Energy　uncoupling　is　often　used　for　sludge　reduction　because　it　is　easy　to　operate　and　does　not　require　a　significant　amount　of　extra　equipments　(i.e.　no　additional　tank　required).　However,　over　time　the　supernatant　extracted　using　this　method　can　deteriorate,　ultimately　requiring　further　treatment.　The　purpose　of　this　study　was　to　determine　the　effect　of　using　a　low-pressure　ultrafiltration　membrane　process　for　sludge　water　recovery　after　the　sludge　had　undergone　an　energy　uncoupling　treatment　(using　3,3′,4′,5-tetrachlorosalicylanilide　(TCS)).　Energy　uncoupling　was　found　to　break　apart　sludge　floc　by　reducing　extracellular　polymeric　substances　(EPS)　and　adenosine　triphosphate　(ATP)　content.　Analysis　of　supernatant　indicated　that　when　energy　uncoupling　and　membrane　filtration　were　coapplied　and　the　TCS　dosage　was　below　30　mg/L,　there　was　no　significant　deterioration　in　organic　component　removal.　However,　ammonia　and　phosphate　concentrations　were　found　to　increase　as　the　concentration　of　TCS　added　increased.　Additionally,　due　to　low　sludge　concentrations　and　EPS　contents,　addition　of　30-60　mg/LTCS　during　sludge　reduction　increased　the　permeate　flux　(two　times　higher　than　the　control)　and　decreased　the　hydraulic　reversible　and　cake　layer　resistances.　In　contrast,　high　dosage　of　TCS　aggravated　membrane　fouling　by　forming　compact　fouling　layers.　In　general,　this　study　found　that　the　co-application　of　energy　uncoupling　and　membrane　filtration　processes　represents　an　effective　alternative　method　for　simultaneous　sludge　reduction　and　sludge　supernatant　recovery.　[Figure　not　available:　see　fulltext.].　©　2020,　Higher　Education　Press　and　Springer-Verlag　GmbH　Germany,　part　of　Springer　Nature.