Abstract
Dewaterability of anaerobic digestate influences the further disposal ways. The role of mixing ratio on anaerobic co-digestion of food waste (F) and sludge (S) was investigated under mesophilic condition. Five different mixing ratios (F; F/S = 3:1; F/S = 1:1; F/S = 1:3; S) were evaluated with two replicates. The specific biogas production (SBP) of five mixing ratios were 95.5, 105.6, 95.6, 435.5 and 344.0 mL g−1-VSadded respectively. Under S condition, normalized capillary suction time (NCST) was significant correlation with protein and polysaccharide of Slime. Under F condition, NCST was significant correlated with polysaccharide of Slime. Under other conditions, the NCST was no significant correlation with protein and polysaccharide of any layers of extracellular polymeric substances (EPS). NCST increased with the increasing of sludge ratio. On day 37, NCST were 3.4 ± 0.9, 72.1 ± 15.6, 164.2 ± 37.6, 179.2 ± 30.6 and 278.1 ± 56.1 s g−1-TS respectively. Adequate mixing ratio (around F/S = 1:3) of food waste and sludge under mesophilic anaerobic condition could result in high SBP. The dewaterability of anaerobic digestate deteriorated with the increasing of sludge ratio in mixture of sludge and food waste.
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References
Cai, J., He, P., Wang, Y., Shao, L., Lu, F.: Effects and optimization of the use of biochar in anaerobic digestion of food wastes. Waste Manage. Res. 34, 409–416 (2016)
Prabhu, M.S., Mutnuri, S.: Anaerobic co-digestion of sewage sludge and food waste. Waste Manage. Res. 34, 307–315 (2016)
Liang, Y., Lu, Y., Li, Q.: Comparative study on the performances and bacterial diversity from anaerobic digestion and aerobic composting in treating solid organic wastes. Waste Biomass Valor. 8, 425–432 (2017)
Shao, L., Xu, Y., Wang, T., Lü, F., He, P.: Effect of fillers on key characteristics of sludge thermophilic anaerobic digestion. Bioresource Technol. 193, 415–423 (2015)
Dong, J., Chi, Y., Tang, Y., Wang, F., Huang, Q.: Combined life cycle environmental and exergetic assessment of four typical sewage sludge treatment techniques in China. Energ Fuel. 28, 2114–2122 (2014)
Li, L., He, Q., Ma, Y., Wang, X., Peng, X.: Dynamics of microbial community in a mesophilic anaerobic digester treating food waste: Relationship between community structure and process stability. Bioresource Technol. 189, 113–120 (2015)
Appels, L., Baeyens, J., Degre, J., Dewil, R.: Principles and potential of the anaerobic digestion of waste-activated sludge. Prog. Energy Combust. Sci. 34, 755–781 (2008)
Dai, X., Duan, N., Dong, B., Dai, L.: High-solids anaerobic co-digestion of sewage sludge and food waste in comparison with mono digestions: Stability and performance. Waste Manage. 33, 308–316 (2013)
Liu, X., Li, R., Ji, M., Han, L.: Hydrogen and methane production by co-digestion of waste activated sludge and food waste in the two-stage fermentation process: Substrate conversion and energy yield. Bioresour. Technol. 146, 317–323 (2013)
Naran, E., Toor, U.A., Kim, D.: Effect of pretreatment and anaerobic co-digestion of food waste and waste activated sludge on stabilization and methane production. Int. Biodeterior. Biodegrad. 113, 17–21 (2016)
Gou, C., Yang, Z., Huang, J., Wang, H., Xu, H., Wang, L.: Effects of temperature and organic loading rate on the performance and microbial community of anaerobic co-digestion of waste activated sludge and food waste. Chemosphere 105, 146–151 (2014)
Zhang, J., Lü, F., Shao, L., He, P.: The use of biochar-amended composting to improve the humification and degradation of sewage sludge. Bioresour. Technol. 168, 252–258 (2014)
Wang, T., Chen, J., Shen, H., An, D.: Effects of total solids content on waste activated sludge thermophilic anaerobic digestion and its sludge dewaterability. Bioresour. Technol. 217, 265–270 (2016)
APHA: Standard Methods for the Examination of Water and Wastewater, 18th edn. American Public Health Association, Washington DC (1998)
Gaudy, A.F.: Colorimetric determination of protein and carbohydrate. Ind. Water Wastes 17, 17–22 (1962)
Markwell, M.A.K., Haas, S.M., Bieber, L.L., Tolbert, N.E.: A modification of the Lowry procedure to simplify protein determination in membrane and lipoprotein samples. Anal Biochem. 87, 206–210 (1978)
Xue, Y., Liu, H., Chen, S., Dichtl, N., Dai, X., Li, N.: Effects of thermal hydrolysis on organic matter solubilization and anaerobic digestion of high solid sludge. Chem. Eng. J. 264, 174–180 (2015)
Wang, T., Shao, L., Li, T., Lü, F., He, P.: Digestion and dewatering characteristics of waste activated sludge treated by an anaerobic biofilm system. Bioresour. Technol. 153, 131–136 (2014)
Sung, S., Liu, T.: Ammonia inhibition on thermophilic anaerobic digestion. Chemosphere 53, 43–52 (2003)
Shao, L., Wang, T., Li, T., Lü, F., He, P.: Comparison of sludge digestion under aerobic and anaerobic conditions with a focus on the degradation of proteins at mesophilic temperature. Bioresour. Technol. 140, 131–137 (2013)
Izumi, K., Okishio, Y., Nagao, N., Niwa, C., Yamamoto, S., Toda, T.: Effects of particle size on anaerobic digestion of food waste. Int. Biodeterior. Biodegrad. 64, 601–608 (2010)
Lo, H.M., Kurniawan, T.A., Sillanp, M.E.T., Pai, T.Y., Chiang, C.F., Chao, K.P., Liu, M.H., Chuang, S.H., Banks, C.J., Wang, S.C., Lin, K.C., Lin, C.Y., Liu, W.F., Cheng, P.H., Chen, C.K., Chiu, H.Y., Wu, H.Y.: Modeling biogas production from organic fraction of MSW co-digested with MSWI ashes in anaerobic bioreactors. Bioresour. Technol. 101, 6329–6335 (2010)
Sosnowski, P., Wieczorek, A., Ledakowicz, S.: Anaerobic co-digestion of sewage sludge and organic fraction of municipal solid wastes. Adv. Environ. Res. 7, 609–616 (2003)
Liu, Y., Fang, H.H.P.: Influences of extracellular polymeric substances (EPS) on flocculation, settling, and dewatering of activated sludge. Crit. Rev. Environ. Sci. Technol. 33, 237–273 (2003)
Sheng, G., Yu, H., Li, X.: Extracellular polymeric substances (EPS) of microbial aggregates in biological wastewater treatment systems: A review. Biotechnol. Adv. 28, 882–894 (2010)
Lü, F., Zhou, Q., Wu, D., Wang, T., Shao, L., He, P.: Dewaterability of anaerobic digestate from food waste: Relationship with extracellular polymeric substances. Chem. Eng. J. 262, 932–938 (2015)
Feng, X., Deng, J., Lei, H., Bai, T., Fan, Q., Lia, Z.: Dewaterability of waste activated sludge with ultrasound conditioning. Bioresour. Technol. 100, 1074–1081 (2009)
Shao, L., Wang, X., Xu, H., He, P.: Enhanced anaerobic digestion and sludge dewaterability by alkaline pretreatment and its mechanism. J. Environ. Sci. China. 24, 1731–1738 (2012)
Ye, F., Liu, X., Li, Y.: Extracellular polymeric substances and dewaterability of waste activated sludge during anaerobic digestion. Water Sci. Technol. 70, 1555–1560 (2014)
Neyens, E., Baeyens, J., Dewil, R., De Heyder, B.: Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering. J. Hazard Mater. 106, 83–92 (2004)
Vavilina, V.A., Fernandezb, B., Palatsib, J., Flotats, X.: Hydrolysis kinetics in anaerobic degradation of particulate organic material: An overview. Waste Manage. 28, 939–951 (2008)
Acknowledgements
This work was supported by the National Natural Science Foundation of China (21567011), State Key Laboratory of Pollution Control and Resource Reuse Foundation (PCRRF16025), Science and Technology Foundation of Education Department of Jiangxi Province (GJJ161085) and Natural Science Foundation of Jiangxi Province (20151BAB213018 and 20151BAB203026).
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Wang, T., Yang, P., Zhang, X. et al. Effects of Mixing Ratio on Dewaterability of Digestate of Mesophilic Anaerobic Co-Digestion of Food Waste and Sludge. Waste Biomass Valor 9, 87–93 (2018). https://doi.org/10.1007/s12649-017-9949-2
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DOI: https://doi.org/10.1007/s12649-017-9949-2