Anaerobic treatment of activated sludge from Swedish pulp and paper mills – biogas production potential and limitations

The methane potential of activated sludge from six Swedish pulp and paper mills was evaluated. The methane production potential of sludge samples ranged from 100–200 NmL CH4 g−1 volatile solids (VS) and for four of the six sludge samples the potential exceeded 170 NmL CH4 g−1 VS. The effects of sludge age and dewatering on the methane production potential were evaluated. The effects of enzymatic and ultrasonic pre‐treatment on the digestibility of sludge were also investigated, but energy or enzyme inputs in viable ranges did not exert a detectable, positive effect. Long‐term, semi‐continuous trials with sludge from two of the mills were also conducted in attempts to develop stable biogas production at loading rates up to 4 g VS L−1. Cobalt addition (0.5 mg L−1) was here found to positively affect the turnover of acetate. High viscosity was a problem in all the experimental reactors and this limited the organic loading rate.

[1]  H. Kyllönen,et al.  Treatment and Characterization of Biological Sludges from the Pulp and Paper Industry , 1988 .

[2]  M. Takashima,et al.  Mineral requirements for methane fermentation , 1990 .

[3]  Antonio M. Martin,et al.  Anaerobic treatment of wastewater produced in the manufacture of cellulosic pulp from wheat straw , 1993 .

[4]  Å. Nordberg,et al.  Improvement of a grass-clover silage-fed biogas process by the addition of cobalt , 1997 .

[5]  Jörg Schwedes,et al.  Anaerobic digestion and dewatering characteristics of mechanically disintegrated excess sludge , 1997 .

[6]  R. Krull,et al.  Disintegration of sewage sludges and influence on anaerobic digestion , 1998 .

[7]  A. Karlsson,et al.  Degradation of phenol under meso- and thermophilic, anaerobic conditions. , 1999, Anaerobe.

[8]  S. A. Parsons,et al.  The Application of Ultrasound as a Pre-Treatment for Anaerobic Digestion , 1999 .

[9]  Joan Mata-Álvarez,et al.  Anaerobic digestion of organic solid wastes. An overview of research achievements and perspectives , 2000 .

[10]  T. Stephenson,et al.  The Impact of Digester Retention Time on Microbial Extracellular Polymer Production and Sludge Dewaterability , 2000 .

[11]  K Kida,et al.  Influence of Ni2+ and Co2+ on methanogenic activity and the amounts of coenzymes involved in methanogenesis. , 2001, Journal of bioscience and bioengineering.

[12]  H. Borén,et al.  Analysis of mono- and diesters of o-phthalic acid by solid-phase extractions with polystyrene-divinylbenzene-based polymers. , 2002, Journal of chromatography. A.

[13]  R. Speece,et al.  Comparative process stability and efficiency of anaerobic digestion; mesophilic vs. thermophilic. , 2002, Water research.

[14]  D Bolzonella,et al.  Anaerobic digestion of organic solid wastes: process behaviour in transient conditions. , 2003, Water science and technology : a journal of the International Association on Water Pollution Research.

[15]  J. Tay,et al.  A comparison of ultrasound treatment on primary and secondary sludges. , 2004, Water science and technology : a journal of the International Association on Water Pollution Research.

[16]  M. Crane,et al.  Ultrasonic sludge treatment for enhanced anaerobic digestion. , 2004, Water science and technology : a journal of the International Association on Water Pollution Research.

[17]  E C Pires,et al.  UASB performance for bleached and unbleached kraft pulp synthetic wastewater treatment. , 2005, Chemosphere.

[18]  S. Chinnaraj,et al.  Implementation of an UASB anaerobic digester at bagasse-based pulp and paper industry , 2006 .

[19]  Brett I. Pletschke,et al.  Enzyme treatment to decrease solids and improve digestion of primary sewage sludge , 2006 .

[20]  Talat Mahmood,et al.  Pretreatment technologies for advancing anaerobic digestion of pulp and paper biotreatment residues. , 2007, Water research.

[21]  J. Jansen,et al.  Strategies for enzyme dosing to enhance anaerobic digestion of sewage sludge , 2007 .

[22]  N. I. Galil,et al.  AEROBIC VS. ANAEROBIC-AEROBIC BIOTREATMENT: PAPER MILL WASTEWATER , 2007 .

[23]  E. Dey,et al.  The function of cation-binding agents in the enzymatic treatment of municipal sludge. , 2008, Water research.

[24]  Mohammad Abu-Orf,et al.  A Comparative Study of Ultrasonic Pretreatment and an Internal Recycle for the Enhancement of Mesophilic Anaerobic Digestion , 2009, Water environment research : a research publication of the Water Environment Federation.

[25]  P. He,et al.  Characteristics of Organic Matters During AnaerobicDigestion of Ultrasonically Pretreated Sludge and theEffects on Sludge Dewaterability , 2009 .

[26]  G. Zeeman,et al.  Pretreatments to enhance the digestibility of lignocellulosic biomass. , 2009, Bioresource technology.

[27]  E. Master,et al.  Pretreatment of pulp mill secondary sludge for high-rate anaerobic conversion to biogas. , 2009, Bioresource technology.

[28]  D. Bagley,et al.  Performance and fouling characteristics of a submerged anaerobic membrane bioreactor for kraft evaporator condensate treatment , 2010, Environmental technology.

[29]  Qi Yang,et al.  Enhanced efficiency of biological excess sludge hydrolysis under anaerobic digestion by additional enzymes. , 2010, Bioresource technology.