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猪粪及奶牛粪中温厌氧发酵对Cu和Zn的影响

靳红梅 付广青 常志州

靳红梅, 付广青, 常志州. 猪粪及奶牛粪中温厌氧发酵对Cu和Zn的影响[J]. 环境科学研究, 2015, 28(3): 474-480.
引用本文: 靳红梅, 付广青, 常志州. 猪粪及奶牛粪中温厌氧发酵对Cu和Zn的影响[J]. 环境科学研究, 2015, 28(3): 474-480.
JIN Hongmei, FU Guangqing, CHANG Zhizhou. Effects of Mesophilic Anaerobic Digestion of Pig and Dairy Manures on Cu and Zn[J]. Research of Environmental Sciences, 2015, 28(3): 474-480.
Citation: JIN Hongmei, FU Guangqing, CHANG Zhizhou. Effects of Mesophilic Anaerobic Digestion of Pig and Dairy Manures on Cu and Zn[J]. Research of Environmental Sciences, 2015, 28(3): 474-480.

猪粪及奶牛粪中温厌氧发酵对Cu和Zn的影响

基金项目: 国家自然科学基金项目(21107038);国家水体污染控制与治理科技重大专项(2012ZX07101-004);国家环境保护公益性行业科研专项(201209028)

Effects of Mesophilic Anaerobic Digestion of Pig and Dairy Manures on Cu and Zn

  • 摘要: 以猪粪和奶牛粪为发酵原料,在中温〔(37±2)℃〕条件下采用完全混合式厌氧反应器进行了158 d的室内试验研究,分析厌氧发酵过程中Cu和Zn在沼液中质量浓度的变化及其在沼渣中的赋存形态. 结果表明:①猪粪沼液中ρ(TCu)和ρ(TZn)(TCu和TZn分别为总Cu和总Zn)随发酵时间的增加逐渐升高,而奶牛粪沼液中二者变幅不明显. ②整个发酵过程中,猪粪沼液中ρ(TCu)和ρ(TZn)的平均值极显著低于进料(P<0.001),降幅分别为80%和43%;而奶牛粪沼液中二者降幅分别仅为11%和13%. ③猪粪和奶牛粪沼液中ρ(溶解性Cu)占ρ(TCu)的53%和43%,与进料相比有小幅降低;而猪粪和奶牛粪沼液中ρ(溶解性Zn)占ρ(TZn)的35%和19%,极显著高于进料(P≤0.01),增幅分别为109%和37%. ④猪粪和奶牛粪沼渣中Cu主要以可氧化态存在,Zn主要以残渣态和酸溶态/可交换态存在. 中温厌氧发酵对猪粪和奶牛粪中溶解性Cu和Zn的削减效果有限,并且沼渣中残渣态Cu和Zn的减少可能增加二者的生物有效性,因此不利于农田的直接利用.

     

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