克雷默计算了一下，如果海地将人类排泄物中的50%养分回收利用到农田，那么每公顷氮的投入将跃升到17千克。
Kramer calculates that if Haiti recycled 50 percent of the nutrients in human waste onto farmland, input would leap to 17 kilograms per hectare.
目的：利用废水回收磷、氮，生产化肥。
Task: Recover phosphorus and nitrogen from wastewater to make fertilizer.
叙述了介绍了气体膜分离技术在分离空气制备富氧、富氮，水蒸气、有机蒸汽的分离和氢气回收等工业领域的应用。
Various applications of gas separation membrane were reviewed in details, such as medical rich oxygen, air separation, water vapor separation, hydrogen recovery in refinery gas and so on.
应用推荐