求翻译：在某些船舶上，真空系统每次的用水量仅仅为0.1L～0.5L[1]。真空排污系统收集起来的高浓度粪便还可以加工成高效有机复合肥，产生较高的经济效益。真空排污系统的诸多优点说明，在我国今后的城市发展建设中，经济技术上合理的真空排污系统必将成为传统重力排污系统的有益补充是什么意思？

In some ships, vacuum system each time the water just as 0.1L~0.5L[1]. Vacuum sewage systems collect feces can also be processed into high concentration of high efficiency organic fertilizer, resulting in higher economic benefits. Benefits of vacuum sewerage system description, in the construction of future urban development in China, reasonable economic technology for vacuum sewage system will become useful complement to conventional gravity sewer systems