Manure processing through constructed wetlands: past, present and - - PowerPoint PPT Presentation

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Manure processing through constructed wetlands: past, present and future Michels E., Meers E. February 24 2011 Tempus Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen Manure processing Soil

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Manure processing through constructed wetlands: past, present and future

Michels E., Meers E. February 24 2011

Tempus Faculty of Bioscience engineering

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Animal manure Solid fraction Liquid fraction Physical seperation Composting

Soil enhancer

Nutrient reduction through biological treatment

Dischargeable water

Constructed wetlands

Manure processing

Fertilizer

Spreading over land

Overlegplatform water

Anaerobic digestion

Dischargeable water

Tempus Faculty of Bioscience engineering

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IVPV

I. General Introduction

Tempus Faculty of Bioscience engineering

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IVPV

Cascade of plant- & microbial based processes

Constructed wetlands

Tempus Faculty of Bioscience engineering

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IVPV

Rich diversity of plant species and substrates

Constructed wetlands

Tempus Faculty of Bioscience engineering

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Constructed wetlands

“Intelligent design”: control in function of crucial monitoring parameters, feed forward & feedback loops

BIWA workshop IVPV Tempus Faculty of Bioscience engineering

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IVPV

II. Treatment to dischargeable water

Tempus Faculty of Bioscience engineering

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Constructed wetlands

< 15 mg/l total nitrogen < 2 mg/l totaal phosphorus < 125 mg/l COD 300 mg/l total nitrogen 250 mg/l total phosphorus 3000 mg/l COD Liquid fraction after biology Effluent Constructed Wetlands

BIWA workshop IVPV Tempus Faculty of Bioscience engineering

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Constructed wetlands

VLAREM standard N content

BIWA workshop IVPV Tempus Faculty of Bioscience engineering

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IVPV

III. Project overview: water re-use

Tempus Faculty of Bioscience engineering

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Animal manure Liquid fraction Physical separation Nutrient reduction by biological treatment

Dischargeable water

Constructed wetlands

Water scarcity & water re-use

BIWA workshop

sufficient water supply is one of the most

important environmental and economical challenges in agriculture in the near future

use of purified water on the farm is scarce
is reuse of end effluent of constructed wetlands

an option?

IVPV Tempus Faculty of Bioscience engineering

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Project

5 different CW locations, monthly sampling physico-chemical parameters (non-limitative list)

SS EC pH Ptot

rtho-P

NTU hardness Ntot NO2 NO3 NH4 BOD COD Ca Mg K Na F Cl SO4 Al Cd Cu Fe Mn Ni Pb Zn Co Cr

bacteriological parameters

C. perfringens

Enterococci total Coliforms Salmonella

E. coli

colony count (37° C) colony count (22° C) spores sulfite red. Clostridia

reuse options (high & low grade)

drinking water live stock cleaning water irrigation cooling water

IVPV Tempus Faculty of Bioscience engineering

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IVPV Tempus Faculty of Bioscience engineering

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ICH – 0,5 ha PI – 1 ha LA – 0,5 ha GI – 3 ha WVL– 3 ha

Wetland area

Prim. & Sec. Manure treatment

Pig farm

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Results- compared to pig drinking water

Overall excellent

results

Problem parameters Location

Ex. Other spore elements:

mainly below DL

IVPV Tempus Faculty of Bioscience engineering

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen

Tussentijdse vergadering 100402

Conclusions

preliminary results indicate that effluent quality scores better than

initially anticipated, both for the bacteriological as well as the physicochemical parameters.

Gebruikerscommissie 100520

even for high grade applications

constraints for reuse were limited to parameters which are easy to address using simple polishing steps.

we expect that reuse of constructed

wetland effluent in various applications will have important economical and environmental benefits.

BIWA workshop IVPV Tempus Faculty of Bioscience engineering

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Tempus Faculty of Bioscience engineering

On site polishing

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Overlegplatform water Faculteit Bio-ingenieurswetenschappen IVPV

Future perspectives

Biodiversity

Biomass for energy

Algae production Aquaculture

Tempus Faculty of Bioscience engineering