A　cost-effective　process,　consisting　of　a　denitrifying　upflow　anaerobic　sludge　blanket　(UASB),　an　oxygen　limited　anoxic/aerobic　(A/O)　process　for　short-cut　nitrification,　and　an　anaerobic　reactor　(ANR)　for　anaerobic　ammonia　oxidation　(anammox),　followed　by　an　electrochemical　oxidation　process　with　a　Ti-based　SnO2-Sb2O5　anode,　was　developed　to　remove　organics　and　nitrogen　in　a　sewage　diluted　leachate.　The　final　chemical　oxygen　demand　(COD),　ammonia　nitrogen　(NH4+-N)　and　total　nitrogen　(TN)　of　70,　11.3　and　39　(all　in　mg/L),　respectively,　were　obtained.　TN　removal　in　UASB,　A/0　and　ANR　were　24.6%,　49.6%　and　16.1%,　respectively.　According　to　the　water　quality　and　molecular　biology　analysis,　a　high　degree　of　anammox　besides　short-cut　nitrification　and　denitrification　occurred　in　A/0.　Counting　for　16.1%　of　TN　removal　in　ANR,　at　least　43.2-49%　of　TN　was　removed　via　anammox.　The　anammox　bacteria　in　A/0　and　ANR,　were　in　respective　titers　of　(2.5-5.9)　x　10(9)　and　2.01　x　10(10)　copy　numbers/(g　SS).　(C)　2016　Elsevier　Ltd.　All　rights　reserved.