Release of VOCs and leachate during bio-drying process of MSW with high water content
© Wasteconsult international (5/2011)
Two treatments were conducted to investigate the release patterns of volatile organic compounds (VOCs) and leachate during the bio-drying of municipal solid waste (MSW) by intermittent and continuous passive ventilation. The results showed that butyraldehyde was the major contributor to the VOCs emission, and it’s maximum concentration was 254 ppm (v/v).

Biological mechanical treatment of municipal solid waste in China: lab and field application
© Wasteconsult international (5/2011)
High water content and the putrescible property of municipal solid waste (MSW) could greatly deteriorate the sorting efficiency, deactivate the operations of aerobic treatment and incineration, as well as aggravate the landfill pollutions.

Characteristics of Treated Waste from European and Southeast Asian Cities
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2010)
An understanding of mechanically and biologically treated waste characteristics can lead to an optimization of the Mechanical and Biological Treatment (MBT) technology. For a sustainable waste management, it is essential to determine the characteristics of the final MBT waste, the effectiveness of the treatment system as well as the potential application of the final material regarding future utilization.

Enhanced biogas production of primary sludge co-digested with crude glycerol
© Aristotle University of Thessaloniki (6/2009)
The effects of crude glycerol on the performance of single-stage anaerobic reactors treating sewage sludge were examined. A significant decrease of biogas production in the digester fed with sewage sludge supplemented with 3% crude glycerol was observed after 20 days of operation.

The adsorption of Cd(II) ions by poplar wood sawdust
© Aristotle University of Thessaloniki (6/2009)
The biosorption of cadmium (II) by raw and poplar wood sawdust modified with 1% NaOH at room temperature was studied in a batch system. The modified poplar wood sawdust had higher adsorption capacity for about five times, and adsorption affinity for about twenty times related to unmodified one.

The comparison of PAHs changes content in sewage sludge and supernatants under redox conditions
© Aristotle University of Thessaloniki (6/2009)
In this study, the changes of PAHs in sewage sludge and supernatants during anaerobic digestion under nitrate- and sulphate–reducing conditions were investigated.

Zinc release kinetics in a calcareous soil treated with waste tire ash and powder as alternatives to Zn fertilizers
© Aristotle University of Thessaloniki (6/2009)
The aim of this work was to study release kinetics of zinc from a soil treated with waste tire ash and powder and to compare it to a commercial Zn fertilizer and to a laboratory grade zinc sulfate. A Zndeficient soil was chosen from a wheat field in Isfahan province, central Iran. The soil Zn concentration was elevated to the equal and four times of the soil Zn critical deficiency concentration.

Evaluation of lead concentration in soil and plant treated with compost
© Aristotle University of Thessaloniki (6/2009)
As a resource, biosolids amendments present an attractive alternative for the improvement of agricultural land productivity due to its fertilizer value. Biosolids application on agricultural land as fertilizer is commonly in many countries. Compost is one of the biosolids that rich in macro and micro nutrients. However, high concentrations of heavy metals such as copper (Cu), zinc (Zn), cadmium (Cd), lead (Pb) and nickel (Ni) in compost may cause soil and groundwater pollution and transport heavy metals to food chain by crops.

A greenhouse experiment investigating the effects of sewage sludge on nickel availability in soil and maize
© Aristotle University of Thessaloniki (6/2009)
Fertilizers are commonly used as a tool to reach maximum yield. Generally application of biosolids on agriculture land as fertilizers is more practical in many countries because of their low price. Sewage sludge includes high levels of macro and micro nutrients that may also cause the high concentration of heavy metals in soil but can be effective on maize yield (unclear meaning). Sewage sludge may have high concentration of heavy metals that can be transfer to the human food chain. Therefore, it is important to reduce the soil pollution from these compounds.

Technical parameters and operational cost of a pilot MSW balingwrapping in Alexandroupolis, Greece
© Aristotle University of Thessaloniki (6/2009)
The technology of baling-wrapping offers a solution of interim storage of Municipal Solid Waste (MSW) management. In Greece there are no documented cases of cylindrical baling-wrapping of MSW even though such technology is being used widely in other countries.

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