A full-scale unit would be constructed in the workshop of the department of Chemical Engineering, University of Natal. The unit is then to be relocated to the Northern Waste Water Treatment Works and coupled to one of their two digestors. Equipment will be modified, if necessary, until consistent blockage-free operation is achieved. In the second, stage the performance of the full-scale unit will be compared to fluxes etc. achieved on the single tube tests. Discrepancies will be addressed until the full-scale unit performs as per the design specifications. Thereafter the effects of the coupled process on the digestor hydrodynamics would be investigated. The biomass concentration of the digestor would be slowly and progressively increased. At increasing concentrations, the residence time distribution of the digestor would be determined. Simultaneously, the flow distribution would be modeled using the computational fluid dynamics (CFD) techniques. If any serious maldistributions occur as a result of the increased concentration, effort will focus on developing engineering solutions, guided by predictions from the CFD model. In the last stage, process automation and control will be addressed, thereafter the process will be operated continuously as a demonstration unit.