In this research, the feasibility of biogas production from CL was studied exhaustively and co-digestion potential with agro-industrial wastes, food wastes from neighbouring sources were examined. The ACoD of CL with these wastes have not been reported before.
This study had utilised compositional analysis to determine how combining agro-industrial wastes with CL results in substrates that are better balanced in terms of nutrients (i.e. C/N) and degradation. The relationship between lignocellulosic properties at balances C/N has been explored which was not studied before. The kinetic parameters that could be used to predict the substrates combination for ACoD were also explained.
There is no literature on the chemical pre-treatments of CL especially which include the effect of pre-treatment on the digestate fractions and degradability. Pre-treatment is well suited for CL and WS with high degradation. No published paper focuses on using combinations of AKP+DAP pre-treatment of CL and WS in an integrated system (e.g. sequential chemical pre-treatments and ACoD) and these methods exert a positive effect on solid removals. There is little research, if any, on the ACoD of CL with FW and agro-industrial wastes for different total solids loadings, C/N ratios and their effect on methane yield especially in terms wastes available in Australian context.
From engineering point of view, this research has contributed in developing models for waste optimisation as well as pre-treatment of lignocellulosic wastes. It has also developed a new method that has shown correlation between C/N ratio and lignocellulosic fractionation. It also developed a new way for successful semi solid
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anaerobic co-digestion from CL using pre-treatment of lignocellulosic wastes and acclimatisation of inoculum.
AD and biogas production is one of the most promising areas in the field of environmental engineering. Although, CL has high biogas yield, currently there is no successful biogas plant from CL in large scale. Therefore, this research will contribute in this area where agro-industrial wastes and food wastes would be utilised with CL. In a broader context, advance resource recovery technologies will be researched which will be directly applicable to Australian agro-industrial wastes management and resource recovery.
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