Sustainability HomeEnvironmentSustainability The large volume of bio-waste processed by College Group facilities represents a significant percentage of the national throughput. Alternatives to rendering can potentially have the following issues: On-site burial or landfill Negative impact on water quality; groundwater contamination; leaching (e.g. chloride, ammonium, nitrate, E. coli); poor biosafety; potential for carcasses to explode from methane build-up (cattle bloat). It can take 25 years for carcasses to decompose. Outdoor incineration Releases heavy metals into the air; emits pollutants (e.g. sulphur dioxide, carbon monoxide, nitrogen oxide); airborne toxins can easily reach human food and water supply; poor biosafety. Composting Accumulation of antibiotics, growth promoters, vaccines, and agricultural chemicals; can concentrate naturally occurring heavy metals; releases CO2 and methane; poor biosafety. Composting bones is very difficult and there are limited uses for the resulting compost. Anaerobic digestion Leaves large quantities of residual fat; water-intensive process; produces prions and heat-resistant bacteria; seepage; poor biosafety. Digesters work best as a small, local solution, which is generally not logistically or economically viable. Headquarters College Road, Nobber, Co. Meath, A82 XT61, Ireland Farragh Monnery Upper, Crossdoney, Co. Cavan, H12 X7P9, Ireland Contact Us About Us About College Group Meet the team CSR History Products & Services Process Category 1 Products Category 3 Products College Biodiesel FOG Collections The Enviroment Sustainability Carbon Footprint Technology Latest Blogs College Group Low Carbon Pledge Award and presentation of College Group Bursary 2018 © 2020 College Group - Closing The Bio-Waste Circle