A new approach for biogas slurry disposal was put forward in this study through converting biogas slurry to the organic fertilizer of Spathiphyllum. The biogas slurry was firstly concentrated by vacuum distillation to reduce its volume by 80% who is called 5CBS, and then CO₂ saturated to reduce its pH to about 6.50 ± 0.20. With or without adding the exogenetic Ca, Mg and P nutrients, CO₂-rich 5CBS (i.e., CR-5CBS) was adopted as the root or foliar fertilizer to cultivate Spathiphyllum. Additionally, the commercial Spathiphyllum fertilizer was also experimented as a control. Results showed that the cases adopting CR-5CBS as the root or foliar fertilizer can obtain the agronomic traits and ornamental values of Spathiphyllum better those irrigated by the commercial fertilizer. Exogenetic nutrients added into CR-5CBS can lead to a decreased dead leaf number of Spathiphyllum, an enhanced N assimilation performance, however only a slightly improved assimilation performance of Ca, Mg and P. In terms of the fertilizer economy, CR-5CBS without exogenetic nutrient addition may be a promising for replacing the commercial Spathiphyllum fertilizer in the future. Economic and environmental pollution potential (EPP) analyses indicated that treating biogas slurry as the organic flower fertilizer can achieve a high net profit with about $ 28.89/m³-biogas slurry and a negative EPP value (−3.9), showing its profitability and environmental friendliness.

通过将沼液转化为西番莲的有机肥，提出了一种沼液处理的新方法。首先通过真空蒸馏浓缩沼气以将其体积减少80％（称为5CBS），然后将CO ₂饱和以将其pH降低至约6.50±0.20。添加或不添加外源钙，镁和磷养分，CO ₂富含5CBS（即CR-5CBS）被用作根系或叶面肥料来种植绿巨人。另外，还试验了商品的西番莲肥料作为对照。结果表明，以CR-5CBS为根或叶面肥料的情况下，能更好地获得以商品化肥料灌溉的西番莲的农艺性状和观赏价值。添加到CR-5CBS中的外源养分可以减少西番莲的死叶数量，增强N的同化性能，但是对Ca，Mg和P的同化性能仅略有改善。就肥料经济性而言，CR-5CBS没有外源性添加营养可能会在将来取代商业化的Spathiphyllum肥料。^3-沼气浆液，EPP值为负（−3.9），显示出其盈利能力和环境友好性。