There are frequent public buses from the central bus and train station of Odense to the University campus.
You can use the Journey Planner.
Busses in Odense between the railway station and hotels in the city centre to and from the conference site: bus line numbers 41-44 from Odense Railway Station (‘Odense Banegård’ or ‘OBC’), destination University Campus Odense (‘Universitetet’, ‘SDU’ or ‘Syddansk Universitet’). Stand B at the station.
For fares forth and back to the university you can buy single tickets, all-day tickets and 10-trip cards on the busses by cash, 25 Danish Kroners (DKR) per trip (and change of bus within a one hour time limit). The bus company is Fynbus: http://www.fynbus.dk/ .
It is a one hour walk from the city center to the university (for instance along ‘Rødegårdsvej’ route), or 20 minutes on a bicycle. Ask at the hotel for bicycle rent, a cosy tour through Odense’ neighborhoods.
Bicycling: Denmark is a country of bicycling. Most places there are special tracks for bicycles along the streets and often special tracks through the countryside. Rent a bike: http://www.visitodense.com/ln-int/funen/bike-rental/bicycle-rental-odense or ask at the hotel.