One　of　the　latest　developments　in　biocementation　is　the　use　of　one-phase-low-pH　MICP　or　EICP　method　as　a　more　effective　and　efficient　alternative　to　the　traditional　two-phase　method　for　the　treatment　of　sandy　soil.　However,　the　one-phase-low-pH　method　has　its　own　limitation.　The　pH　of　the　solution　has　to　be　adjusted　before　every　treatment.　In　this　study,　a　modified　one-phase-low-pH　MICP　or　EICP　method　is　proposed　in　order　to　simplify　the　treatment　procedure　to　improve　the　efficiency　of　biotreatment　in　real　constructions.　In　this　method,　the　low-pH　bacteria　or　urease　solution　is　only　used　together　with　the　cementation　solution　(i.e.,　CaCl2　and　urea)　for　the　first　treatment　and　for　the　subsequent　treatment,　only　cementation　solution　is　used.　The　test　results　show　that　using　the　modified　one-phase-low-pH　MICP　method　with　a　bacterial　solution　of　a　volume　ratio　of　0.75　is　comparable　to　that　using　the　original　one-phase-low-pH　method,　and　80%　of　the　calcium　conversion　efficiency　can　be　maintained　for　up　to　5　treatments.　However,　the　modified　one-phase-low-pH　EICP　method　may　only　be　used　for　the　first　2　or　3　treatments　due　to　the　relatively　poor　durability　of　urease　enzyme　in　inducing　calcium　carbonate　during　the　subsequent　injections　of　cementation　solution.