4. Development of Greening Technologies 　　　based on Water Recycling System
(1) Producing tree seedlings with Root Cylinder System (RCS)
The characteristics of this technology are as follows: a) Shortening of duration of raising seedling (Fig. 10) b) Improvement of establishment rate and water saving c) Avoidance of damage by salt accumulation

	Fig. 10 Effects of soil hardness on root elongation

(2) Producing irrigation water and cooling air from waste water by
　　Freeze Concentration Method (FCM)

The characteristics of this technology are as follows:
a) Reuse of sewage or industrial waste water
b) Low cost of waste water treatment through
combination with cold energy supply system

Table 2 Material balance (in a case)

Reusable Water Yield(%)	80
CCD(ppm)	300⇒10
EC(mS/cm)	1.5⇒＜0.1
SS(ppm)	120⇒＜5

Fig.11 Description for reuse of waste water using FCM