Quark deconnement at T_QCD ∼150 MeV is identied as the simulta- neous action of three independent mechanisms, all activating at the same temperature: (1) Compton wavelength deconnement at T_QCD, the thermal Compton wave- length λ_T ∼ℏ/m_q c(t_QCD)T equals the connement radius r_QCD; (2) Debye screening the colour electric potential is screened at distances > 1/m_D ∼1/(g_s T) by the quark-gluon plasma; (3) H−sector liberation at T_QCD, the tempera- ture is sucient to break the H−associator closure condition, freeing H−excitations from their three-body connement. The third mechanism is the sump-relevant one: H− liberation at t_QCD removes the H−anti-sump from the brane, implementing the 109 amplication of a0 in the master equation.Part of the One-Octonion Brane-Bulk Framework series. Anchor DOI: 10.5281/zenodo.19120873. Community: one-octonion-brane-bulk. Author: Bharathi Dasan Jagadeesan, M.D., University of Minnesota. ORCID: 0000-0002-1143-941X.