Phoslock Environmental Technologies Limited · ASX:PET

Phoslock Environmental Technologies — Technical Presentation (February 2008)

22 slides from Phoslock Environmental Technologies's technical presentation, Feb 18, 2008

  1. Slide 1: First results of Bentophos - applications in Germany

    ® First results of Bentophos - applications in Germany • Introduction and Preliminary Application Results Dr. Said Yasseri / Nicolai Nowak Phoslock Seminar in Stockholm 18th February 2008

  2. Slide 2: Issues for lake restoration

    Issues for lake restoration: ƒ effective and sustainable nutrient elimination ƒ minimal / no toxic effects ƒ cost- / benefit-ratio

  3. Slide 3: Bentophos®

    Bentophos® ƒ What is Bentophos®? ƒ What is Lanthanum? ƒ How effective is the phosphate bond and the the capacity of binding phosphate under real conditions? ƒ Lanthanum: eco-toxicity ? ƒ effective phosphorous reduction in water bodies ? ƒ effective chemical sediment capping ? ƒ Increase of permanent

  4. Slide 4: Bentophos® - technical Data

    Bentophos® - technical Data ƒbase material: bentonite (95 %-by weight) ƒmodification: enrichment with lanthanum- ions (La3+-Ions) •lanthanum-ions (embedded inside the bentonite-layers) as the active component (5 %-by weight) highly effective phosphate-bond ƒproduct: clay-like granules ƒcapacity of b

  5. Slide 5: Phosphate absorption capacity

    Phosphate-absorption pH 5 capacity 100 80 ads orbierter P [% ] of Bentophos® pH 7 60 Regression Messpunkte under different 40 20 pH- 100 0 80 a d s o r b ie r te r P [% ] conditions 60 0,1 1 Regression 10 [mg P/L] 100 1000 Messpunkte 40 20 pH 8,5 0 0,1 1 10 100 1000 100 [mg P/L] a d so rb ie rte r P

  6. Slide 6: Declining phosphorus concentration in water column after treatment

    Declining phosphorus concentration in water- column of a alkanity rich water after treatment Bentophos-Lab-Scale P-Precipitation Tests with Lake-Water (lake near Amstel) 0,2 0,18 0,16 total phosphorus [m g/L] 0,14 0,12 0,1 0,08 0,06 0,04 0,02 0 07 07 07 07 07 07 07 07 07 07 07 07 07 07 07 07 20 20 2

  7. Slide 7: Lanthanum in the environment

    Lanthanum in the environment ƒ Background concentration of lanthanum in different water body sediments: ~ 40 mg/kg dw. (source RIVM, NL) ƒ Geogenic lanthanum in Elbe river sediments: ~ 44 mg/kg dw. (source GKSS, D) ƒ Own findings: [mg/kg dw.] Silbersee 12 Otterstedter See 11 Ellisee 36 Webersee 43 B

  8. Slide 8: Bentophos® - toxicological Data

    Bentophos® - toxicological Data Tests regarding Luminiscent bacteria (ISO 11348-3) EC50 = 37 mg La/L the ecotoxicity of Daphnia magna (DIN 38412-L30) EC50 = 103 mg La/L lanthanum-ions Fish eggs (DIN 38415-T6) EC50 = 150 mg La/L in water: 100 80 for comparison: lanthanum-concentrations in the water b

  9. Slide 9: Uptake of Lanthanum-Ions in different fish tissues

    Uptake of Lanthanum-Ions in different fish tissues 02.05.2007 02.05.2007 02.05.2007 Otterstedter Otterstedter See Otterstedter See See Common eel skin muscle liver parameter method unit dryweight ISO 11465:1996-12 % 55.8 21.5 39.6 copper DIN 38406-E29:1999-05 mg/kg TS 2.6 1.0 120 zinc DIN 38406-E29:

  10. Slide 10: Ecotox test with fish egg

    Ecotox test with fish egg (acc. DIN 38415 Teil 6, modified as „Direct Contact“-Test) Schwanz Bentophos Herzschlag Summe der O2-Gehalt koagulierte keine Somiten nicht vom /Kavität pH-Wert nicht toten [mg/L] Eier (N) angelegt (N) Dotter [mg] feststellbar (N) Embryonen (%) abgelöst (N) 5 7 / / / / / 0

  11. Slide 11: Lanthanum characteristics

    Lanthanum BENTOPHOS ® Silbersee 0,12 characteristics 0,10 Lanthan ges. "gelöstes" Lanthan 0,08 • total lanthanum in water Lanthan [mg/L] decreased from 0,06 100 to 0 µg/L 0,04 • dissolved lanthanum in 0,02 water ranged about 20 to 0 µg/L 0,00 6 6 6 6 6 7 7 7 7 7 7 7 7 00 00 00 00 00 00 00 00 00 00 0

  12. Slide 12: Applications - Examples

    Applications - Examples • Silbersee: • artificial lake, area 9 ha, max. depth 8 m • eutrophied • intensive use as a recreational lake • regular bathing ban due to massive cyanobacterial blooms during the last years • high phosphate concentrations in sediment • Bentophos® application dose: 21.5 tons

  13. Slide 13: Technical Application - Principles

    Technical Application - Principles spraying on / raw material / granules preparation of a suspension injecting in the water body

  14. Slide 14: Technical Application - Settling

    Technical Application - Settling Start 5 min 0 0.2 0.4 0.8 1.6 3.2 g l-1 Data: Dr. Miquel Lurling, Univ. Wageningen 110 min. 24 h

  15. Slide 15: Silbersee phosphorus during deep water removal

    • Silbersee •during deep water removal phosphorus-conc. in Tiefenwasserentnahme water increased 1,80 P-Rücklösung ortho-Phosphat-P 18 from 0.29 to 1.70 mg/L 1,60 Gesamtphosphor 16 •ortho-phosphate 1,40 14 fraction 1,20 12 P-Fracht [µg P/Ld] Phosphor [mg/L] 1,00 10 take share up to 100 % 0,80 8 of to

  16. Slide 16: Silbersee results

    •Silbersee • ortho-phosphate decreased below detection limit after 3 weeks (<0.01mg/L) • total-phosphorus content dropped 85 % down to 28 µg/L • decrease of P- concentrations to predicted limits • no swimming ban during 2007

  17. Slide 17: Silbersee and Otterstedter See sediment phosphorus

    •Silbersee: P [%] P-Bindungsformen im Sediment des Silbersees (0 - 10 cm Tiefe) refraktärer org. P 0 10 20 30 40 50 60 70 80 90 100 säurelabiler organischer P •sediment contain approx. 1000 kg phosphorus 3 Apatit/Carbonat basenlöslicher P Al/Fe-Oxide •initially 40 % as biogenic phosphorous 2 organis

  18. Slide 18: Bärensee

    •Bärensee: • artificial shallow lake; 5 ha; max. depth 3.5 m • eutrophied • intensive use as a recreational lake • regular massive blue-green-algae blooms • chlorophyll-a concentration >80 µg/L (February ‘07) • phosphate permanently in use • aim: prevent phosphate from being released from the heavy

  19. Slide 19: Bärensee results

    •Bärensee • application at “suboptimal” conditions • ortho-phosphate decreased below detection limit after 2 weeks (<0.01mg/L) • total-phosphorus content dropped from 83 µg/L down to 25 µg/L within 6 month • Secchi depth visibility of >2m in feb. 2008 has not been reported during the last couple of

  20. Slide 20: Conclusions

    Conclusions 9 lanthanum is a ubiquitary element in sediments 9 fast and permanent binding of ortho-phosphate (PO4) 9 effective reduction of phosphorus at most water bodies characteristics 9 undiminished effect under anoxic conditions 9 wide pH range stability of lanthanum-phosphate 9 rather no influ

  21. Slide 21: Roadmap

    Roadmap ƒ further tests on ecotoxicological issues and long-term effectiveness of Bentophos ƒ lab-scale / mesocosm projects on sensitive environments ƒ full-scale projects on highly eutrophied ecosystems (5 applications confirmed for 2008 in D, 2 confirmed in NL) ƒ Involve and support scientific res

  22. Slide 22: Institut Dr. Nowak

    Institut Dr. Nowak • private limnological Institute • founded (1972), directed by: Dr. Karl-Ernst Nowak (grad. at MPI for Limnology Plön, Prof. W. Ohle) • first studies on Phosphate elimination at a wastewater treatment facility in 1971 • lab for environmental analysys, accreditation in accordance w

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