College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Bioresour Technol. 2018 Dec;270:368-376. doi: 10.1016/j.biortech.2018.09.023. Epub 2018 Sep 5.
This study investigated the effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting. Results showed that phosphogypsum reduced ammonia (NH) and methane (CH) emissions but increased nitrous oxide (NO) emission. Superphosphate simultaneously reduced NH, NO and CH emissions. Dicyandiamide markedly reduced NO emission during composting. Combination of phosphogypsum and dicyandiamide reduced CH and NO emissions by 75.6% and 86.4%, while NH emission was increased by 22.0%. Combination of superphosphate and dicyandiamide reduced NH, CH and NO emissions by 12.3%, 81.0% and 88.2%, respectively. More importantly, with the addition of 10% initial raw materials, phosphogypsum and superphosphate conserved nitrogen and improved compost quality by introducing additional nutrients.
本研究探讨了磷石膏、过磷酸钙和双氰胺对污水污泥堆肥中气体排放和堆肥质量的影响。结果表明，磷石膏减少了氨（NH）和甲烷（CH）的排放，但增加了氧化亚氮（NO）的排放。过磷酸钙同时减少了 NH、NO 和 CH 的排放。双氰胺在堆肥过程中显著减少了 NO 的排放。磷石膏和双氰胺的组合减少了 CH 和 NO 的排放，分别为 75.6%和 86.4%，而 NH 的排放增加了 22.0%。过磷酸钙和双氰胺的组合减少了 NH、CH 和 NO 的排放，分别为 12.3%、81.0%和 88.2%。更重要的是，在添加 10%初始原料的情况下，磷石膏和过磷酸钙通过引入额外的养分来保存氮并提高堆肥质量。
