{"title":"Aerobic treatment of maize-processing wastewater in a 50-liter rotating biological reactor","authors":"R. Pedroza-Islas, C. Durán de Bazúa","doi":"10.1016/0269-7483(90)90069-5","DOIUrl":null,"url":null,"abstract":"<div><p>Corn (maize)—processing effluents, known as <em>nejayote</em>, were aerobically treated in a 50-liter laboratory-scale rotating biological reactor. Removal of organic compounds, evaluated as chemical and biochemical oxygen demand (COD and BOD), as well as reducing sugars, was monitored. Operating conditions were: feed COD, 6·4 g/liter; rotational disc speed, 16 rpm; hydraulic retention time, 2·5 days. A comparison with previous experiments, carried out in a 150liter reactor, to consider scaling-up effects (1:3) was performed. Final COD removal was 84·6%. The application of an exponential model to reducing-sugars degradation was highly satisfactory, and the value of the constant was −0·352. Generated biomass was bromatologically evaluated, and average results in per cent of total dry biomass were: protein content, 41·5; fat, 3·4; fiber, 14·8; ash, 15·1.</p></div>","PeriodicalId":100177,"journal":{"name":"Biological Wastes","volume":"32 1","pages":"Pages 17-27"},"PeriodicalIF":0.0000,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0269-7483(90)90069-5","citationCount":"13","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biological Wastes","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0269748390900695","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 13
Abstract
Corn (maize)—processing effluents, known as nejayote, were aerobically treated in a 50-liter laboratory-scale rotating biological reactor. Removal of organic compounds, evaluated as chemical and biochemical oxygen demand (COD and BOD), as well as reducing sugars, was monitored. Operating conditions were: feed COD, 6·4 g/liter; rotational disc speed, 16 rpm; hydraulic retention time, 2·5 days. A comparison with previous experiments, carried out in a 150liter reactor, to consider scaling-up effects (1:3) was performed. Final COD removal was 84·6%. The application of an exponential model to reducing-sugars degradation was highly satisfactory, and the value of the constant was −0·352. Generated biomass was bromatologically evaluated, and average results in per cent of total dry biomass were: protein content, 41·5; fat, 3·4; fiber, 14·8; ash, 15·1.
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