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

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 Animal Solid enhancer manure fraction Composting Physical seperation Fertilizer Liquid Spreading over land fraction Dischargeable water Constructed wetlands Nutrient reduction through biological treatment Dischargeable Anaerobic digestion water Tempus Overlegplatform water Overlegplatform water ������������� Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen � �������������� ���������

I. General Introduction IVPV Tempus Faculty of Bioscience engineering

Constructed wetlands Cascade of plant- & microbial based processes Tempus IVPV Faculty of Bioscience engineering

Constructed wetlands Rich diversity of plant species and substrates Tempus IVPV Faculty of Bioscience engineering

Constructed wetlands “Intelligent design”: control in function of crucial monitoring parameters, feed forward & feedback loops IVPV Tempus BIWA workshop Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen

II. Treatment to dischargeable water IVPV Tempus Faculty of Bioscience engineering

Constructed wetlands Liquid fraction after biology Effluent Constructed Wetlands < 15 mg/l total nitrogen 300 mg/l total nitrogen < 2 mg/l totaal phosphorus 250 mg/l total phosphorus 3000 mg/l COD < 125 mg/l COD IVPV Tempus BIWA workshop Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen

Constructed wetlands VLAREM standard N content IVPV Tempus BIWA workshop Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen

III. Project overview: water re-use IVPV Tempus Faculty of Bioscience engineering

Water scarcity & water re-use Animal ‣ sufficient water supply is one of the most manure important environmental and economical challenges in agriculture in the near future Physical separation ‣ use of purified water on the farm is scarce Liquid ‣ is reuse of end effluent of constructed wetlands fraction an option? Dischargeable Nutrient reduction by water biological treatment Constructed wetlands Tempus IVPV BIWA workshop Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen

Project � 5 different CW locations, monthly sampling � physico-chemical parameters (non-limitative list) SS EC pH P tot ortho-P NTU hardness N tot NO 2 NO 3 NH 4 BOD COD Ca Mg K Na F Cl SO 4 Al Cd Cu Fe Mn Ni Pb Zn Co Cr � bacteriological parameters C. perfringens Enterococci total Coliforms Salmonella E. coli colony count (37° C) spores sulfite red. Clostridia colony count (22° C) � reuse options (high & low grade) drinking water live stock cleaning water irrigation cooling water IVPV Tempus Overlegplatform water Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen Faculteit Bio-ingenieurswetenschappen

IVPV Tempus Faculty of Bioscience engineering

ICH – 0,5 ha Wetland area GI – 3 ha Prim. & Sec. Manure treatment Pig farm PI – 1 ha WVL– 3 ha LA – 0,5 ha

Results - compared to pig drinking water � Overall excellent results � Problem parameters � Location Ex. Other spore elements: mainly below DL IVPV Tempus Overlegplatform water Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen Faculteit Bio-ingenieurswetenschappen

Conclusions ‣ preliminary results indicate that effluent quality scores better than initially anticipated, both for the bacteriological as well as the physicochemical parameters. ‣ 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. IVPV Tempus Gebruikerscommissie 100520 Tussentijdse vergadering 100402 BIWA workshop Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen

On site polishing Tempus Faculty of Bioscience engineering

Future perspectives Biomass for energy Algae production Aquaculture Biodiversity IVPV Tempus Overlegplatform water Faculty of Bioscience engineering Faculteit Bio-ingenieurswetenschappen