The toilet, a squat type, has two drains, one in the front for urine and another in the back for feces. The urine collected by the front drain is diluted, then used to irrigate fields. The rear drain drops feces onto plant ash and loose earth. After drying for a period of time, it makes an excellent fertilizer.
也就是將蹲式廁所設計成「前尿後糞分離」的兩個出口，前方坑洞蒐集的尿液經稀釋後，立刻可以拿來灌溉菜園；而後面的糞坑只要撒上草木灰、泥土，靜待一段時間乾燥後，就變成極好的堆肥。