Foaming　agents　as　a　combination　of　several　components　are　usually　used　as　soil　conditioning　during　earth　pressure　balance　shield　(EPBS)　tunnelling.　These　residues　in　waste　EPBS　muck　lead　to　a　series　of　new　challenges　for　in-situ　recycling,　i.e.,　foams　overflow　flocculation　tank.　This　study　investigates　the　effects　of　residual　foaming　agent　components　and　defoamers　on　defoaming-flocculation-filterpress　characteristics　of　EPBS　muck　using　an　improved　flocculation　and　filterpress　system.　Residual　foam　height　(Hf),　defoaming　ratio　(DFR),　antifoaming　ratio　(AFR),　total　suspended　substance　(TSS),　turbidity,　moisture　content　(MC),　and　zeta　potential　(ZP)　were　selected　as　characterization　indices.　The　microstructure　of　filterpress　cakes　was　analyzed　using　a　scanning　electron　microscope.　Results　demonstrate　that　an　enhancement　within　0.0-1.0wt.%　for　sodium　fatty　alcohol　polyoxyethylene　ether　sulfate　(AES)　and　alpha　olefin　sulfonate　(AOS)　significantly　reduces　DFR　and　AFR.　The　MC　and　ZP　decline,　while　the　Hf　and　turbidity　enhance.　The　combinations　of　nonionic　surfactants　alkyl　polyglycoside　(APG)　and　fatty　alcohol-polyoxyethylene　ether　(AEO)　in　a　concentration　range　of　0.0-1.0wt.%　with　0.2wt.%　AES　causes　the　Hf,　DFR,　AFR,　turbidity,　and　ZP　to　exhibit　absolutely　different　variations.　The　MC　with　the　growth　in　both　APG　and　AEO　presents　a　trend　of　first　decreasing　and　then　increasing.　By　increasing　foam　stabilizers　sodium　carboxymethyl　cellulose　(CMC)　and　guar　gum　(GG)　within　0.02-0.10wt.%,　the　AFR,　TSS,　and　ZP　enhance　in　varying　degrees,　while　the　Hf,　DFR,　and　MC　gradually　reduce.　With　the　increase　of　defoamers　hydroxyl　silicone　oil-glycerol　polyoxypropylene　ether　(H-G)　and　dimethyl　silicone　oil-glycerol　polyoxypropylene　ether　(D-G)　within　0.002-0.010wt.%,　the　DFR　and　AFR　are　significantly　improved,　while　the　TSS,　turbidity,　MC,　and　ZP　display　varying　degrees　of　reduction.　Moreover,　defoaming-flocculation-filterpress　mechanisms　of　EPBS　muck　are　explored　to　provide　a　useful　reference　for　actual　in-situ　recycling　projects.　©　The　Author(s),　under　exclusive　licence　to　Springer-Verlag　GmbH　Germany,　part　of　Springer　Nature　2024.