We study the double-charged vector-bilepton pair production and double-charged scalar-bilepton pair production via p+p→Y +++Y-+X and p+p→S1+++S1 - +X, where Y and S 1 are vector and scalar bileptons, respectively, in the framework of the minimal version of the 3-3-1 model. We compute the photon, Z, and Z ′ s-channel contributions for the elementary process of bilepton scalar pair production, and to keep the correct unitarity behavior for the elementary qq̄ interaction, we include the exotic quark t-channel contribution in the vector-bilepton pair production calculation. We explore a mass range for Z′ and we fix the exotic quark mass within the experimental bounds. In this model, the vector-bilepton mass is directly related to MZ′and we consider scalar mass values around the vector-bilepton mass. We show that the total cross section for vector-bilepton production is 3 orders of magnitude larger than for scalar pair production for √s=7TeV and 14TeV and we obtain the number of events for the proposed LHC luminosities as a function of the bilepton mass. In addition we present some invariant mass and transverse momentum distributions. When comparing these distributions we observe quite different behavior providing the determination of the bilepton nature. We conclude that one can disentangle the production rates and that the LHC can be capable of detecting these predicted particles as a signal for new physics. © 2011 American Physical Society.