Analysis f landfill gas migratin using autnmus gas mnitring platfrms Fiachra Cllins, Dylan Orpen, Crmac Fay, Dermt Diamnd CLARITY: Centre fr Sensr Web Technlgies Natinal Centre fr Sensr Research Dublin City University Dublin 9, Ireland ICSW 2012: Philadelphia, PA. 12 th March 2012
Cntents Wh are we? Mtivatins Landfilling in Ireland Landfill gas generatin Platfrm technlgy Landfill gas data analysis Cnclusins
www.clarity-centre.rg www.dcu.ie/chemistry/asg/ Gas sensing Water sensing Adaptive Sensrs Grup
Mtivatins 1. Reductin in greenhuse gas pllutin [1, 2] 2. Optimised management /utilisatin f gas-generative surces 3. Eliminate hazardus, cstly and cntrversial scial risks - 33M landfill fire clean-up in Irish midlands [3 ] Kerdiffstwn, Kildare: Jan/Feb 2011 [1] Directive 2008/50/EC f 21 May 2008 n ambient air quality and cleaner air fr Eurpe, E.P. and C.E.U., 2008. [2] Kyt Prtcl, Infrmatin Unit n Climate Change, U.N.,1998 [3] SKM Envirs, Appendix 7: Cst scenaris. Eval. env. liabilities at Kerdiffstwn landfill. Available nline: http://www.epa.ie/dwnlads /pubs/ther/envlia/ker/ (accessed 29 July 2011).
Landfilling in Ireland The numbers: Natinal rate: 2 millin tnnes per annum (2008) = ~1.2 kg/persn/day 48 pen facilities Maximum landfill capacity will be reached in 2020 Odrus landfill gas accunted fr ~71% f all cmplaints in relatin t licensed facilities (2009) Surce: Fcus n landfilling in Ireland. The Envirnmental Prtectin Agency. 2010
Landfill gas generatin Magnitude dependent n numerus factrs: age, waste type, envirnmental cnditins Generated gas is extracted fr flaring r pwer generatin (if CH 4 > 50% vl.) Gas migratin measured in perimeter brehle wells: threshld limits f 1.0% /1.5% vl. fr CH 4 / CO 2
Platfrm technlgy 5 6 3 Cmpnents: 1. Micrcntrller circuitry 2. Gas extractin 3. Infrared CH 4 and CO 2 gas sensrs 4. GSM cmmunicatin 5. 12V 5Ah lead acid battery (10 weeks @ fur samples/day) 6. IP68-rated weatherprf casing 2 1 4
Analyte surce Physical wrld in-situ measurement Gateway Digital wrld wireless telemetry Internet Data access CLARITY prtal Fusin tables
Target gas cncentratin [%v/v] Landfill gas mnitring 80 70 60 50 40 30 20 10 CO2 cncentratin CH4 cncentratin CO2 threshld limit CH4 threshld limit GA2000 CO2 validatin GA2000 CH4 validatin 0 4/2/11 26/3/11 15/5/11 4/7/11 23/8/11 12/10/11 Duratin 253 days/6072 hrs 890 measurements Validatin checks with GA2000 n 20/04/11, 16/08/11, 16/10/11 > 98 % accuracy fr all checks
Barmetric pressure [mbar] Rainfall [mm] SCADA flw [m 3 /30 min] SCADA CH4 [% v/v] Gas cncentratin [%v/v] Data analysis 80 60 Brehle avg CO2 Brehle avg CH4 40 20 0 4000 SCADA flwrate SCADA CH4 3000 2000 1000 0 1050 1040 Barmetric pressure Rainfall 1030 1020 1010 1000 990 03/03/2011 08/03/2011 13/03/2011 18/03/2011 23/03/2011 28/03/2011 02/04/2011 70 60 50 40 30 20 10 0 14 12 10 8 6 4 2 0
Barmetric pressure [mbar] Target gas cncentratin [%v/v] Data cnclusins Overall reductin in gas levels ver the mnitring perid 80 70 60 50 40 30 20 10 0 CO2 cncentratin CH4 cncentratin CO2 threshld limit CH4 threshld limit GA2000 CO2 validatin GA2000 CH4 validatin 4/2/11 26/3/11 15/5/11 4/7/11 23/8/11 12/10/11 Gas levels with increased extractin Gas levels when barmetric pressure and rainfall 1050 1040 1030 1020 1010 1000 990 3/3/11-10/3/11 23/3/11-31/3/11 0 10 20 30 40 50 60 70 80 Brehle methane levels [% vl. cncentratin] Psitive feedback frm regulatrs and peratrs in terms f data accessibility and usefulness
On-ging wrk Distributed netwrk f multiple platfrms GEN3 develpment (cst reductin, pwer lngevity, mdularity in sensrs and cmms) Cmmercialisatin
Thank yu fr yu attentin This wrk has been supprted by, EPA, Ireland: grant 2010-ET-MS-10 & SFI: grant cde 07/CE/I1147