De Vaal, Philip L.2013-09-072006-12-202013-09-071999-11-012007-12-202006-12-20a 1999 H90/thhttp://hdl.handle.net/2263/30440Dissertation (M Eng (Control Engineering))--University of Pretoria, 2007.Please read the abstract in the section 00front of this document© University of Pretoria 1999 H 90/Chemical engineeringUnit processesUCTDControl of an acid sulphite batch pulp digester based on a fundamental process modelDissertationhttp://upetd.up.ac.za/thesis/available/etd-12202006-100726/