Portability of waste management concepts and technologies

The Federal Ministry of the Environment, Nature Conservation and Nuclear Safety finances the International Climate Initiative (IKI) by means of carbon trade revenues. IKI supports worldwide projects for climate mitigation, adaptation to climate change, and for the conservation to climate-relevant biodiversity. Since 2006 AWN Umwelt GmbH (Buchen) initiates in Gaobeidian (South of Bejing) the establishment of a mechanical biological treatment plant (MBT) aiming on the reduction of methane emissions from decay of organic waste components at landfills. The greenhouse effect of methane, which is generated at landfills, is 20times higher than the effect of CO2. Due to biological treatment, organic components are being stabilized, what reduces decay after final disposal significantly. In summer 2009 the implementation of the project started. The facility opened for operation in September 2011. In early 2012 full operation will be accomplished. The MBT-plant consists of a biological treatment with active aeration processing 40.000 t of residual waste per year. In the mechanical step 4000 t of recyclables will be segregated. The MBT-output will be utilized as a methane oxidation layer covering old landfill sites. The facility also features a model plant for anaerobic digestion. TU Braunschweig provides scientific assistance during the start up operation. The project developer AWN Umwelt operates the facility during the first year of operation prior to transferring to the local government of Gaobeidian. The virtually certifiable emission reduction is expected to 500.000 tCO2eq for a monitoring period of 20 years.

Worldwide about 60 million tonnes of CH4 are emitted annually by landfills, which roughly corresponds to a share of 28 % of the anthropogenic methane emission (BAHR ET. AL., 2006). Whereas in Germany landfill gas potential is mostly reduced due to biomechanical or thermal waste pre-treatment, untreated urban waste disposal is still the common case globally. Chinese landfills alone produce with its 9.5 million t of CH4 nearly 200 million t CO2-equivalents per year. It is obvious that only minor reduction potentials in the field of methane emission by urban waste management are to be expected in Germany. They predominantly exist in the area of optimizing the existing facilities/ plant, where a high effort is accompanied by a rather small result. It appears more beneficial however to export German treatment technologies and waste management strategies to countries, where selective measures for emission reduction (pre-treatment, landfill gas collection, sealing of the landfill surface) have not yet been established. Technical adaption to climatically, geological and infrastructural conditions have to be considered as well as cultural aspects, such as educational attainment of the workforce, political and social acceptance, social tolerance and possibly already existing formal or informal strategies and structures for recycling and waste prevention.

Copyright: © Arbeitsgemeinschaft Stoffspezifische Abfallbehandlung ASA e.V.
Source: 9. Recyclingtage 2012 (September 2012)
Pages: 8
Price: € 4,00
Autor: Dr.-Ing. Florian Kölsch
Dipl.-Ing. Christof Heußner
Prof. Dr.-Ing. Klaus Fricke
Dr. Mathias Ginter

Send Article Add to shopping cart Comment article

These articles might be interesting:

Effects of environmental factors on methane generation: Test Cell Study
© IWWG International Waste Working Group (10/2007)
This paper presents that how environmental factors such as temperature, pH, and ammonia nitrogen affected on methane production within a test cell. Test cell covered an area of 54 m2 and had a final waste height of average 3 meters by filling approximately 147 tons of municipal solid waste (MSW). Results showed that pH level did not affected on methane production from MSW deposited after changed waste policy, which limits food waste landfilling; however, ammonia nitrogen level and waste temperature affected on methane prodution. Especially, the inhibition of methane production within landfills was severe when waste temperature is below 15Ž and during initial anaerobic decomposition process.

© IWWG International Waste Working Group (10/2007)
The total production of municipal solid waste (MSW) is continuously increasing. Among the different MSW treatment procedures, anaerobic digestion presents major advantage over alternative methods as a rapid and complete stabilization of the organic waste. It directs the organic flux towards renewable energy source (biogas) and an almost-stabilized residual organic matter fraction. The biogas is collected to minimize the greenhouse effect and can be valorized to heat or to electricity.

© IWWG International Waste Working Group (10/2007)
Biogenous wastes are, irrespective of their origin,(municipal garden, kitchen and food waste; waste from food production or from agriculture and forestry) of particular interest in the field of waste management, due to the considerable quantities involved, composition and quality. On the one hand recyclable biogenous residues are a resource with high nutrient contents, whilst on the other the degradation and conversion of organic matter is detrimental in increasing the greenhouse effect due to the production of greenhouse gases such as methane or nitrous oxide. In waste management separate collection and composting of biogenous waste is considered a useful option. In addition, anaerobic digestion or incineration of biowaste are common treatment possibilities.

© IWWG International Waste Working Group (10/2007)
Increasing fossil fuel prices and greenhouse gas (GHG) reduction requirements compels energy users to utilise cost effective materials that also have a significant biomass fraction. The biomass fraction is considered ‘carbon neutral’ and does not contribute towards GHG emissions. The UK, like many Member States, is facing challenging landfill diversion targets for BMW (biodegradable municipal waste) to fulfil the Landfill Directive (Council Directive, 1999) requirements (Garg et al., 2007). According to the latest data, the UK landfilled ca. 62% of total MSW in 2005-06 (Defra, 2006).

MSW management in Estonia: The current situation and future potential for energy recovery from sustainable sources
© Wasteconsult international (5/2017)
In order to comply with EU legislation, Estonia is in the process of establishing integrated waste management. Already today, there is an over capacity of MSW Treatment infrastructure effecting especially the operation of Estonian MBT plants.



 Keep me signed in

Forgot your password?