Current EU legislation on waste management (2008/98/EC) and conservation of water systems (91/676/EEC) has seen a growth in the area of compost research. Traditionally the commercial crop growing and agricultural industries have used inorganic fertilisers as the main source to supply nutrients to crops and plants.
A. Lee - Dublin Institute of Technology, Kevin St. Dublin 8
This study aims to investigate nitrogen (N) and phosphorus (P) release from composted waste materials from numerous different feedstock materials. Much of the literature available on compost research is limited to studies investigating N availability and to a lesser extent P as a nutrient source. This study will also help to gain knowledge of release rates for both N and P. There is a great importance in understanding N and P availability from composted waste. The reasons for this being that it is essential to apply a sufficient amount of compost to ensure the necessary uptake of N and P by the plant whilst minimising the possibility of nutrient run – off which may have adverse effects on the environment. An incubation study was conducted to investigate available N and P from the various composts over a four week period. The N incubation was conducted at 25°C whilst the P incubation was conducted at 30°C. Rates of application were bases on compost total N and total P as an N and P equivalent to chemical control (calcium ammonium nitrate (CAN) and single superphosphate (SSP)). Initial results show that available N displayed a more consistent trend than P. The manure wastes were the only category to show an increase in available N over the incubation period. The catering/food waste group was the only other group to exhibit an available N level above 10% during the incubation. The other three groups were all less than 10% initially before dropping to less than 1% by the final extraction. The P results were more varied. Manure wastes had a high initial available P ~40% but had a rapidly decreasing supply, similar to the control. Both biowaste and green waste had an increase in available P at the second extraction before decreasing at the last extraction. The municipal and catering/food wastes had the steadiest available P levels over the four week incubation.
|Copyright:||© European Compost Network ECN e.V.|
|Quelle:||Orbit 2012 (Juni 2012)|
|Preis inkl. MwSt.:||€ 7,00|
|Autor:||Dr Munoo Prasad |
Prof John Cassidy
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Development of local municipal solid waste management in the Western Transdanubia region of Hungary
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2020)
Hungarian municipal solid wastes (MSW) management has developed tremendously over the past 15 years. More than 3,000 landfills and dumps had been closed, just to mention one improvement. However, still, lots of work is necessary to accomplish the EU’s ambitious aim of decreasing landfilling and increasing recycling and composting.
Qualität von Siebüberläufen aus Kompostierungsanlagen und Verwertungsoptionen
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2018)
Vor dem Hintergrund zunehmender Siebrestmengen und steigender Entsorgungskosten in Biogutbehandlungsanlagen wurden Sortieranalysen von Siebresten aus verschiedenen Anlagen sowie eine Befragung von Anlagenbetreibern durchgeführt.
Compost-like material or thermal valorization – impact on MBT Plant economics and environmental aspects – Case studies in Portugal and UK
© Wasteconsult International (5/2015)
The paper focuses on the utilisation of the solid product from the biological Treatment stages of three MBT Plants which treat the organic fraction of MSW by means of wet mechanical pre-treatment units followed by anaerobic digestion. The experiences of two MBT Plants in Portugal (CVO Valorlis and CVO Suldouro) which produce compost-like material are contrasted with the experiences at the MBT Bredbury Parkway (UK) which, by drying the digested solids, produces a RDF with low calorific value for further use in thermal valorisation. The impact of these two different approaches on the operating costs for the treatment of the digested solids as well as the environmental aspects for both valorization paths is discussed.
Post-treatment of Composting Leachate by Photocatalytic Process
© Wasteconsult International (5/2015)
In this study the capability of UV-ZnO photocatalytic process as a post Treatment method for composting leachate was examined at laboratory scale and in batch mode. The effect of some factors such as initial pH, oxidant concentration, light intensity and reaction time on the removal of organic load and color of leachate were investigated. Biological pre-treated leachate samples were collected from the effluent of leachate treatment facility of a composting plant in north of Iran. A Plexiglas column with 110 mm inner diameter and 300 mm height were used to conduct experiments. UVC lamps with different power levels in the range of 8-40W at the centre of the column were used as the source of irradiation. Based on the results of experiments, after 180 minutes of Radiation with 32W UVC lamps in pH 11 and in the presence of 1g.L-1 of slurry ZnO, maximum COD and color removal were achieved to be 57% and 67%, respectively.
Decentralized Composting in Low Income Countries - Urban Land Price and Compost Value as Key Factor
© European Compost Network ECN e.V. (6/2014)
Urban population is steadily increasing across the world; most recent estimates show that by 2050, 70% of the world’s population will be urban. As in low and middle income countries the organic fraction plays a major role in MSW, the feasibility of its collection and treatment in megacities across the world will become more and more an issue to be investigated.