Effects on Physicochemical Properties of Poultry and Cattle Manure Composts to Different Mixing Ratios of Activated Rice Hull Biochar for Aerboic Digestion Process

The aerobic digestion for the composting process of livestock manure is the most widely used recycling method. Accordingly, research for efficient and high-quality compost production has been actively conducted. During the composting process, the addition of activated biochar can maintain a higher temperature and a water holding capacity with having the good quality compost. Therefore, the objective of this experiment was to evaluate the changes of physicochemical properties for the aerobic composting process of poultry and cattle manure according to the mixing ratio of activated rive hull biochar. For the production of manure compost, the treatments of activated rice hull biochar were set at 0%, 5%, 10%, and 15%, respectively, during composting the poultry and cattle manure. Assessment of maturity for producing the manure composts was evaluated through changes of temperature, water holding capacity, pH, and C/ N ratio. For producing the good quality compost, an optimum mixing rate was 10% of activated rice hull biochar during composting, considering the physicochemical properties of composts.