wastewater with BOD loading of 135 kg. It implies that the plants’
measures for reuse and recycling of water are insufficient and ineffective.
Table 2 shows a relatively high variation of water consumption
among the selected plants. Since starch-processing
plants usually use surface water, which is free of charge, and the
cost of water treatment is as low as 2.50 baht/m3, some starchprocessing
companies have not been overly concerned with water
conservation. Moreover, the tapioca starch industry produces large
quantities of solid wastes such as fibrous residue, root peel and
sand. Basically, 1 ton of fresh root yields 0.24, 0.33, and 0.09 ton of
wastewater with BOD loading of 135 kg. It implies that the plants’measures for reuse and recycling of water are insufficient and ineffective.Table 2 shows a relatively high variation of water consumptionamong the selected plants. Since starch-processingplants usually use surface water, which is free of charge, and thecost of water treatment is as low as 2.50 baht/m3, some starchprocessingcompanies have not been overly concerned with waterconservation. Moreover, the tapioca starch industry produces largequantities of solid wastes such as fibrous residue, root peel andsand. Basically, 1 ton of fresh root yields 0.24, 0.33, and 0.09 ton of
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