针对餐厨废弃物堆肥腐殖酸不稳定易降解的问题，研究生物炭添加对餐厨废弃物堆肥腐殖酸形成的影响。一共设置两个处理(CK，不添加生物炭;BC，按照堆体干质量添加5％生物炭)，整个堆肥周期持续15 d。堆肥结束时，BC的还原糖、氨基酸、多酚分别为2。05、1。57、2。25 mg/g，分别比CK低1。97、0。68、0。43 mg/g;BC的胡敏酸(HA)、HA/富里酸(FA)(质量比)分别为17。04 mg/g、1。85，较 CK 提升了 61。21％、110。23％。BC 的气单胞菌(Aerococcus)、土地芽孢杆菌(Terribacillus)、蜡样芽孢杆菌(Cerasiba-cillus)、巨球菌(Macrococcus)、Tepidanaerobacter 相对丰度比 CK 高 0。30、0。04、0。01、0。01、0。03 百分点，土芽孢杆菌(Geobacillus)、小多孢菌(Micropolyspora)相对丰度比CK分别低0。79、0。16百分点。结果表明添加生物炭有利于:(1)还原糖、氨基酸、多酚向腐殖酸的转化;(2)促腐微生物(气单胞菌、土地芽孢杆菌、蜡样芽孢杆菌、巨球菌、Tepidanaerobacter)的生长;(3)堆肥的腐殖化。本研究对生物炭在餐厨废弃物肥料化上的应用以及堆肥腐殖化具有重要意义。
Effect of biochar addition on the formation of humic acid and microbial evolution in food waste composting
To address the issue of unstable and easy degradation of humic acid in food waste composting,the effect of biochar addition on the formation of humic acid in food waste composting was studied.A total of 2 treatments were set up(CK,no biochar added;BC,5％biochar added according to the dry weight of the pile),and the entire composting cycle lasted for 15 days.At the end of composting,the reducing sugars,amino acids,and polyphenols treated with BC were 2.05,1.57 and 2.25 mg/g,respectively,which were 1.97,0.68 and 0.43 mg/g lower than those treated with CK.The HA and HA/FA(mass ratio)treated with BC were 17.04 mg/g and 1.85,respectively,which increased by 61.21％and 110.23％compared to CK.The relative abundance of Aerococcus,Terribacillus,Cerasibacillius,Macrococus,and Tepidanaerobacter treated with BC was 0.30,0.04,0.01,0.01 and 0.03 percentage points higher than that of CK,while the relative abundance of Geobacillus and Micropolyspora was 0.79 and 0.16 percentage points lower than that of CK.The results showed that biochar addition was beneficial for:(1)the conversion of reducing sugars,amino acids,and polyphenols into humic acids;(2)promoting the growth of microorganisms(Aerococcus,Terribacillus,Cerasibacillus,Macrococus,Tepidanaerobacter);(3)humification of compost.This study was of great significance for the fertilization application of biochar in food waste and composting humification.
万方数据
维普
