Solving pollution problems can cause new problems
1979
Zall, Robert R.
Technology has devised ways to convert agricultural and food processing waste products into usable products. While this keeps increasing waste disposal costs down, foreign substances may enter the food chain. Demineralization beds are filled with synthetic resins that can contaminate food products. Users of carbon filtering aids must carefully check for the presence of carbon in foods. Sludge, a collection of waste solids from sewage-treatment plants, has been used as fertilizer or animal feed supplement; the pollutant effects of the sludge often outweigh its benefits. Drift from waste-treatment plants may affect nearby food-processing plants. The recycling of cooling waters has pollution potential, especially when toxic chemicals have been added to the water. New approaches to the food-recovery problem being tried include ultrafiltration, reverse osmosis, addition of enzymes, and the use of microbial enzymes to degrade toxic materials.
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