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Most developing countries are disposing of large amounts of biodegradable waste in landfills. Generated landfill gas (LFG) can have negative impact on climate changes but it also can be used as a renewable energy resource. This paper aims to present an application (DeponIS) which supports business processes of waste management on municipal landfills in Serbian conditions. That way better prediction of available LFG quantities can be achieved. This application can help management decisions in several areas: available operational data in real time and strategical decisions based on projections about quantity of LFG in future. It can also be used as a generator for annual reports for Environmental Protection Agency and be in accordance with the polluter pays principle.

The paper analyses the possibility of treating textile wastewater contaminated with the synthetic dye Acid Violet 109 in a microreactor system using advanced oxidation process. Wastewater from textile industry pose a risk to the environment. Effluents this type could be treated on many different ways but many of them have toxic byproducts and have also high operation and maintenance costs. Advanced oxidation processes show success with acceptable operating and maintenance costs. Alternative solution for dealing with wastewater contaminated with dyes is treatment in microreactor systems. Treatment of simulated wastewater with Fenton’s reagent in microreactor system was investigated. Microreactor set consisted of two plunger pump units, mixer and PTFE tube. Efficiency of decolourisation has been determined, with a focus on microreactor parameters, reactants flow and molar ratio of reaction mixture.

Wastewater from textile industry contains considerable amount of dissolved dye that can trigger environmental issues if is not treated properly. Numerous methods have been developed to degrade recalcitrant pollutants safely and utterly. Among them, enzymatic treatment of wastewater is gaining attention due to the enzyme’s specificity, easier manipulation, and generation of less toxic by-products. Still, the cost of enzymatic systems is the main limitation keeping the biocatalysts at lab-scale. Alternative solution for reducing the cost of enzymatic reaction systems is the use of microfluidic systems, which contribute to better mixing, process intensification and cleaner production. In this study, implementation of horseradish peroxidase for removal of the textile dye Acid Violet 109 is performed in a microfluidic reactor. The microreactor consists of three plunger pump units, two mixers and PTFE tube. The process parameters: residence time, dye, hydrogen peroxide, enzyme activity, the reactors’ diameter and length were optimized. Under the optimal process conditions: 30 mg/L dye concentration, 0.8 U/mL horseradish peroxidase activity, 0.1 mM hydrogen peroxide, 0.25 mm reactor’s diameter, 97,3 % removal was achieved at residence time of 6 min. The results from this study show that enzymatic microfluidic reactors are a convenient technology for dye removal.

Climate change projections indicate that Republic of Serbia and the Western Balkans will face a high probability of continuing temperature increases, climatic extremes are projected to become more common, including a significant increase in the number of extreme heat events. Heavier precipitation events are expected in the winter months, whilst summers are projected to become even drier. This paper aims to analyse effect of precipitation changes on landfill gas generation on the Vinča landfill, the biggest landfill in Serbia. Quantities of generated landfill gas and methane have been estimated by using LandGem model. Site specific methane generation rate has been calculated according to GMI methodology for Central Eastern Europe. Sensitivity analyses is performed to determine influence of a precipitation regimes on the methane generation rate on the site. Any increase in precipitation (in range 10-30%) may increase landfill gas production for 4.3%. The paper shows the difference in gas emissions, with the same composition of waste, and different precipitation regimes. Changes in precipitation regimes due to climate change can affect the dynamics of landfill gas emissions. This information is significant for the possible re-circulation of leachate from the landfill which could result in an increased production of landfill gas.

Waste disposal is an important element of integrated waste management. In order to dispose of waste that is free of environmental risk, the proper design of landfills during their construction and/or closure is necessary. The first section of the paper presents the current state of landfills in Serbia, the second deals with problems in project design of landfills, especially in regard to their: a) program of waste disposal; b) impermeable layer; c) leaching collection and treatment; and d) gas collection and treatment. Analysis shows that many modern landfills in Serbia do not meet environmental protection requirements, therefore, they need reconstruction. All existing landfills owned by municipalities, as well as illegal dump sites, should be adequately closed. This paper presents the guidelines for successful landfill design which are to serve to meet the requirements and recommendations of Serbian and European regulations. Sound design of landfill technological elements should insure full sustainability of landfills in Serbia.