Impressions from the site in 2005

Größe: px

Ab Seite anzeigen:

Download "Impressions from the site in 2005"

Viktoria Lisa Pohl
vor 8 Jahren
Abrufe

1 Introduction Hans-Peter Koschitzky, Oliver Trötschler, Versuchseinrichtung zur Grundwasser- und Altlastensanierung, Universität Stuttgart Stephan Denzel, dplan, Karlsruhe Claudia Purkhold, Stadt Karlsruhe, Umwelt- und Arbeitsschutz AquaConSoil 213, Barcelona April 213 Pilot Application () remediation planning site description thermally enhanced remediation steam-air injection pilot; what for? confirmation and design steam-air technology Remediation concept Remediation Monitoring (21/212) remediation concept sequential steam-air injection data monitoring surveillance and process control Process operation remediation progress and results Realization of thermally enhanced remediation and aftercare 2 Impressionen vom Standort Site Karlsruhe Durlach Impressions from the site in Slaughterhouse of 74 Dry cleaner 3 4

2 Site Karlsruhe Durlach Pilot Site Karlsruhe Durlach gallery and artist s workshop 5 6 Contamination Geology and remediation concept Groundwater contamination: plume: > 3 m PCE concentration up to µg/l Contaminant source PCE Former dry cleaner: Leaking sewage system below the historical building PCE in the unsaturated zone, capillary fringe and saturated zone (silt, clay 5 m b.g.s.) PCE max. 3.8 mg/kg in vadose zone 6 mg/l in groundwater S-A-injection: 7-8 m b. g.s. max. 2 kg/h SVE: 1 - m³/h GW-pumping (cooling water) 1-3 m³/h O. Trötschler, H.-P. Koschitzky, Steffen Ochs, Stephan Denzel 7 8

building PCE in the unsaturated zone, capillary fringe and saturated zone (silt, clay 5 m b.g.s.) PCE max. 3.

3 Pilot field installation 7,8 4,24 injection well 1,,9 Implementation of pilot remediation 3 months duration four different phases: (1) cold SVE and groundwater pumping (5 days) (2) air-sparging (7 days) (3) steam-air injection (28 days) (4) Cooling phase: air-sparging, SVE und gw pumping (5 weeks) measurement 1,27,11,5 2,5 2,91 3,1 Target of remediation extraction wells Grundwass er, (Br38) Abwasser Frischwass er Bodenluft pf-luft Bodenluft vadose zone saturated zone (conduction) (convective) Con steam-air injection Bo d32 P3 FSL1, h=1.1 mbodenluft Br38 Dam cooling phase stationary heating heating up air - injection Air Sparging WT1 + KA 2, Air-Sparging soil vapor extraction (SVE) FIR 4..7, h = 1.5 m C1, h = 1.2 m 1m groundwater pumping C2, h =.5 m 2m 3m 4m 5m Anlagenco nta Schrauben iner 1, frostsicher in 2 ft. Ausfüh spindelkom pressor Durchfluss DL-Injektio messtechn n S it ik L Anl day 48 h h days Contaminant removal 7 days 2 h regulation of steam rate concentration (g/m³) 24 h days Steam expansion monitoring days PCE (g/m³) Sum of CHC (g/m³), dplan mass CHC (kg) Sum PCE (kg) Sum CHC (kg), dplan

Abwasser Frischwass er Bodenluft pf-luft Bodenluft vadose zone saturated zone (conduction) (convective) Con steam-air injection Bo d32 P3 FSL1, h=1.

4 ( ) Summary of pilot application Steam propagation > 4 m radius initial phase of maximum steam rate required time required is dominated by conductive heating of the silt layers 4 6 weeks of reduced steam-air rate to heat up silt 44 kg PCE via SVE & 1 kg via GW removed: - cold SVE: 7 kg - air-sparging: 3 kg - steam-air: 34 kg acceleration factor for steam-air of about 5 safe design and cost estimation for full site remediation Remediation goal and concept full scale 1.6 m³ of soil to be treated in-situ 1 months of steam-air injection 3 kw of steam injection power Implementation of full scale remediation same as pilot (1) cold soil vapour extraction and groundwater pumping all compartments (1 week) (2) air-sparging (each compartment) (3) steam-air injection (6 weeks, each compartment) (4) cooling phase: air-sparging and gw pumping 6 weeks) Remediation: implementation Steam injection under the uilding BLA-Hor T-Hor T-EK5 EK 5 (S2) SI 4.1 E 7 (S2) 16 St. Pt1 T-E7 4 Hor-1 T1 SI 4.2 Hor-2 EK 11 (S4) SI 3.2 T-EK11 Hor-3 T9 T11 T8 T-E4 E 4 (S2) T14 SI 3.1 Hor-4 SI SI 3.1 Hor-5-3,5m E 1 (S4) T-E1 T13 E 12 T-EK3 EK 3 (S1) SI 3.2 T7 Hor-6 T6T5 Hor-7 T4 Hor-8 SI 2.2 SI T3 Hor-9-3,5m EK 9 (S4) T-EK9-3, m SI 1.1 SI 1.2 T-E2 E 2 (S1) T-EK1 EK 1 (S1) T2 SI 1.2 SI 2.2 SI 1.1 SI 2.1 Hor-1 T1-7m Hor-11 1 Hor-12 T12-3,5m Hor-13 Hor-14 E 8 (S4) Hor- T- B 7 (GW-Infiltration) Hor-16 dplan, UT, Site owner: Stadt Karlsruhe Remediation planning and contracting: consultant dplan (& ) Operation: üblin Umwelttechnik Scientific assistancy, monitoring and remediation control: & dplan Advisory board RP-Ka, City of KA, EPA (LUBW) of Baden- Württemberg A - SÜD A-south injection wells SI SI , - 2, - 3, - 4, - 5, - 6, - 7, - 8, - 9, - 1, monitoring E 2,4,8,1 bzw. EK 1,3,9 f S - m S G, m - g S 1 m 2 m 3 m 4 m 5 m Groundwater Auff üll ung fillings fine sand coarse sand Soil vapour U, f s B o d e n p l a t t e Steam one BLA- Brunnen Wirkungsbereich DL-Injektion range of steam SVE wells Fundament proj , 6 5 m ü N N B L A - H O R Steam one Wirkungsbereich DL-Injektion steamed zone Groundwater " A n d e r S t a d t m a u e r " Soil vapour NG supply Gas Telecomm Telefon unication Strom power Wasser lines GWwater Spi egel GW-Spiegel supply groundwater B L A - B r u n n e n building H a u s soil vapour wells K o m b i - B r u n n e n combinedwell s SVE and groundwater A' 16

estimation for full site remediation Remediation goal and concept full scale 1.

5 Remediation control and decision criteria Drilling works and wells construction Control and balances Controll of steam expansion and heat using 12 thermocouples in the subsurface Control and monitoring CHC and BTE in soil vapour extraction (all lines, single wells and treatment) Criteria of closure treatment of a compartment 1. target of 87 C to be achieved in saturated zone (azeotropic TCE-PCE-water) 2. Concentration of contaminant in SVE falling short of 2 mg/m³ and remaining constant or falling compartment successfully treated switch to next field 17 Photo: Steffen Hetzer, UT Photo: Steffen Hetzer, UT Photo: Steffen Hetzer, UT 18 Betrieb Mai - Juli 21 Temperature development during remediation Groundwater and soil vapour extraction, activated carbon filter Exhaust chimny SVE Extraction well and measurement 19 2

target of 87 C to be achieved in saturated zone (azeotropic TCE-PCE-water) 2.

6 Heat propagation: compartment 2 Heat propagation: compartment Contaminant removal by SVE Development of CHC in groundwater 23 24

7 Summary and some numbers of full scale remediation Summary and some numbers of full scale remediation Total duration incl. drilling works 7 weeks Duration of remediation 42 weeks (ca. 3 weeks steam-air injection) Contaminant removal mass 5 kg CHC, (5 kg incl. pilot) Remediation goals achieved concerning CHC concentration (1 mg/m³ in soil vapour, << 1 µg/l in groundwater) Reduction of indoor contamination - before: CHC up to 1 mg/m 3 - during and after: CHC = mg/m 3 costs total budget ca % drilling and construction - % consumables, energy (mainly gas for steam production) - 5% for plants installation and operation specific costs: ~ 18 /to soil Impressive reduction of groundwater contamination - before: 6. µg/l - two years after: < 5, µg/l bis n.n. Energy balance 47 kwh/m³ soil (84% heat; 16% electric) total consumption: 78 MWh (thermical energy), 3 MWh electrical energy 26 Impressionen vom Standort.. at the very end.. Thanks to all involved partners for the good and team work and cooperation hans-peter.koschitzky@iws.uni-stuttgart.de The site after the remediation ( ) Dr.-Ing. Hans-Peter Koschitzky & Oliver Trötschler, Versuchseinrichtung zur Grundwasser- und Altlastensanierung, Universität Stuttgart 27 28

pilot) Remediation goals achieved concerning CHC concentration (1 mg/m³ in soil vapour, << 1 µg/l in groundwater) Reduction of indoor contamination - before: CHC up to 1 mg/m 3 - during and after:

Ähnliche Dokumente

Solar Air Conditioning -

Bavarian Center of Applied Energy Research Solar Air Conditioning - Research and Development Activities at the ZAE Bayern Astrid Hublitz ZAE Bayern, Munich, Germany Division: Technology for Energy Systems