An economic analysis was performed on treatment options for pig manure in Ireland. Costs were based on a 500 sow integrated pig farm producing 10,500 m(3) of manure per year at 4.8% dry matter. The anaerobic digestion of pig manure and grass silage (1:1; volatile solids basis) was unviable under the proposed tariffs, with costs at (sic)5.2 m(-3) manure. Subsequent solid-liquid separation of the digestate would cost an additional (sic)12.8 m(-3) manure. The treatment of the separated solid fraction by composting and of the liquid fraction by integrated constructed wetlands, would add (sic)2.8 and (sic)4.6 m(-3) manure, respectively to the treatment costs. The cost analysis presented showed that the technologies investigated are currently not cost effective in Ireland. Transport and spreading of raw manure, at (sic)4.9 m(-3) manure (15 km maximum distance from farm) is the most cost effective option. (C) 2011 Elsevier Ltd. All rights reserved.