摘要
阐明畜禽粪便厌氧发酵过程中磷在固、液相中含量变化,对畜禽粪便养分管理极为重要。以猪粪和奶牛粪为发酵原料,在中温([37±2)℃]条件下,采用连续流动搅拌反应器(CSTR)进行了130d厌氧发酵试验,分析厌氧发酵过程中磷元素的总量及其在固体和液体中的分布变化。结果表明,猪、牛粪发酵后总磷损失率分别为2.96%和2.44%。猪粪和牛粪沼渣(即总出料的固体与残留在反应器内的固体总和)中的总磷量分别为进料(含本底值)总磷量的95.95%和91.96%。与进料相比,猪粪发酵后随沼液排出的总磷在液体中的含量降低了77.35%,在固体中的含量降低了29.95%;而牛粪总磷在液体中的含量降低了79.47%,在固体中的含量增加了38.66%。猪粪和牛粪发酵后的沼液中可溶性磷含量降低了79.04%和78.77%。经厌氧发酵后,猪、奶牛粪中的磷元素会由液相向固相迁移。
It is important to study the distribution characteristics of phosphorus in solid and liquid phase of animal manure after anaerobic digestion treatment for nutrients management.For this reason,the effect of anaerobic digestion on phosphorus transformation and distribution of pig and dairy manure were studied.Changes of total phosphorus content and its distribution in liquid and solid phase of input and output materials were analyzed in the study.The experiments was conducted at（37±2）℃ by continuous stirred tank reactor（CSTR） for 130 d.Daily biogas yield,cumulative biogas yield,methane content,pH value,total and soluble phosphorus in liquid and solid phase of input and output materials were analyzed.The results showed that phosphorus was lost slightly after anaerobic digestion and the phosphorus loss ratio of pig and dairy manure were 2.96% and 2.44%,respectively.After anaerobic digestion,rate of total phosphorus（TP） mass in solid phase to TP mass in input material of pig and dairy manure were 95.95% and 91.96%,respectively.Compared to input material,TP content of pig manure in liquid fraction and in solid fraction of output were decreased by 77.35% and 29.95%,while TP content of dairy manure in liquid fraction was decreased by 79.47% and TP content in solid fraction was increased by 38.66%.Soluble phosphorus of animal manure was used by anaerobic microbial during anaerobic digestion and its content of pig and dairy manure were decreased by 79.04% and 78.77%,respectively.The results indicated that phosphorus was transferred from liquid fraction to solid fraction during anaerobic digestion and about 50% of phosphorus of pig manure was remained in anaerobic bioreactor while the rate of dairy manure was only 18.6%.It means that it is necessary to remove the sludge of bioreactor regularly for biogas project in pig farm.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2013年第1期179-184,共6页
Journal of Agro-Environment Science
基金
农业部公益性行业计划(200903011-01)
关键词
厌氧发酵
沼渣
沼液
磷
畜禽粪便
anaerobic digestion
biogas residue
biogas slurry
phosphorus
livestock manure
作者简介
作者简介：付广青（1984-），女，河北石家庄人，硕士，主要从事农业废弃物资源化利用方面的研究。E-mail：fu__guangqing@126．com
通信作者：常志州E—mail：czhizhou@hotmail．com
