Physicochemical properties and biogas productivity of aerobic granular sludge and activated sludge

Abstract There is a great interest in implementation of aerobic granular sludge (GS) technology in full-scale facilities; however, there is little data on the potential of waste GS for biogas production. Therefore, biogas potential tests (GP21) were performed in mesophilic conditions at different organic loading rates (OLRs) with GS, excess activated sludge (AS), and their mixtures with primary sludge (PS:GS and PS:AS) as substrates. The study has shown that chemical composition of GS, especially the content of lignocellulosic substances (hard-to-biodegrade lignin comprised ca. 54% of fibrous materials), determined the biogas potential that was 1.8 time lower than that of AS. GS produced about 320–410 dm3/kg TS, (depending on OLR) with the methane content of about 56.7–59.5%. Rate constants of the biogas production were typical for substrates with high fibre and lignin content (0.05–0.08 d−1). It has been shown that the improvement of biogas potential and biogas composition in terms of methane content could have been obtained by co-digestion of GS and AS with PS. Co-fermentation of PS:AS and PS:GS mixtures generated biogas with higher methane content and at a higher rate constant than AS or GS alone. The results should be valuable for both scientists and operators of commercial biogas facilities.

[1]  Jun Zhu,et al.  Biogas and CH(4) productivity by co-digesting swine manure with three crop residues as an external carbon source. , 2010, Bioresource technology.

[2]  Chang Chen,et al.  Evaluating Methane Production from Anaerobic Mono- and Co-digestion of Kitchen Waste, Corn Stover, and Chicken Manure , 2013 .

[3]  Joo-Hwa Tay,et al.  State of the art of biogranulation technology for wastewater treatment. , 2004, Biotechnology advances.

[4]  Hélène Carrère,et al.  Impacts of thermal pre-treatments on the semi-continuous anaerobic digestion of waste activated sludge , 2007 .

[5]  C Gruvberger,et al.  Co-digestion of grease trap sludge and sewage sludge. , 2008, Waste management.

[6]  W. Owen,et al.  Fundamentals of Anaerobic Digestion of Wastewater Sludges , 1986 .

[7]  A Bonmatí,et al.  Biomass adaptation over anaerobic co-digestion of sewage sludge and trapped grease waste. , 2011, Bioresource technology.

[8]  J P Steyer,et al.  Thermal pre-treatment of aerobic granular sludge: impact on anaerobic biodegradability. , 2011, Water research.

[9]  Cristina González-Fernández,et al.  Algaculture integration in conventional wastewater treatment plants: anaerobic digestion comparison of primary and secondary sludge with microalgae biomass. , 2015, Bioresource technology.

[10]  Sven G Sommer,et al.  A new algorithm to characterize biodegradability of biomass during anaerobic digestion: influence of lignin concentration on methane production potential. , 2011, Bioresource technology.

[11]  J Baeyens,et al.  The distribution of heavy metals during fluidized bed combustion of sludge (FBSC). , 2008, Journal of hazardous materials.

[12]  H. D. Stensel,et al.  Wastewater Engineering: Treatment and Reuse , 2002 .

[13]  Pawinee Chaiprasert,et al.  Production of methane by co-digestion of cassava pulp with various concentrations of pig manure , 2010 .

[14]  Hariklia N Gavala,et al.  Mesophilic and thermophilic anaerobic digestion of primary and secondary sludge. Effect of pre-treatment at elevated temperature. , 2003, Water research.

[15]  R. Méndez,et al.  Anaerobic digestion of aerobic granular biomass: effects of thermal pre‐treatment and addition of primary sludge , 2014 .

[16]  H. Horn,et al.  Aerobic Sludge Granulation in a Full-Scale Sequencing Batch Reactor , 2014, BioMed research international.

[17]  V. Gunaseelan.  Biochemical methane potential of fruits and vegetable solid waste feedstocks , 2004 .

[18]  J L García-Heras,et al.  Anaerobic digestion of seven different sewage sludges: a biodegradability and modelling study. , 2013, Water research.

[19]  Feng Wang,et al.  Comparative evaluation of anaerobic digestion for sewage sludge and various organic wastes with simple modeling. , 2015, Waste management.

[20]  Alexandros Kelessidis,et al.  Comparative study of the methods used for treatment and final disposal of sewage sludge in European countries. , 2012, Waste management.

[21]  Osman Nuri Ağdağ,et al.  Co-digestion of industrial sludge with municipal solid wastes in anaerobic simulated landfilling reactors , 2005 .

[22]  Jian Shi,et al.  Comparison of solid-state to liquid anaerobic digestion of lignocellulosic feedstocks for biogas production. , 2012, Bioresource technology.

[23]  A. E. Greenberg,et al.  Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .

[24]  M C M van Loosdrecht,et al.  Full scale performance of the aerobic granular sludge process for sewage treatment. , 2015, Water research.

[25]  P. Champagne,et al.  Enzymatic hydrolysis of cellulosic municipal wastewater treatment process residuals as feedstocks for the recovery of simple sugars. , 2009, Bioresource technology.

[26]  T. Tan,et al.  The anaerobic co-digestion of food waste and cattle manure. , 2013, Bioresource technology.

[27]  I. Angelidaki,et al.  Assessment of the anaerobic biodegradability of macropollutants , 2004 .

[28]  M. Zielińska,et al.  Cycle length and COD/N ratio determine properties of aerobic granules treating high-nitrogen wastewater , 2013, Bioprocess and Biosystems Engineering.

[29]  N. Bernet,et al.  Aerobic granular sludge—a case report , 1999 .

[30]  Chang Chen,et al.  Comparison of methane production potential, biodegradability, and kinetics of different organic substrates. , 2013, Bioresource technology.

[31]  Angélique Léonard.  Management of Wastewater Sludge's: A Hot Topic at the European Level , 2011 .