The average of produced solid waste was 718 ton per day in Qom city in 2011. Due to this producing process in 1407 we will have 1145 ton solid waste per day in this city. Daily economic benefit of dry solid waste recycling in 2011 was 15801520 Rials. If the recycling programs promotes, this benefit can be increased to 63211640 and 189664400 Rials for 20 to 60%recycling level.
Conclusion: Despite of 21 % potential for dry solid waste recycling in Qom city, nowadays about 5% of this substances are recycling. By upgrading the plan for 10 to 20 years, amount of economic benefit can be increased to 4 to 12 times.
Roshanak Rezaei Kalantary; Ahmad Allah-Abadi; Mehdi Farzadkia; Ayyob Rastgar; Ahmad Joneidi Jafari; Abdolmajid Gholizadeh
Volume 19, Issue 3 , September and October 2012, , Pages 277-286
Abstract
Background: Leaching of nutrients and heavy metals from municipal solid waste compost leads to accumulation of certain elements in soil layers, causing underground water pollution. The objective of this study was to investigate the effect of compost on leaching and adsorption of heavy metals and nutrients ...
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Background: Leaching of nutrients and heavy metals from municipal solid waste compost leads to accumulation of certain elements in soil layers, causing underground water pollution. The objective of this study was to investigate the effect of compost on leaching and adsorption of heavy metals and nutrients (sodium, potassium, and sulfate) from silt-loamy soils. Materials and Methods: In this empirical, applied study, three polyethylene columns (height 50 cm, inner diameter 10 cm), filled with sandy clay loam soil, were randomly selected. Then, 10 kg of compost per square meter were sprayed onto the columns, and leachates exiting the columns were routinely analyzed for pH, electrical conductivity, sulfate, sodium, potassium, lead, chromium, and cadmium. Data analysis was performed with Excel and SPSS software using Kruskall-Wallis test. Results: The data showed that the use of enriched and unenriched compost leachate decreased pH (from 7.43±17.0 to 6.7±0.25 and 7.07±0.11, respectively) and increased the electrical conductivity (EC) (from 1.8±0.3 mSiemens/m to 3.7±0.12 and 12.87±0.41 mSiemens/m respectively). Leakage of metals in the unenriched treatments was not significantly different from the control (p>0.78), but leakage with three metal-enriched compost applications was significant compared with control (p