School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment (SKLUWER), Harbin Institute of Technology, Harbin 150090, China; School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2015 Aug;190:516-21. doi: 10.1016/j.biortech.2015.03.104. Epub 2015 Apr 6.
In this study, the impacts of reused and sucrose-decorated pumice as bulking agents on the composting of sewage sludge were evaluated in the lab-scale reactor. The variations of temperature, pH, NH3 and CO2 emission rate, moisture content (MC), volatile solid, dissolved organic carbon, C/N and the water absorption characteristics of pumice were detected during the 25days composting. The MC of pumice achieved 65.23% of the 24h water absorptivity within the first 2h at the mass ratio of 0.6:1 (pumice:sewage sludge). Reused pumice increased 23.68% of CO2 production and reduced 21.25% of NH3 emission. The sucrose-decorated pumice reduced 43.37% of nitrogen loss. These results suggested that adding pumice and sucrose-decorated pumice in sludge composting matrix could not only adjust the MC of materials, but also improve the degradation of organic matters and reduce nitrogen loss.
在这项研究中，我们评估了重复使用和蔗糖修饰浮石作为膨松剂对实验室规模的污水污泥堆肥的影响。在 25 天的堆肥过程中，检测了温度、pH 值、NH3 和 CO2 排放速率、水分含量 (MC)、挥发性固体、溶解有机碳、C/N 以及浮石的吸水性的变化。在质量比为 0.6:1（浮石：污水污泥）的情况下，浮石的 MC 在头 2 小时内达到了 24 小时吸水率的 65.23%。重复使用的浮石增加了 23.68%的 CO2 生成量，减少了 21.25%的 NH3 排放量。蔗糖修饰的浮石减少了 43.37%的氮损失。这些结果表明，在污泥堆肥基质中添加浮石和蔗糖修饰的浮石不仅可以调节材料的 MC，还可以促进有机物的降解，减少氮素损失。
