Anaerobic digestion of heat treated sludge liquor by pilot scale mesophilic EGSB reactor

Zhao Jing, Qiao Wei, Wang Wei, Gao Fang, Xiao Zheng

Abstract


Biogas recovery from heat treated sludge liquor was tested by a 4 m3 mesophilic expanded granular sludge bed (EGSB) reactor within 206 days. Before pilot experiment, the heat pretreatment effects on hydrolysis and biogas production potential on three sludges from different wastewater plants were evaluated using bench test. One of these sludges was used in the subsequent pilot heat treatment and EGSB reactor. The biogas conversion potential of this sludge filtrate was 79%. Seeded with granular sludge, the EGSB reactor could be quickly activated and adapted to the new filtrate substrate. The EGSB influent COD was 20.0-35.0 g/L, and the effluent COD was lower than 10.0 g/L. The COD removal rate was 60%-70% at an organic loading rate (OLR) of 10.0 kg COD/(m3•d). The fresh supernatant with low pH resulted in the high biogas production in EGSB. The effluent with high nitrogen and phosphor should be considered for further treatment.
Keywords: anaerobic digestion, sludge, biogas, heat treatment, EGSB reactor, pilot scale
DOI: 10.3965/j.ijabe.20160903.2371

Citation: Zhao J, Qiao W, Wang W, Gao F, Xiao Z. Anaerobic digestion of heat treated sludge liquor by pilot scale mesophilic EGSB reactor. Int J Agric & Biol Eng, 2016; 9(3): 146－153.

Keywords


anaerobic digestion, sludge, biogas, heat treatment, EGSB reactor, pilot scale

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References


Ministry of housing and urban-rural development (Mhud). China urban construction statistical yearbook. China planning press, Beijing, 2010. (in Chinese)

Holm-Nielsen J B, Seadi T A, Oleskowicz-Popiel P. The future of anaerobic digestion and biogas utilization. Bioresour Technol, 2009; 100: 5478−5484.

Skiadas I V, Gavala H N, Lu J, Ahring B K. Thermal pre-treatment of primary and secondary sludge at 70°C prior to anaerobic digestion. Water Sci. Technol, 2005; 52(1-2): 161−166.

Appels L, Dewil R, Baeyens J, Degrève J. Ultrasonically enhanced anaerobic digestion of waste activated sludge. Int J Sustainable Energy, 2008; 1(2): 94−104.

Müller J A. Prospects and problems of sludge pre-treatment processes. Water Sci Technol, 2001; 44(10): 121−128.

Brooks R B. Heat treatment of activated sludge. Water Pollution Control, 1968; 67: 592−601.

Pickworth B, Adams J, Panter K. Maximising biogas in anaerobic digestion by using engine waste heat for thermal hydrolysis pre-treatment of sludge. Water Sci Technol, 2006; 54(5): 101−108.

Chauzy J, Graja S, Gerardin F. Minimisation of excess sludge production in a WWTP by coupling thermal hydrolysis and rapid anaerobic digestion. Water Sci Technol, 2005; 52(10-11): 255−263.

Cambi Company. http://www.cambi.com. Accessed on [2016-01-20]

Xia Z, Wang W, Wang Z J. Study on pilot experiment of lowpressure oxidation (LPO) of municipal sewage sludge. Journal of Harbin University of Commerce, 2005; 21(2): 153−156. (in Chinese with English abstract)

Neyens E, Baeyens J, Weemaes M. Hot acid hydrolysis as a potential treatment of thickened sewage sludge. J Hazard Mater, 2003; 98: 275−293.

Eskicioglu C, Kennedy K J, Droste R L. Characterization of soluble organic matter of waste activated sludge before and after thermal pretreatment. Wat Res, 2006; 40: 3725−3736.

Yoneyama Y, Nishii A, Nishimoto M, Yamada N, Suzuki T. Upflow anaerobic sludge blanket (UASB) treatment of supernatant of cow manure by thermal pre-treatment. Water Sci Technol, 2006; 54(9): 221−227.

Kaparaju P, Ellegaard L, Angelidaki I. Optimisation of biogas production from manure through serial digestion: Lab-scale and pilot-scale studies. Bioresour Technol, 2009; 100: 701−709.

Qiao W, Peng C, and Wang W. Biogas production from supernatant of hydrothermally treated municipal sludge by upflow anaerobic sludge blanket reactor. Bioresour Technol, 2011; 102: 9904−9911.

Seghezzo L, Zeeman G, van Lier J B, Hamelers H V M, Lettinga G. A review: the anaerobic treatment of sewage in UASB and EGSB reactors. Bioresour Technol, 1998; 65: 175−190.

Fang C, Boe K, Angelidaki I. Biogas production from potato-juice, a by-product from potato-starch processing, in upflow anaerobic sludge blanket (UASB) and expanded granular sludge bed (EGSB) reactors. Bioresour Technol, 2011; 102: 5734−5741.

Liu J, Zhong J P, Wang Y L. Effective bio-treatment of fresh leachate from pretreated municipal solid waste in an expanded granular sludge bed bioreactor. Bioresour Technol, 2010; 101: 1447−1452.

Li Y Y, Noikeal T. Upgrading of anaerobic digestion of waste activated sludge by thermal pretreatment. Water Sci Technol, 1992; 26(3-4): 857−866.

State EPA. Water and waste water monitoring and analysis methods (Fourth edition). China Environmental Science Press, Beijing, 2005; 243−246.

Heo N H, Park S C, Lee J S . Solubilization of waste activated sludge by alkaline pretreatment and biochemical methane potential (BMP) tests for anaerobic co-digestion of municipal organic waste. Water Sci Technol, 2003; 48(8): 211−219.

Ma J W, Cao R. Effect of solid content on thermal hydrolysis characteritics and flowability of high solid content sewage sludge. Environmental Science, 2010; 31(7): 172−178.

Everett J G. Dewatering of wastewater sludge by heat treatment. Journal WPCF, 1972; 44(1): 92−100.

Climent M, Ferrer I, del Mar Baeza M, Artola A, Vázquez F, Font X. Effects of thermal and mechanical pretreatments of secondary sludge on biogas production under thermophilic conditions. Chem Eng J, 2007; 133: 335−342.

Liu T, Sung S. Ammonia inhibition on thermophilic aceticlastic methanogens. Water Sci Technol, 2002; 45: 113−120.

Sung S, Liu T. Ammonia inhibition on thermophilic anaerobic digestion. Chemosphere, 2003; 53: 43−52.

Grotenhuis J T C, Smit M, Plugge C M. (1991) Bacteriological composition and structure of granular sludge adapted to different substrates. Appl Environ Microb, 1991; 57(7): 1942−1949.

Fang H H P, Chui H K, Li Y Y. Microbial structure and activity of UASB granules treating different wastewaters. Water Sci Technol, 1994; 30(12):87−96.

Molina F, García C, Roca E. Characterization of anaerobic granular sludge developed in UASB reactors that treat ethanol, carbohydrates and hydrolyzed protein based wastewaters. Water Sci Technol, 2008; 57(6): 837−842.




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