Evaluation on greenhouse gas emission reduction of the whole county's promotion project of livestock and poultry manure resource utilization

In order to explore the change of greenhouse gas (GHG) emissions of manure disposal before and after the implementation of the whole county's promotion project of livestock and poultry manure resource utilization, referring to IPCC Guidelines for National Greenhouse Gas Inventories,, the accounting and assessment of the new manure disposal engineerings in X City was carried out. The results showed that the net carbon emission was 479.31 t (in terms of carbon dioxide equivalent, the same below) after project implementation according to the executed solution, and compared to that before project implementation, it was reduced by 21172.81 t. The carbon emission per unit of livestock waste disposal was reduced by 513.48 kg, a decrease of 97.79% after project implementation according to the executed solution. In terms of carbon emission from livestock manure disposal by different processing units, the carbon emission of aerobic composting was reduced by 50% compared with that of open-air manure storge, and the carbon emission of closed anaerobic fermentation was reduced by 83.04% compared with that of anaerobic oxidation pond. Based on the above evaluation results, it was recommended to apply the model of solid manure mulching aerobic compost, liquid manure closed storage fermentation and manure full return to the field, to further reduce the GHG emissions of manure disposal.