English AGROVOC
uf
Wastewater purification
BT
Waste disposal
BT
Waste management
RT
Activated sludge
RT
Pollutant load
RT
Processing
RT
Wastewater
RT
Water purification
(Lao)
ການບຳບັດນ້ຳເປື້ອນ
(French)
Traitement des eaux usées
(Spanish)
Tratamiento de aguas residuales