水泡粪物料中固体和氨氮含量对厌氧消化产气特性的影响 |
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引用本文: | 梅凯,;董红敏,;陶秀萍,;孟海玲. 水泡粪物料中固体和氨氮含量对厌氧消化产气特性的影响[J]. 中国农业气象, 2014, 0(6): 622-627 |
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作者姓名: | 梅凯, 董红敏, 陶秀萍, 孟海玲 |
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作者单位: | [1]安徽工业大学建筑工程学院,马鞍山243032; [2]农业部设施农业节能与废弃物处理重点实验室/中国农业科学院农业环境与可持续发展研究所,北京100081 |
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基金项目: | 国家973计划资助项目 |
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摘 要: | 目前不少猪场使用水泡粪清粪工艺清理猪粪便,同时对水泡粪清理的粪污进行沼气工程处理,但不同水泡粪贮存条件对其粪污后续厌氧发酵的影响尚不清楚.本试验将猪粪和尿液通过不同贮存温度(20℃,30℃)和时间(7d,14d,21d)组成6种前处理条件,模拟不同条件水泡粪出水,研究水泡粪物料特性对出水厌氧发酵的影响.结果表明,水泡粪出水的单位挥发性固体(VS)的厌氧发酵产气率在369.2 ~702.0mL/g,厌氧发酵前7d的日产沼气量一直处于较高水平,之后快速下降,厌氧发酵10d后产气基本处于较低水平且下降平缓;氨氮对厌氧发酵有显著的抑制作用,厌氧消化甲烷产率(y)与氨氮浓度(x)的关系为y =4×10-5x2-0.3618x+1283(R2=0.9846).水泡粪物料总固体物含量越高厌氧发酵产气越低,据此建议适当缩短水泡粪时间以提高后续厌氧发酵产气量.
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关 键 词: | 猪粪 水泡粪 厌氧消化 沼气 甲烷产率 |
Effects of the Characteristics of Deep-pit Effluent on Anaerobic Digestion of Swine Manure |
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Affiliation: | MEI Kai ,DONG Hong-min,TAO Xiu-ping ,MENG Hai-ling ( 1. Shool of Construction Engineering, Anhui University of Technology, Ma'anshan 243032, China ;2. Key Laboratory of Energy Conservation and Waste Management in Agricultural Structures, MOA/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081 ) |
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Abstract: | Deep-pit system is a commonly used method for swine manure collection, and the collected waste is then trea- ted using biogas engineering. However, there is a lack of information about the effects of deep-pit conditions on the fol- lowing anaerobic digestion of the effluents. In this study, swine manure and urine were collected and mixed, and the mixture was stored under six different condition formed by 3 storage temperatures of 20℃ and 30℃ and 3 storage times of 7,14 and 21d to produce deep-pit effluents,which were used as suhstrate to investigate the effects of the characteris- tics of deep-pit effluents on anaerobic digestion. The results showed that the daily averaged methane production rate (MPR) of the deep-pit effluents ranged from 369.2 to 702.0mL/g ,and the daily average MPR kept at high level during the first 7 days into trials, and then dropped rapidly and reached a lower level on the 10 clays of digestion process, after that the daily average MPR kept at relatively lower level and decreased very slowly. Ammonia nitrogen exhibited inhibi- tion effects on MPR, and the relation between methane yield per VS and ammonia nitrogen could be expressed as y = 4 ×10-5x2 -0. 3618x + 1283 (R2 = 0.9846). The higher the TS content of deep-pit effluent, the lower methane production. Therefore, it is possible to improve methane production of anaerobic .digestion via shortening the storage period of swine manure in deep-pit. |
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Keywords: | Swine manure Deep-pit Anaerobic digestion Biogas Methane yield |
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