the de-watering (the removal of water from) anaerobic digestion (AD) digestate (what is left after digestion) from facilities
dad-ddyfrio sef tynnu'r dŵr o weddillion treuliad anaerobig (yr hyn sy'n weddill ar ôl i rywbeth gael ei dreulio) sy'n dod o gyfleusterau treulio anaerobig