| 胡伟桐,余雅琳,李喆,崔春红,周立祥.不同调理剂对生物沥浸污泥堆肥氮素损失的影响[J].农业环境科学学报,2015,34(12):2379-2385. |
| 不同调理剂对生物沥浸污泥堆肥氮素损失的影响 |
| Effects of Different Organic Bulking Agents on Nitrogen Loss During Composting of Dewatered Bioleached Sludge on a Commercial Scale |
| 投稿时间：2015-07-01 |
| DOI：10.11654/jaes.2015.12.018 |
| 中文关键词: 生物沥浸污泥 堆肥 有机调理剂 氨气挥发 |
| 英文关键词: bioleached sludge composting organic bulking agent ammonia volatilization |
| 基金项目:国家863计划课题(2012AA063501);国家自然科学基金(21177060,21277071) |
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| 中文摘要: |
| 选取稻壳、麦糠和菇渣与稻壳混合物作为有机调理剂,进行生物沥浸污泥条垛式堆肥,研究不同调理剂对堆肥效果及氨气释放规律的影响。结果表明,在堆肥过程中,以麦糠作为调理剂能够提高堆肥温度,延长高温阶段(>50 ℃)持续时间,加快有机物和粗纤维的降解,堆肥产品种子发芽指数(GI)超过90%,麦糠促进了生物沥浸污泥堆肥快速腐熟。随着堆肥的进行,添加混合调理剂的处理减少了氨气挥发,累计氨气挥发量仅为麦糠处理的31%,是稻壳处理的54%;堆肥产品总氮含量较堆肥前增加23.6%,高于稻壳和麦糠处理。分析表明,菇渣较大的内部面积和疏松多孔的结构使其具有较强的氨气吸附能力,达到吸附饱和后,总氮含量可达干重的5.1%.菇渣是降低生物沥浸污泥堆肥氨气挥发、减少氮素损失的优良有机调理剂。 |
| 英文摘要: |
| In this study, the effects of different organic bulking agents on ammonia volatilization and composting process were studied during windrow composting of bioleached dewatered sludge. The bulking agents included rice hull, wheat bran, and mixture of mushroom residue with rice hull. Composting of bioleached sludge with wheat bran yielded the highest composting temperature, the longest high-temperature(> 50 ℃) duration, and the greatest organic matter decomposition rate. The cabbage seed germination index(GI) in this compost product was greater than 90%. It demonstrated that wheat bran was an efficient bulking agent for accelerating maturity during bioleached sludge composting. However, mushroom residue and rice hull mixture reduced ammonia emissions, resulting in cumulative ammonia emission 69% lower than that of the composting system with wheat bran, and 46% lower than that of the composting system with rice hull. Consequently, total N content in compost products with mushroom residue and rice hull mixture agent was 23.6% higher than before composting, and also higher than that from the compost products with rice hull or wheat bran. Scanning electron microscope showed that mushroom residue was of porous structure and high specific surface area, facilitating ammonia adsorption. The nitrogen content in dry mushroom residues was up to 5.1% when the adsorption was saturated. Therefore, mushroom residue should be a superior bulking agent for bioleached sludge composting. |
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