Because of the legislation demands and increasingly diflicult and expensive way to provide the landfill space, MBT (mechanical-biological treatment) of the residual mixed municipal waste is foreseen for the Ljubljana region. The analysis of possible treatments for residual mixed municipal waste and analysis of chosen treatments are presented. The chosen treatments are analysed from the principles of sustainable development. On the basis of comparative analysis, a proposition of preferential procedure is suggested. The chosen treatments are analyseli and compared from the environmental point of view and also from economic and sociological point of view. The treatment process recently suggested by Snaga is also taken into considoration. The analyses, which are presented in this paper, were made completely separately from those made by Snaga. The proposition of preferential treatment consists of sorting-out the recyclables, mechanical separatian of the lighter, caloric fraction to be usod as a solid recovered fuel, whereas the residual heavy fraction (which contains the concentrated biodegradable components) is prepored and utilised in on anaerobic digestion with the production of biogas and the dehydration of the sludge before disposal.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 4613914The paper consideres the recovery of fuel from deposits from fule reservoirs. Copmmercial fuels like diesel and gasoline are nonrenewable energy sources! They will remain the irreplaceable primary engine fuel and energetic source for next few decades. Sustainable development is in the foreground, an environment-friendly recovery process is sought by taking advantage of the cogeneration of energy, by using simple technology and solutions which make the environment regeneration of fuel possible without using harmful chemicals to the environment directly and indirectly. Process and apparatus how to separate these fuels from the oily sludge is presented.
F.14 Improvements to existing production methods and tools or processes
COBISS.SI-ID: 4685082When considering the organic waste treatment we have generally in mind organic mineralization, biological stabilisation and detoxification of pollutants. Most common organic wastes contain compounds that are mainly well biodegradable. They can be readily mineralized either through biological treatment (aerobic or anaerobic), or thermo chemical treatment such as incineration, pyrolysis and gasification. The latter will not be treated in this work. Most organic wastes produced today originate in municipal, industrial and agricultural sector. Municipal waste (as well as municipal wastewater sludge) is generated in human biological and social activities and contains a large portion of organic waste readily available for treatment. Agricultural waste is common in livestock and food production and can be utilised for biogas production and therefore contribute to more sustainable practice in agriculture. Industrial wastes arise in many varieties and are the most difficult for biological treatment, depending of its origin.
B.04 Guest lecture
COBISS.SI-ID: 4544282Quantities an properties of bidegradable waste generated yearly on the teritory of Slovenia are presented and critically discussed. They represent about 25% of all waste and appear in about 60 main types from various sources: municipalities, agriculture, forestry and industry. Annual quantities have started to drecrease slowly due to separate collection of food waste an alike. However many tipes and quantities are still not included into the inventory and treatment.
B.04 Guest lecture
COBISS.SI-ID: 4544026WWTPL is the largest waste water treatment plant in Slovenia and it is designed as a one-step mechanically biological treatment plant with a secondary level of cleaning which means removal of carbon compounds and nitrification. Excess sludge is formed at the aerobic treatment process and is extracted from the system daily. final processing. It is infectious and subject to make a stench. Further processing converts the excess sludge to a controllable form. Procedures assigned to this are mechanical (gravitational) primary thickening in settling tanks, followed by a machine thickening with an addition of polymer. After this part the content of dry substance increases up to around 5.5 %, to 6.5 %. This is followed by an anaerobic stabilization of sludge in the anaerobic digester where the content of dry substance is reduced to around 3.5 % to 4.5 % (on behalf of biogas production) and therefore the sludge gains the feature of longer existence and broader options of further usage.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 4110618