Enrichment of anammox sludge by using an Internal Circulation Reactor innoculated with anaerobic granular sludge and old landfill leachate - Vang, Tam; Nguyen, Dan; Le, Thy; Le, Long; Pham, Anh; Le, Thanh; Tran, Hieu; Pham, Tran (VNUHCM Journal of Environment and Earth Sciences, 2023)