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Analysis Of A Model For The Treatment Of Wastewater By The Activated Sludge Process, Simon D. Watt, Harvinder S. Sidhu, Mark I. Nelson
Analysis Of A Model For The Treatment Of Wastewater By The Activated Sludge Process, Simon D. Watt, Harvinder S. Sidhu, Mark I. Nelson
Faculty of Informatics - Papers (Archive)
We investigate a model for the treatment of wastewater in the activated sludge process. This process is based on the aeration of waste water with flocculating biological growth, followed by the separation of treated waste water from biological growth. Part of this growth is then wasted, and the remainder is returned to the system. The wastewater reactor is assumed to be well mixed, so the mathematical formulation for this process can be represented by a continuously stirred tank reactor with recycle. This system is analysed by combining steady-state analysis with path-following techniques. In practice, wastewater is treated by a sequence …
Mathematical Analysis Of Self-Heating In Compost Piles, Harvinder S. Sidhu, Mark I. Nelson, Nadeem Ansari, Xiao Dong Chen
Mathematical Analysis Of Self-Heating In Compost Piles, Harvinder S. Sidhu, Mark I. Nelson, Nadeem Ansari, Xiao Dong Chen
Faculty of Informatics - Papers (Archive)
We model the increase in temperature in compost piles or landfill sites due to micro-organisms undergoing exothermic reactions. The model incorporates the heat release due to biological activity within the pile and the heat release due to the oxidation of cellulosic materials. The heat release rate due to biological activity is modelled by a function which is a monotonic increasing function of temperature over a particular range and followed by a monotone decreasing function of temperature. This functionality represents the fact that micro-organisms die or become dormant at high temperatures. The heat release due to the oxidation reaction is modelled …
The Design And Analysis Of Multi-Phase Plant Breeding Experiments, A B. Smith, P Lim, Brian R. Cullis
The Design And Analysis Of Multi-Phase Plant Breeding Experiments, A B. Smith, P Lim, Brian R. Cullis
Faculty of Informatics - Papers (Archive)
Despite the importance of selection for quality characteristics in plant improvement programmes, literature on experimental design and statistical analysis for these traits is scarce. Most quality traits are obtained from multi-phase experiments in which plant varieties are first grown in a field trial then further processed in the laboratory. In the present paper a general mixed model approach for the analysis of multi-phase data is described, with particular emphasis on quality trait data that are often highly unbalanced and involve substantial sources of non-genetic variation and correlation. Also detailed is a new approach for experimental design that employs partial replication …