| 王煌平,张青,李昱,任丽花,栗方亮,罗涛,翁伯琦,王秋营.热解温度对畜禽粪便生物炭产率及理化特性的影响[J].农业环境科学学报,2015,34(11):2208-2214. |
| 热解温度对畜禽粪便生物炭产率及理化特性的影响 |
| Effects of Pyrolysis Temperature on Yield and Physicochemical Characteristics of Biochar from Animal Manures |
| 投稿时间：2015-05-12 |
| DOI：10.11654/jaes.2015.11.024 |
| 中文关键词: 温度 畜禽粪便 生物炭 理化特性 |
| 英文关键词: temperature animal manure biochar physicochemical characteristics |
| 基金项目:国家科技支撑计划课题(2012BAD14B15,2015BAD05B01);公益性行业(农业)科研专项(201303094) |
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| 中文摘要: |
| 以鸡粪、猪粪渣和牛粪为原料,采用室内密闭低氧制备生物炭,研究不同温度(350、450、550、650、750 ℃)下,畜禽粪便生物炭的产率和理化特性.结果表明,随着热解温度的升高,畜禽粪便生物炭灰分、pH、电导率、盐分、全P和全K含量逐渐增加,而炭化产率、挥发分含量、固定碳产率、全N含量逐渐降低,同时生物炭表面超微结构粗糙程度加剧.综合分析确定,获得高炭化产率和低氮损失的适宜热解温度为450 ℃,该温度下生物炭品质优劣依次为牛粪、猪粪渣、鸡粪.畜禽粪便生物炭具有较高pH和总养分含量,可作为酸性土壤调理剂和有机肥生产辅料. |
| 英文摘要: |
| Many studies have examined the effects of pyrolysis temperature on yields and physicochemical characteristics of biochars from plant residues with high carbon and low ash content. However, few reports have been focused on biochars from animal manure with high mineral nutrient content. In this work, selected animal manures(chicken manure, solid-liquid separated pig manure, cow dung) were used to investigate the effects of different temperatures(350, 450, 550, 650 ℃ and 750 ℃) on yields and physicochemical properties of biochars produced in a closed low-oxygen reactor using pyrolysis process. As pyrolysis temperature increased, ash content, pH, conductivity, salinity content, and total content of P and K increased, while biochar yields, volatile content, fixed-C yield, total N content decreased gradually. Temperature had significant negative correlation with biochar yield, fixed-C yield and total N content. At higher temperatures, the biochar particles became rougher. The optimum pyrolysis temperature for high biochar yields and low N loss was 450 ℃. At this temperature, the biochar quality was cow dung> pig manure >chicken manure. Utilizing chicken manure biochar needs paying more attention to its salt toxicity. With higher pH and nutrient content, livestock manure biochars could be used in amending acidic soils and for producing organic fertilizers. |
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