GPE 26 The biogas and anaerobic digestion plant of Minett Kompost ...

The biogas andanaerobe digestion plantof the Minett Kompostin Mondercange

Le Syndicat Minett-KompostGeneral information•22 member municipalities•approx. 190.000 inhabitants•32.500 t/yr bio waste and greenwaste•1 composting plant in Mondercange(Canton Esch-sur-Alzette) with apermitted capacity of 20.000 t/yr.

Basic situationComposting facilityCommercial operation: 1997Authorized capacity: 20.000 t/yr biowaste and green wasteProcess:table windrow composting (Wendelin / Bühler)Retention time:10 weeksProduct:5-6.000 t/yr compost (Rottegrad IV)

Current commercialisation products• Commercialisation of compost toprivate clients and professionals• Development andcommercialisation of compost„FloraVitalis“ by IGLux.The marketing is done mainly insupermarkets «Cactus» in theGrand Duchy of Luxembourg.(approx. 10.000 bags/yr)

Basic situationEvolution of the quantity of waste collected from 1998 to 2009Mengenentwicklung 1998-200935.00030.000Gesamtinput [Mg/a]25.00020.00015.00010.0005.00001998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009JahrBioabfallGrünabfall

Increase of the treatment capacity in MondercangeSyndicate’s decision on the basis ofvarious feasibility studies and incollaboration with the Ministry of theenvironment respectively with theEnvironmental Administration and thelocal natural gas supplier SUDGAZ SA.+•Priority treatment of biowaste and thefermentable part of green waste in amethanation plant.•Treatment of green non-fermentablewaste and excessive organic waste inthe existing composting facility .=+•Purification of produced biogas andinjection of the biomethane gas into thelocal grid of SUDGAZ SA.•Addition of energy plants during thewinter months for homogenization ofgas production.

Increased processing capacityMengenverteilung Bioabfälle und vergärbarer der Monochargen nach Siebung1000900Gesamtkapazität Vergärungsanlage undKompostanlage800700Kapazität VergärungsanlageMasse in Mg/wo60050040030020010001 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49KalenderwochenBioabfälle und vergärbarer Anteil der MonochargenErwarteter Siebdurchgang < 60mm

Quantity entries of the anaerobic digestion plantMögliche Energiepflanzenzugabe Vergärungsanlage900800700GesamtkapazitätVergärungsanlage600Gesamtkapazität biologischeBehandlungMasse in Mg/wo50040030020010001 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49KalenderwochenMögliche EnergiepflanzenzugabeBioabfälle und vergärbarer Anteil der Monochargen nach Siebung

Quantity entries of the composting facilityVerarbeitungsmengen Kompostwerk500450400350Masse in Mg/wo3002502001501005001 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49KalenderwochenBioabfälle und vergärbarer Anteil der Monochargennicht vergärbarer Anteil der Monochargen (Baum-und Strauchschnitt)

The anaerobic digestion plant

The fermentation process

The gas purification unit

Purification and injection of biogas? Why?•CO2 reduction•No opportunity for effective use of heat inMondercange•State support for renewable energyproduction•Classification of the project as „pilot projectof Luxembourg for biogas injection in naturalgas grids“•Attractive remuneration for the injected biomethaneWhy washing with amines?•Reduced methane loss•Reduced investment and operating costscompared to PSW

Quality of produced biomethaneMeans of absorption:DiethanolamineComposition of produced biomethane:Copntent of menthane: > 97%CO 2: < 2.5%O2: < 1%H 2S:< 5 mg/Nm³Injection pressure: 2.5 -3.0 barHumidity:dew point -80°CTemperature: 10 – 15°CMethane loss: < 0.25%Supplement of propane: approx. 7%Injection amount: approx. 1,5 Mio. Nm 3

2011: Input and output of the anaerobe digestion plant• Treatment of 25.000 t/y biowaste• Optimal addition of 4.000 t/y energy crops• Production of 1.600.000 Nm3/ybiomethanand injection in the local gas grid• 7000 t/y compost• Economy of approx. 2.500 t/y CO2

Electricity- Grant Mechanisms in Luxembourg02/08/2008 RGD (Regulations for electricity production based on renewableenergy sources)• Contract Period: 15 years (except in case of extension: 20 years)• Power < 150 kW: 15,00 c€/kWh• 150 kW < Power < 300 kW: 14,00 c€/kWh• 300 kW < Power < 500 kW : 13,00 c€/kWh• 500 kW < Power < 2,5 MW: 12,00 c€/kWh• Heat Prime: 3,00 c€/kWh thermic- if recovery of min. 25% of waste heat (installation 3 years)−Obligation to purchase a flat rate;−Only renewable electricity produced in territory of the Grand Duchy−The costs generated by the subsidization of renewable electricity are borneby the Network Manager (impact provisions of the final consumers notspecified)−Fixed rates of contract−Volume discounts depending on the year of commissioning

Injection of biogaz – Grant Mechanisms in LuxembourgGrand-Ducal Regulation concerning the production, remuneration andcommercialization of biogas (23 march 2010)•First injection before 01.01.2011: 0,065 €/kWh•First injection before 01.01.2013: 0,0625 €/kWh•First injection before 01.01.2014: 0,060 €/kWh−Methane losses < 0,5% (amines) or

What has been learned through the project ?• Each project is unique!Technical solutions may be partly transferable to other projects, butoptimized and locally adapted solutions can only be achieved throughclos co-operation of all possible partners and services concerned.In our case this is: Ministry of the environment, EnvironmentalAdministration, SUDGAZ, Minett-Kompost, consulting engineers, …In Conclusion, the prior involvement of all possiblepartners and services is essential for a technically andeconomically optimized project.

Thank you for your attentionYour contact:Helge DorstewitzE-mail: h.dorstewitz@iglux.luTél.: +352 26 56 50 23Fax: +352 26 56 50 50