can a former female inmate who just got released visit a current male inmate in the ERDCC?

Probably not, but these decisions are determined on a case-by-case basis. Normally, the rule is that felons cannot be approved for visitation unless there is a solid reason or if the relation is inner-circle family members. You will need to contact the counselor, unit team manager or case manager at the detention center to get the information on what you'll have to go through to get approved.