PMID: 15242123Jul 10, 2004Paper

Effects of mixture ratio and hydraulic retention time on single-stage anaerobic co-digestion of food waste and waste activated sludge

Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Nam Hyo HeoHo Kang

Abstract

The biochemical methane potential (BMP) test was used to evaluate the anaerobic biodegradabilities of food waste (FW), waste activated sludge (WAS), and the mixtures having the ratios of 10:90, 30:70, 50:50, 70:30, and 90:10 (FW:WAS) on a volatile solid (VS) basis. The carbon/nitrogen (C/N) ratio and the biodegradability of the mixtures improved from 6.16 to 14.14 and increased from 36.6 to 82.6% as the FW proportion of the mixture increased from 10 to 90%, respectively. The stability and performance of the single-stage anaerobic digester (SSAD) for the co-digestion of FW and WAS were investigated, operated at the hydraulic retention times (HRTs) of 10, 13, 16, and 20 days with five mixtures at 35 degrees C, respectively. During all the experiments, there were no indication of failure such as low pH, insufficient alkalinity, ammonia inhibition, and the accumulation of volatile fatty acids (VFAs) in any of the digesters, and the buffer capacity was the highest in the digester fed with a feed mixture of 50:50. The optimum operating conditions of the SSAD were found to be an HRT of 13 days and a mixture of 50:50 in terms of the buffer capacity of the digester and the effluent VS concentration, the methane content of the biogas pro...Continue Reading

References

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Citations

Sep 4, 2012·Journal of Environmental Management·Eleni IacovidouNikolaos Voulvoulis
Aug 5, 2015·Bioresource Technology·Seung Gu ShinSeokhwan Hwang
Sep 4, 2010·Bioresource Technology·Jingxing MaMarta Carballa
Mar 31, 2015·Bioresource Technology·Muhammad Rizwan HaiderChettiyappan Visvanathan
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Jul 24, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Wanli ZhangAimin Li
Dec 19, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·M D SeibD R Noguera
Dec 23, 2019·Environmental Science and Pollution Research International·Mozhiarasi VelusamySrinivasan Shanmugham Venkatachalam
Oct 22, 2019·New Biotechnology·Barbara TonanziAndrea Gianico
Oct 3, 2017·Bioresource Technology·Fuqing XuYebo Li

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