Climate Change Mitigation - Climate Resilient Agriculture for Ensuring Food Security - page 300

Fig. 13.11 Anaerobic digestion (Source: AgCert)

Fig. 13.12 Aerobic digestion (Source: Government of Alberta, Agriculture and Rural Development)

For some markets, and even some on-farm
application techniques, the compost would have
to be pelleted so that the nutrient content could be
upgraded to a specifi c blend with commercial
fertilizers.
Based on the IPCC ( 2007c ), for most animals,
worldwide, there is limited opportunity for
manure management, treatment, or storage;
excretion happens in the fi eld and handling for
fuel or fertility amendment occurs when it is dry
and methane emissions are negligible (Gonzalez-
Avalos and Ruiz-Suarez 2001 ). To some extent,

emissions from manure might be curtailed by
altering feeding practices or by composting the
manure, but if aeration is inadequate, CH 4
emissions during composting can still be sub-
stantial (Xu et al. 2007 ).
Technologies in manure management are
developing rapidly, and several countries in the
developing world are implementing them to a
certain extent. According to Brandjes et al.
( 1996 ), manure management systems are highly
diverse, among which the following can be
distinguished: