1. Research and development of constructed wetland technology in Ireland and the world
Yaqian Zhao (赵亚乾)
University College Dublin (爱尔兰都柏林大学)
Changan University (长安大学)
5 Nov 武汉大学

5. About myself
Prof. Yaqian Zhao is School Head of Research & Innovation of Civil Engineering, University College Dublin. He is a Director of Water & Effluent Lab. and a Principal Investigator with the UCD Earth Institute.
BEng. (1984 in 兰州铁道学院）
MEngSc. (1990 in兰州铁道学院)
PhD (2000 in University of Strathclyde, UK)
Postdoc ( in Queen’s University Belfast, UK)
BEng, MEngSc,
PhD, MIEI in Water &
Wastewater Eng.
He is actively engaged in teaching, research and postgraduate supervision in the areas of wastewater treatment with special interests in R&D of lost-cost and environmentally friendly technologies (constructed wetlands, sludge beneficial reuse).

6. Professional activity
“Wat. Sci. & Technol.”(Assoc. Editor）(2010--)
“Journal of Environmental Science and Health, Part A” (Editorial
board member) (2012--)
“International Journal of Environmental Studies” (Editorial board
member) (2009--)
“Waste and Biomass Valorization”(Editorial board member)
(2009--)
“Journal of Water Sustainability”(Editorial board member)
(2011--)
中国给水排水 （2015--）
37 journal reviewer:
“Environ. Sci. Technol.”, “Water Research” etc.

7. Novel constructed wetland system (CWs) for high strength wastewater treatment

8. Pathways of removal of pollutants from water passing through a wetland
Constructed wetland
Uptake by plants
Volatilisation
Rhizofiltration
inflow
outflow
water
substrate
Precipitation/binding (biological/
chemical/
physical)
Pathways of removal of pollutants from water passing through a wetland

9. Constructed wetland
From David Cooper:

10. Currently used substrates in CWs
Soil Sand Gravel

11. Construction
Usually plastic liner – PVC, LDPE, HDPE thickness 0.5 – 1.0 mm
Clay with hydraulic conductivity < 10-8 m/s

12. Bed substrate placement (Mořina, Czech Republic)

13. Phalaris
Phragmites

14. Planting, Phalaris arundinacea

15. Seville, Spain

16. Kreuzer, Austria after 1 year of operation Photo: Martin Regelsberger

17. Trnovany, Czech Republic, 6 PE, bakery

18. Photo: Martin Regelsberger
Kreuzer, Austria, 15 PE

20. Waylight, Australia industrial wastewaters 53 000 m2
Photo courtesy Dave Wood

21. Czech Republic, photo by Jan Vymazal

22. 3-chamber septic tank as pretreatment
160 pe connected
3-chamber septic tank as pretreatment
vertical flow CW with 800 m² total surface,
Austria
Reminder size,
rather large plant for Austrian standards
1000 masl area with hard winters

23. Currently used substrates in CWs
Soil Sand Gravel

24. Regarding CW research…√

25. Novel constructed wetland system (CWs) for high strength wastewater treatment

26. Alum sludge
◆ Alum sludge is an inevitable by-product from water treatment process.

27. Easily, locally & largely available
Alum sludge
◆ Alum sludge in Ireland:
15,000 – 18,000 t (dried solids)/pa
As a waste
Landfilled
Easily, locally & largely available

28. Model wetland
Effluent tank
Influent tank
Pump
Electrical mixer

29. Alum sludge-based CW system

30. Alum sludge-based CW system