城市沼渣堆肥工艺及其施肥技术的优化

为探讨缩短城市沼渣堆肥时间,提高堆肥效率和沼渣施肥技术,采用二步法对好氧堆肥工艺进行物料配比中试试验,开展毛豆种植的沼渣施肥试验.研究结果表明:调理剂菇土、稻壳、木屑可以促进堆肥效率;堆体初期24 h,它们比对照组的温度分别提高8,5,3 ℃,产品水的质量分数分别减少45%,38%,14%,种子发芽率指数分别提高10%,8%,7%,产品粒度分别减少54%,34%,20%;毛豆种植配施沼渣有机肥与对照施肥比较,产量增加9.4%,土壤渗漏水硝态氮、总磷质量浓度分别减少13.4%,21.6%,配施沼渣有机肥有利

Studies on Composting Process of Municipal Biogas Residues and Optimization of Fertilizer Practice

To study how to shorten the composting time and enhance the composting efficiency and fertilizer practice of municipal biogas residues, fertilizer test of soybean planting was carried out on aerobic composting process to advance pilot test of material ratio by two-step method. The results showed that adding mushroom soils, rice husk and sawdust as conditioners could improve the composting efficiency. Compare with the control group, the temperature increased by 8, 5, 3 ℃, the water ratio of product decreased by 45%, 38%, 34%, the seed germination index increased by 10%, 8%, 7%, and the particle size reduced by 54%, 34%, 20% respectively in the initial 24 h. The output of green soybean increased by 9.4% than the control group when using biogas residues as organic fertilizer, and the concentrations of nitrate nitrogen and total phosphorus in soil percolating water decreased by 13.4% and 21.6% respectively. It can be clearly seen that fertilizing biogas residues as organic fertilizer is beneficial to increasing the yield of green soybean and reducing the loss of nitrogen and phosphorus in the vegetable fields.