Treatment of separated piggery anaerobic digestate liquid using woodchip biofilters

  title={Treatment of separated piggery anaerobic digestate liquid using woodchip biofilters},
  author={K N Carney and Michael Rodgers and Peadar G. Lawlor and Xinmin Zhan},
  journal={Environmental Technology},
  pages={663 - 670}
The Irish nitrates directive restricts the land area suitable for landspreading of pig manure, so anaerobic digestion warrants consideration. In this study, six identical Lodgepole pine woodchip biofilters were set up to treat the separated liquid fraction of digestate after anaerobic digestion of pig manure. Two hydraulic loading rates were examined: 5 L/ m 2/d (LLR) and 10 L/ m 2/d (HLR). Following a start-up period of 70 days, an average of 90% and 71% of -N was removed at LLR and HLR… 
Growth and nutrient removal of Chlorella vulgaris in ammonia-reduced raw and anaerobically-digested piggery wastewaters
This study was aimed to investigate the possibility of using raw and anaerobically-digested piggery wastewater as culture media for a green microalga Chlorella vulgaris (C. vulgaris). Due to high
Nutrient Recovery from Digestate of Anaerobic Digestion of Livestock Manure: a Review
Animal manure is often anaerobically digested for the purpose of producing biogas. The digested manure, namely digestate, can be applied onto farmlands to enhance crop yields as it is abundant in
Using Chemically Enhanced Primary Treatment (CEPT) as a Pretreatment Option for Anaerobic Digestate from Cattle Manure Digestion System
Anaerobic digestate from cattle manure fermentation may pose a threat to the environment. How to stabilize the digestate’s characteristics so that they do not disturb the bio-system is a critical
The impact of chemically amended pig slurry on surface runoff, leachate and greenhouse gasses.
In Ireland, the pig industry is concentrated in a small number of counties. Pig farms typically have a high stocking rate. Therefore, the disposal of slurry in a cost-effective and
Struvite production from anaerobic digestate of piggery wastewater using ferronickel slag as a magnesium source
To fully recover ammonia contained at a high concentration in anaerobic digestate of piggery wastewater (ADPW) by forming struvite, ferronickel slag (FNS) and K2HPO4 were used and the economic feasibility of FNS was assessed by estimating chemical costs of various magnesium sources.
Recovery of ammonia through struvite production using anaerobic digestate of piggery wastewater and leachate of sewage sludge ash
Both ammonia and phosphorus were recovered by adding leachate of sewage sludge ash (SSA) into ADPW and the obtained struvite was found to meet the Korean fertilizer standards, except for copper.
An overview of Irish pig production, research and knowledge transfer since 1960
Pig production in Ireland has gone through enormous changes during the past 60 yr, from pigs being primarily produced as a sideline on dairy farms, to an industry with one of the highest average
Treatment of Piggery Wastewater Using Woodchip Biofilters


Denitrification in wood chip bioreactors at different water flows.
Wood chip bioreactors may be successful at removing significant quantities of nitrate-nitrogen, and reducing NO(3)-N concentration from water moving to subsurface drainage at flow rates observed in central Iowa subsoil.
Nitrogen Elimination Mechanisms in an Organic Media Aerated Biofilter Treating Pig Manure
Simultaneous nitrification and denitrification, proved by N2 production, became the principal mechanism after some time, and part of the influent nitrogen was retained in the system during the first 150 days, due to filtration, sorption and assimilation.
Pig manure treatment by organic bed biofiltration
Denitrification of a Nitrate-Rich Synthetic Wastewater Using Various Wood-Based Media Materials
  • M. Healy, M. Rodgers, J. Mulqueen
  • Engineering
    Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering
  • 2006
The horizontal flow filter with a woodchippings/sand mixture and an influent NO3-N concentration of 60 mg L−1, which operated over a study duration of 166 days, performed best, yielding a 97% reduction in NO3 -N at steady-state conditions.