Effect of C/N ratio, aeration rate and moisture content on ammonia and greenhouse gas emission during the composting

Avaliação de novas práticas de compostagem em pequena escala com aproveitamento energético

“…Temperaturas significativamente menores foram observadas nos compartimentos A em relação aos C e D, o que pode ter contribuído para os 10% de composto adicionado como inóculo nesses compartimentos, amenizando sua temperatura, por melhorar a porosidade e consequentemente a oxigenação dos RSO, da mesma forma como observado em solos, nos quais a adição de composto favorece a formação de grânulos (KIEHL, 1998 JIANG et al, 2011;KIEHL, 1998 Miller (1993). …”

Closing the nutrient loops in (peri-)urban farming systems through composting

“…emissions by 70 -90% and N2O emissions by 37 -43% from composting, as noted by Jiang et al (2011), Vu et al (2015) and Chowdhury et al (2014). Different mechanisms explain the effect of high C:N materials on reducing N losses and GHG emissions from composting.…”

“…Studies have shown that the total N loss can increase by over 88% during excessive aeration compared to optimal aeration (Chowdhury et al, 2014;Jiang et al, 2011). Similarly, Cook et al (2015) observed that frequent turning of the compost pile (i.e., three times per week) more than doubled the total N losses compared with less frequent turning (i.e., once a week).…”

“…Similarly, Cook et al (2015) observed that frequent turning of the compost pile (i.e., three times per week) more than doubled the total N losses compared with less frequent turning (i.e., once a week). Aeration reduces CH4 emissions from composting (Chowdhury et al, 2014;Jiang et al, 2011), but its effect on N2O emissions remains controversial. Studies have shown a stimulation effect (Jiang et al, 2011), inhibition effect (Shen et al, 2011) and no effect (Chowdhury et al, 2014) of aeration on N2O production.…”

“…Aeration reduces CH4 emissions from composting (Chowdhury et al, 2014;Jiang et al, 2011), but its effect on N2O emissions remains controversial. Studies have shown a stimulation effect (Jiang et al, 2011), inhibition effect (Shen et al, 2011) and no effect (Chowdhury et al, 2014) of aeration on N2O production. High NO3 -production via nitrification -which leads to N2O production through nitrifier denitrification -explains the high N2O production with increasing aeration.…”