高温快速发酵对鸡粪重金属形态分布及有机质含量影响
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(1.东北农业大学资源与环境学院,黑龙江 哈尔滨 150030;2.农业农村部环境保护科研监测所,农业农村部产地环境污染防控重点实验室 /天津市农业环境与农产品安全重点实验室,天津 300191;3.新疆农业大学草业与环境科学学院,新疆 乌鲁木齐 830052)

作者简介:

栾润宇(1994-),男,黑龙江哈尔滨人,硕士研究生,主要从事农业废弃物重金属污染治理方面的研究。E-mail:425095692@qq.com。

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基金项目:

基金项目:国家重点研发计划项目(2017YFD0801402);天津市自然科学基金重点项目(17JCZDJC34200)。


Effect of rapid-rate thermophilic fermentation on heavy metal fraction and organic matter content in chicken manure
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(1.College of Resources andEnvironment,Northeast AgriculturalUniversity,Harbin Heilongjiang150030;2.Agro -Environmental ProtectionInstitute,Ministry of Agriculture and Rural Affairs,Key Laboratory of Original Agro -Environmental Pollution Preventionand Control,Ministry of Agriculture and Rural Affairs/Tianjin key Laboratory of Agro -Environment and Agro-ProductSafety,Tianjin300191;3.College of Grassland and Environment Sciences,Xinjiang Agricultural University,Urumqi Xinjiang830052)

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    摘要:

    以鸡粪、玉米秸秆为主要原料,通过添加酵素进行好氧堆肥发酵试验,研究了不同温度和时间下堆肥 pH值、EC值、重金属含量与形态、腐殖质含量变化以及红外光谱特征。结果表明,与堆肥前相比,pH值随温度升高和时间的延长而增大,最大可增加 0.53个单位,而 EC值随堆肥时间延长表现为先增加后降低的趋势,在 85℃处理下最低。由于浓缩效应,重金属含量均不同程度增加,Cu、Zn、Cr、Cd和 As含量较堆肥前相比最大增幅分别达到35.6%、11.5%、35.0%、35.3%和23.8%。然而,重金属可交换态分配率则有所降低,残渣态比例相应增加,与堆肥前相比,鸡粪有机肥中Cu、Zn、Cr、Cd和 As钝化率分别为24.8%、26.0%、27.6%、26.9%和13.9%。高温处理下,胡敏酸和富里酸含量较低,胡敏酸 /富里酸(HA/FA)比值随着堆肥时间和温度增加而增大,且随着堆肥进程脂肪族、芳香族、羧酸类分子以及多糖类物质均有所减少。结果显示高温下(85℃)不仅加快堆肥发酵进程,而且可以有效钝化重金属,可达到无害化效果。

    Abstract:

    By using the chicken manure and corn straw as the main raw materials,the aerobic composting fermentationexperiments were carried out by addingenzymes.ThepH,EC,heavy metal content andfraction,humus content changesand infrared spectrum characteristics of compost were studied at different temperatures and times.The results showed that compared with pre-composting,the pH value increased with the increase of temperature and time,and the maximumincrease was 0.53units.The EC value first increased and then decreased with the compostingtime,and reached the lowestunder the treatment of85℃.Due to the concentration effect,the content of heavy metals increased to different extents.The maximum increases ofCu,Zn,Cr,Cd and As were35.6%,11.5%,35.0%,35.3% and23.8%,respectively.However,the distribution rate of exchangeable heavy metals was reduced,and the rate of residual fraction of heavy metalswas correspondinglyincreased.Compared with before composting,the immobilization rates ofCu,Zn,Cr,Cd and Asincreased by24.8%,26.0%,27.6%,26.9%,and13.9%,respectively.Under high temperaturetreatment,the contentsof humic acid and fulvic acid were low,and the ratio of HA/FA increased with the increase of compost time andtemperature.However,the amount ofaliphatic,aromaticmatter,carboxylicacid,and polysaccharide wasdecreased.The resultsabove indicated that high temperature(85℃)not only accelerates the compost fermentation process,but also effectivelyimmobilize heavymetals,so as to achieve wasteharmlessness.

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栾润宇,李佳佳,纪艺凝,闫翠侠,孙约兵.高温快速发酵对鸡粪重金属形态分布及有机质含量影响[J].中国土壤与肥料,2020,(2):232-240.

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  • 收稿日期:2019-04-22
  • 最后修改日期:
  • 录用日期:2019-06-07
  • 在线发布日期: 2020-05-07
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