Международный опыт переработки осадков от очистки сточных вод
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Домантас Трацевичус, основатель НГО "Ziedinė economika" (Циркулярная экономика), представитель Европейской Компостной Сети в Литве, рассказал о принципах работы с биологически разлагаемыми отходами в европейских странах.
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Международный опыт переработки осадков от очистки сточных вод
- 1. Sustainable sewage sludge management 2017 m. rugsėjo mėn. 26 d. VšĮ „Žiedinė ekonomika“ (Vilnius, Lithuania)
- 2. Sewage sludge management in Lithuania prior 2005
- 3. Sewage sludge management in Vilnius 2005-2012
- 4. Sewage sludge management in Vilnius 2013-2015
- 5. Sewage sludge management in Vilnius 2016- 80 % 20 % Operational cost of composting sewage sludge < drying + using in agriculture
- 6. Sewage sludge management in other towns
- 7. Sewage sludge management in other towns: composting AD+composting composting composting composting composting composting composting composting composting composting composting
- 8. Sewage sludge management in other towns: drying AD+drying AD+drying AD+drying AD+drying AD+drying AD+drying AD+drying AD+drying
- 9. Sewage sludge management in other towns: to agriculture AD+AG AG AG AG AG AGAGAGAG AG AG AG AG AG AG
- 10. Experience of other countries (2016)
- 11. Experience of other countries (2016)
- 12. Phosphorus sources in agriculture
- 13. Vilnius and Minsk sewage sludge Со Ni Sr Cu Zn Cr+3 Cd Hg Fe Mn Беларусь* – 21,8 – 240 626 122 1,22 1,81 – –
- 14. Options for Minsk Agriculture • Operating cost: polymers • Return to soil nutrients: Carbon, Phosphorus and Nitrogen • Drawbacks: solluble heavy metals + pathogens Composting • Cost: polymers (min 17 % dry matter), asphalt site with drainage (7 ha), composting equipment • Operating cost: polymers + fuel+labour • Compost: city green waste and leaves • Return to soil nutrients: Carbon, Phosphorus and Nitrogen Incineration • Cost: polymers + 25 mln. Eur for drying site • Operating cost: 19-25 Eur/t • Dried sewage sludge energy potential: 10- 12 MJ/kg • Drawbacks: loss of nutrients
- 15. Why composting? 1. It is cheap: CAP+OP ~ 20-25 EUR/t 2. It solves green and wood waste issue 3. Pathogens and pharmaceuticals are destroyed during composting process 4. Heavy metals are immobilized – they are not bioavailable for plants 5. Return to soil nutrients – organic carbon, phosphorus and nitrogen
- 16. Circular economy solution Swedish certification system called REVAQ Operated by: -The Swedish Water and Wastewater Association -The Federation of Swedish Farmers -The Swedish Food Federation -The Swedish Food Retailers Federation In cooperation with Swedish Environment Protection Agency Systematic improvements – local upstream work: -Cadmium goal 2025: 17 mgCd/kgP (- 7 mgCd/kgP2O5) -Goals 2025 for 60 other metals -2500 organic substances has to be substituted at connected industries -Educating households
- 17. Circular economy solution -Cadmium in pain -Silver as biocides in clothing -Speed up REACH -Education to retailers purchasers -Ecolabel
- 18. Thank you for attention! Ло́жка дегтю по́ртит бо́чку мёда