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[en] One of the environmental effects of waste dumps is the emission of landfill gas. Several options to use that gas are available: (1) burn off, (2) use in a combined heat and power generating installation, (3) upgrading to natural gas quality, followed by supply to the natural gas distribution, and (4) use of the raw landfill gas in an industrial process. For one particular site in the Netherlands economic, energetic, environmental and quality aspects of those uses are calculated 1 fig
[en] This viewpoint article offers the proposition that purpose-grown biomass buried in landfills constitutes a 'virtual' biofuel that is more practical, economic, and immediate than the use of actual biofuels from cellulosics. While not a permanent solution, it may be a useful bridge to the hoped-for era of actual biofuels prior to the time technology for economically converting cellulosics to actual liquid biofuels is realized
[en] The identification of garbage at several points along the Badung river shows a low level of public awareness of the environment. The origin of the contents of the garbage in the Badung river comes from various human activities such as industry, household and nature. Although there is a trash rack, but it is not optimal in reducing plastic waste carried on the river. There are several reasons that cause people to throw garbage into the river. Among other things, disposing of garbage into the river is considered more practical and freer, the lack of garbage disposal facilities around the river and has become a culture. Therefore, research was conducted on community behaviour in disposing of garbage along the Badung river. The results showed trigger factors variable with a very influential factor, namely the existence of a disease of 79%. And as many as 5% of the people feel that the availability of Temporary Disposal Site facilities has no effect. The waste management system will be managed directly by the Waste Self-Management Group in each village, as an effort to build an integrated system. It also educates the public how to sort, manage and utilize waste. With the proper governance, of course, it can reduce the volume of waste to landfill. (paper)
[en] Landfill leachate normally contains organic and inorganic pollutants in high concentrations. Electrochemical oxidation technique is an effective method to treat landfill leachate, have high efficiency in organic pollutants degradation and ammonia removal. In this study, a cost effective charcoal base metallic composite electrode to treat landfill leachate by electrochemical oxidation was fabricated. The effects of operational parameters such as supporting electrolyte, applied voltage and electrolysis time on the removal percentage of Color, COD, NH_3-N and total-P (PO_4"-"3) were carried out. The results obtained show that the removal percentage of Color, COD, NH_3-N and total- P (PO_4"-"3) are 70, 89, 73 and 80 % respectively. Under the optimum operating condition, sodium chloride concentration of 1.5 % (w/v), applied voltage of 10 V, operating time 180 min and C_6_0C"G_1_5Co_1_0"-PVC_1_5 electrode as an anode were used. (author)
[en] Non-compliant landfills contain significant amounts of waste accumulated for years, representing significant sources of soil, air and groundwater pollution and population illness. All non-compliant urban landfills have closed storage before the year 2009. The non-compliant urban deposits in Timis County were unfinished and did not meet the conditions for the protection of environmental factors according to the Government Decision no. 349/2005 on waste disposal, Decision transposing Directive no. 1999/31 / EC on the storage of waste, therefore the required closure procedures that were finalized in the year 2015. The paper aims to present closing procedures that were taken to close the Parț a non-compliant landfill as part of the Integrated Waste Management System in Timis County, co-financed by the European Regional Development Fund (ERDF), through the Sectoral Operational Program Environment 2007 - 2013, Priority Axis 2, “Development of integrated waste management systems and the rehabilitation of contaminated historical sites” (paper)
[en] Landfill, a matured and economically appealing technology, is the ultimate approach for the management of municipal solid wastes. However, the inevitable generation of leachate from landfill requires further treatment. Among the various leachate treatment technologies available, advanced oxidation processes (AOPs) are among powerful methods to deal with the refractory organic constituents, and the Fenton reagent has evolved as one promising AOPs for the treatment of leachates. Particularly, the combination of UV-radiation with Fenton's reagent has been reported to be a method that allows both the photo-regeneration of Fe2+ and photo-decarboxylation of ferric carboxylates. In this study, Fenton and photo-Fenton processes were fine tuned for the treatment of leachates from the Colmenar Viejo (Madrid, Spain) Landfill. Results showed that it is possible to define a set of conditions under which the same COD and TOC removals (approx 70%) could be achieved with both the conventional and photo-Fenton processes. But Fenton process generated an important quantity of iron sludge, which will require further disposal, when performed under optimal COD removal conditions. Furthermore conventional Fenton process was able to achieve slightly over an 80% COD removal from a 'young' leachate, while for 'old' and 'mixed' leachates was close to a 70%. The main advantage showed by the photo-assisted Fenton treatment of landfill leachate was that it consumed 32 times less iron and produced 25 times less sludge volume yielding the same COD removal results than a conventional Fenton treatment.
[en] The Radium Action Plan 2015-2022 aims at mitigating the risks arising from radium legacies from the watch industry in Switzerland. This paper describes the measures put in place regarding the handling of contaminated properties and former landfills where wastes containing radium were deposited.
[en] Highlights: • Pairing social and technical innovations improves organic collection programs. • Supportive infrastructure significantly increases household food waste diversion. • Norm communication increases separation behavior and reduces dropout. •Model predicting-fit best behavior-change tools is partially supported. • Norms are most effective on population perceiving low benefits and barriers. - Abstract: Cities around the world are under increasing political pressure to develop organics collection programs (OCP) to curb the flow of food waste into landfills, reduce the associated greenhouse gases, and generate compost or biogas. While OCPs tend to focus on infrastructure, they often overlook the linchpin role that household behavior change plays in the success of OCPs. The current research used a longitudinal field experiment (n=370) to test both the effectiveness of a new curbside OCP and new social innovations intended to stimulate pro-environmental changes in household behavior. The findings suggest greater participation levels occur by implementing both new supportive infrastructure (i.e., curbside carts and collection services), and innovations that target the social aspects of waste (i.e., communicating social norms of separation). The data also provide an opportunity to test new model for predicting the most efficacious behavior-change interventions based on population profiles. The results provide some support for the model; reducing barriers (i.e., curbside carts and collection) tends to help all population profiles, but norm communication increases participation more for the hypothesized profile than for other sub-groups.
[en] This paper aims at providing an overview of electrochemical oxidation processes used for treatment of landfill leachate. The typical characteristics of landfill leachate are briefly reviewed, and the reactor designs used for electro-oxidation of leachate are summarized. Electrochemical oxidation can significantly reduce concentrations of organic contaminants, ammonia, and color in leachate. Pretreatment methods, anode materials, pH, current density, chloride concentration, and other additional electrolytes can considerably influence performance. Although high energy consumption and potential chlorinated organics formation may limit its application, electrochemical oxidation is a promising and powerful technology for treatment of landfill leachate