Efisiensi pengolahan Lindi menggunakan anaerobic baffled reactor (ABR) dengan hydraulic retention time (HRT) 3 dan 4 hari: studi kasus: lindi TPA Cipayung = Efficiency of leachate treatment by using anaerobic baffled reactor (ABR) with hydraulic retention time (HRT) 3 and 4 days: case study leachate final disposal Cipayung