Utilization of sewage from some industrial factories for composting
1993
Chawiwan Luangwutthiwirot | Phitthayakon Limthong | Siangjeaw Piriyaprin (Department of Land Developmet, Bangkok (Thailand). Soil and Water Conservation Div. Organic Matter and Waste Products Sub-Div.)
There were 12 treatments in 2 replications which consist of sewage from sugarcane, distillery, cassava flour and food can industries with organic wastes as bagasse, cassava residue, cassava peel sweet corn cob and sweet corn peel including application and no addition of animal manure. It was indicated that amount of cellulolytic bacteria, actinomycetes and fungi as 10.92-11.27, 8.75-9.43 and 6.22- 6.87 log no./g from utilized sewage of food can with sweet corn residue for composting had higher than other treatments. Cellulase and polyphenol oxidase activity had value about 0.44-0.54 and 46.82-51.10 U/g which had effect to carbon content and C/N ratio value were decreased from 36.92-43.53 percent and 32-41 to 23.27-25.23 and 14.16 percent respectively in the final of decomposition process at 60 days. The pH level of this material was neutral value. The nutrient content was increased in residue of each treatment; nitrogen, phosphorus and potassium content were increased from 0.51-1.18, 0.11-0.40 and 0.62-10 percent to 0.85-1.68, 0.38-0.89 and 0.79-2.11 percent respectively.
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