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http://dx.doi.org/10.5322/JESI.2021.30.2.135

Effect of Flocculant Injection Ratio in NIR (Near-Infrared Ray) Drying for BIO-SRF (Solid Recovered Fuel) of Swage Sludge  

Lee, Kang-min (Busan Environmental Corporation)
Lee, Seung-Won (Department of Environmental Engineering, Dong-Eui University)
Publication Information
Journal of Environmental Science International / v.30, no.2, 2021 , pp. 135-143 More about this Journal
Abstract
This study executed evaluation of drying characteristics based on the polymer injection rate (8%, 10% and 12%) and the drying method[NIF(near-infrared ray). According to this study analyzed VS, VS/TS, and calorific value compared with 'the auxiliary fuel standard of the thermoelectric power plant and the combined heat & power plant'. The results are as follows. In the case of NIR, the VS was slightly changed at the early stage of the material preheating period and the constant drying rate period with low moisture evaporation. But VS reduction was shown higher as moisture was dried. In the case of non-digested sludge with high VS content, the VS reduction rate by drying was shown lower than that of digested sludge. As the flocculant injection rate increased, the VS loss due th drying was found to be small. Also, the higher the flocculant injection rate was the longer the drying time. Especially, in the case of the NIR drying equipment, as the moisture content of sewage sludge decreased(moisture content 20~40%), the loss of net VS also showed a tendency to increase sharply. It is shown that the high calorific value according to the drying time of the non-digested sludge was changed from 590 kcaℓ/kg to 3,005 kcaℓ/kg and from 539 kcaℓ/kg to 2,796 kcaℓ/kg.
Keywords
SRF (Solid Refuse Fuel); Sewage sludge; Flocculant injection rate; VS/TS; NIR (Near-Infrared Ray);
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  • Reference
1 Busan metropolitan city, 2019, Environmental white paper.
2 Kim, S. Y., 2009, A Study on the drying and volume reduction for sewage sludge using near infrared ray, Master Thesis, Dong-eui University, Korea.
3 Lee, Y. H., 2016, A Study on the possibility of solid fuel by torrefaction methods using sewage sludge, Master thesis, Seoul National University of Sicence and Technology, Korea.
4 Ministry of environment, 2020, 2017 Sewer statistics.
5 Park, S. H., 2016, Effects on the drying efficiency of sewage sludge in viscosity according to polymer coaqulant dose ratio, Doctor Thesis, Dong-eui University, Korea.
6 Ryu, S, H., 2010, A Study on fuelization of organic waste sludge using pyrolysis, Master thesis, Kyungpook National University, Korea.
7 Seoul green environment center, 2008, Polymer for improving the dehydration of sludge at the sewage treatment plant in seoul.
8 An, Y. C., 2008, Utilization of sewage sludge as a fuel and its application of CDM, Master thesis, In Cheon National University, Korea.
9 Baek, S. J., 2015, Study on the mechanism of the optimal reaction in the pretreatment process for recycling of sewage sludge, Doctor Thesis, Seoul Supervised University, Korea.