III. ENVIRONMENT MONITORING AND URBAN PLANNING
A. Environmental quality in Shanghai
4. Harnessing or control of the three wastes
(a) Waste water
The industrial waste water volume in Shanghai reduced by 23 per cent from 4.11 million tons per day in 1985 to 3.18 million tons per day in 1995, while the treatment rate of industrial waste water increased from 25.3 per cent to 86.4 per cent (figure 31). The volume of domestic sewage has also experienced a sharp increase. For example, its charging volume in 1995 reached 2.97 million tons per day with a 26.8 per cent increase against 1994. However, the treatment rate was only 41.07 per cent although it is expected to reach 65 per cent by the year 2000.
Figure 31. Industrial waste water in Shanghai (10,000t/day)
Figure 32. Household refuse in Shanghai (10,000t/year)
(b) Solid wastes
The disposal rate of household refuse in Shanghai has increased rapidly and is expected to reach 100 per cent ahead of schedule (figure 32). The volume of industrial solid waste was 13.68 million tons in 1995, which was an increase of 9.9 per cent over 1994. The re-utilization rate was 82.9 per cent.