[Water pollution control in the South Cimahi industrial region (Indonesia)]
1996
Terangna, N. | Yusuf, A. (Balai Lingkungan Keairan, Bandung (Indonesia))
In the South Cimahi industrial region with an area of approx 300 ha, are registed approx 200 industries, primarily textile industry. At this moment 153 potential industries discharge their wastewater with the estimated load of 25,76 ton BOD/day. The wastewater is discharged into Citarum tributaries : Ciujung, Cibodas, Cigugur and Cimahi. The carrying capacity of the Citarum river at the South Cimahi point discharge, is only about 9,83 ton BOD/day, that is much less than the total waste load from the Cimahi industrial area, which is around 25,14 ton BOD/day. The BOD content of the Citarum river at downstream of the industrial region arises 50 percent, that is from 20,5 mg/l to 30,5 mg/l, and the content of the dissolved oxygen has become zero. Total BOD load of the river at downstream point is 76,9 ton BOD/day or increase 62 percent compare to upstream industrial waste inlets. Some alternatives have been proposed to control the pollution of this area, but a Centralised Wastewater Collection and Treatment System (CWCTS) with Acterated Sludge Biological process, found as a best solution for that. The CWCTS covers the constructing of a approx 12 km of pipeline for wastewater collection and installation for wastewater treatment a capacity of 488 l/sec. for the year 2005. The investment cost for the installation, including tax, is estimated around Rp.42 billion, and the cost of operation and maintenance is about Rp.5,5 billion annually. Consider with governmental policy to promote private sector participation for the development of public facilities, it is recommended that CWCTS construction and management should be given to private sector. With the South Cimahi CWCTS it is expected that the quality of the Citarum river can be improved and a minimum objective of dissolved oxygen of 3 mg/l in the river can be achieved
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