Disintegration of Biological Sludge by Electro-oxidation Process with Different Electrode Couples

  • Gulbin ErdenEmail author
Original Paper


This study deals with disintegration of biological sludge by electro-oxidation process for the purpose of improving anaerobic biodegradability of sludge. A pair of titanium (Ti) electrode and a pair of titanium electrodes coated with RuO2 (Ti/RuO2) used for both anode and cathode and their effects on anaerobic sludge bio-processing were investigated. Process conditions were optimized by response surface methodology. Disintegration degree (DD) parameter was used as system response. Optimum conditions were found to be 20 V for 30 min for both electrode couples. DD = 13.9% was achieved for Ti electrodes application, addition of supporting electrolyte (10 g/L Na2SO4) improved disintegration the performance of sludge (DD = 17.3%). Ti/RuO2 electrodes provided higher DD values and the highest DD were determined as 16.6% and 10 g/L Na2SO4 supporting electrolyte addition increased the DD value to 20.4%. Biochemical methane potential (BMP) test results suggest that electro-oxidation enhanced the anaerobic biodegradability of sludge. Electro-oxidation with Ti/RuO2 electrodes allowed more methane gas formation in BMP test. Disintegrated sludge with the pair of Ti and Ti/RuO2 electrodes provided 11.8% and 34.1% higher methane production comparing to the raw sludge at the end of the 40 days of incubation, respectively.


Anaerobic digestion Biological sludge Disintegration Electro-oxidation Response surface methodology 



The author thanks to The Scientific and Technological Research Council of Turkey (TUBITAK) for supporting the study under award # 112Y177: The evaluation of the applicability of electro-oxidation technic for the pre-treatment of municipal sewage sludge.


  1. 1.
    Bougrier, C., Carrère, H., Delgenes, J.P.: Solubilisation of waste-activated sludge by ultrasonic treatment. Chem. Eng. J. 106, 163–169 (2005)CrossRefGoogle Scholar
  2. 2.
    Zhang, J., Zhang, J., Tian, Y., Li, N., Kong, L., Sun, L., Yu, M., Zuo, W.: Changes of physicochemical properties of sewage sludge during ozonation treatment: Correlation to sludge dewaterability. Chem. Eng. J. 301, 238–248 (2016)CrossRefGoogle Scholar
  3. 3.
    Chacana, J., Alizadeh, S., Labelle, M.A., Laporte, A., Hawari, J., Barbeau, B., Comeau, Y.: Effect of ozonation on anaerobic digestion sludge activity and viability. Chemosphere 176, 405–411 (2017)CrossRefGoogle Scholar
  4. 4.
    Zielewicz, E.: Effects of ultrasonic disintegration of excess sewage sludge. Appl. Acoust. 103B, 182–189 (2016)CrossRefGoogle Scholar
  5. 5.
    Erden, G., Filibeli, A.: Ultrasonic pre-treatment of biological sludge: Consequences for disintegration, anaerobic biodegradability, and filterability. J. Chem. Technol. Biotechnol. 85, 145–150 (2010)CrossRefGoogle Scholar
  6. 6.
    Erden, G., Filibeli, A.: Improving anaerobic biodegradability of biological sludges by Fenton pre-treatment: Effects on single stage and two-stage anaerobic digestion. Desalt. 251(1–3), 58–63 (2010)CrossRefGoogle Scholar
  7. 7.
    Sahinkaya, S., Kalıpcı, E., Aras, S.: Disintegration of waste activated sludge by different applications of Fenton process. Process Saf. Environ. Prot. 93, 275–281 (2015)Google Scholar
  8. 8.
    Tian, X., Trzcinski, A.P., Lin, L.L., Ng, W.J.: Impact of ozone assisted ultrasonication pre-treatment on anaerobic digestibility of sewage sludge. J. Environ. Sci. 33, 29–38 (2015)CrossRefGoogle Scholar
  9. 9.
    Packyam, G.S., Kavitha, S., Kumar, S.A., Kaliappan, S., Yeom, I.T., Banu, J.R.: Effect of sonically induced deflocculation on the efficiency of ozone mediated partial sludge disintegration for improved production of biogas. Ultrason. Sonochem. 26, 241–248 (2015)CrossRefGoogle Scholar
  10. 10.
    Yu, Q., Jin, X., Zhang, Y.: Sequential pretreatment for cell disintegration of municipal sludge in a neutral Bio-electro-Fenton system. Water Res. 134, 45–56 (2018)Google Scholar
  11. 11.
    Sopaj, F., Rodrigo, M.A., Oturan, N., Podvorica, F.I., Pinson, J., Oturan, M.A.: Influence of the anode materials on the electrochemical oxidation efficiency. Application to oxidative degradation of the pharmaceutical amoxicillin. Chem. Eng. J. 262, 286–294 (2015)CrossRefGoogle Scholar
  12. 12.
    Chiangi, L.C., Changi, J.E., Wen, T.C.: Indirect oxidation effect in electrochemical oxidation treatment of landfill leachate. Wat. Res. 29(2), 671–678 (1995)CrossRefGoogle Scholar
  13. 13.
    Kim, S., Choi, S.K., Yoon, B.Y., Lim, S.K., Park, H.: Effects of electrolyte on the electrocatalytic activities of RuO2/Ti and Sb–SnO2/Ti anodes for water treatment. Appl. Catal. B Environ. 97(1–2), 135–141 (2010)CrossRefGoogle Scholar
  14. 14.
    Chu, Y.Y., Wang, W.J., Wang, M.: Anodic oxidation process for the degradation of 2,4-dichlorophenol in aqueous solution and the enhancement of biodegradability. J. Hazard. Mater. 180(1–3), 247–252 (2010)CrossRefGoogle Scholar
  15. 15.
    Panizza, M., Cerisola, G.: Olive mill wastewater treatment by anodic oxidation with parallel plate electrodes. Water Res. 40(6), 1179–1184 (2006)CrossRefGoogle Scholar
  16. 16.
    Yuan, H., Zhu, N., Song, L.: Conditioning of sewage sludge with electrolysis: effectiveness and optimizing study to improve dewaterability. Bioresour. Technol. 101(12), 4285–4290 (2010)CrossRefGoogle Scholar
  17. 17.
    Yuan, H., Cheng, X., Chen, S., Zhu, N., Zhou, Z.: New sludge pretreatment method to improve dewaterability of waste activated sludge. Bioresour. Technol. 102(10), 5659–5664 (2011)CrossRefGoogle Scholar
  18. 18.
    Song, L.J., Zhu, N.W., Yuan, H.P., Hong, Y., Ding, J.: Enhancement of waste activated sludge aerobic digestion by electrochemical pre-treatment. Water Res. 44(15), 4371–4378 (2010)CrossRefGoogle Scholar
  19. 19.
    APHA.: Standard methods for the examination of water and wastewater. 21, APHA, Washington, DC: (2005)Google Scholar
  20. 20.
    Terezo, A.J., Pereira, E.J.: Preparation and characterisation of Ti/RuO2 anodes obtained by sol–gel and conventional routes. Mater. Lett. 53(4–5), 339–345 (2002)CrossRefGoogle Scholar
  21. 21.
    Mason, R.L., Gunst, R.F., Hess, J.L.: Statistical design and analysis of experiments, with applications to engineering and science. Wiley-Interscience, New York (2003)zbMATHGoogle Scholar
  22. 22.
    Owen, W.F., Stuckey, D.C., Healy, J.B., Young, L.Y., McCarty, P.L.: Bioassay for monitoring biochemical methane potential and anaerobic toxicity. Water Res. 13, 485–492 (1979)CrossRefGoogle Scholar
  23. 23.
    Speece, R.E.: Anaerobic biotechnology for industrial wastewater. Archae Press, Nashville (1996)Google Scholar
  24. 24.
    Razo-Flores, E., Luijton, M., Donlon, B.A., Lettinga, G., Field, J.A.: Biodegradation of selected azo dye under methanogenic conditions. Water Sci.Technol. 36, 65–72 (1997)CrossRefGoogle Scholar
  25. 25.
    Muller, J.A.: Disintegration as a key-step in sewage sludge treatment. Water Sci. Technol. 41, 123–130 (2000)CrossRefGoogle Scholar
  26. 26.
    Parajo, J.C., Alonso, J.L., Lage, M.A., Vazquez, D.: Empirical modeling of eucalyptus wood processing. Bioprocess Eng. 8, 129–136 (1992)CrossRefGoogle Scholar
  27. 27.
    Beg, Q., Sahai, V., Gupta, R.: Statistical media optimization and alkaline protease production from Bacillus mojavensis in a bioreactor. Process Biochem. 39, 203–209 (2003)CrossRefGoogle Scholar
  28. 28.
    Neyens, E., Baeyens, J., Weemaes, B., De heyder, B.: Pilotscale peroxidation (H2O2) of sewage sludge. J. Hazard. Mat. B98, 91–106 (2003)CrossRefGoogle Scholar
  29. 29.
    Zhang, G., Yang, J., Liu, H., Zhang, J.: Sludge ozonation: disintegration, supernatant changes and mechanisms. Bioresour. Technol. 100, 1505–1509 (2009)CrossRefGoogle Scholar
  30. 30.
    Panizza, M., Cerisola, G.: Direct and mediated anodic oxidation of organic pollutants. Chem. Rev. 109, 6541–6569 (2009)CrossRefGoogle Scholar
  31. 31.
    Xu, J., Yuan, H., Lin, J., Yuan, W.: Evaluation of thermal, thermal-alkaline, alkaline and electrochemical pretreatments on sludge to enhance anaerobic biogas production. J. Taiwan Inst. Chem. Eng. 45, 2531–2536 (2014)CrossRefGoogle Scholar
  32. 32.
    Erden, G., Filibeli, A.: Effects of Fenton pre-treatment on waste activated sludge properties. Clean Soil Air Water. 39(7), 626–632 (2011)CrossRefGoogle Scholar
  33. 33.
    Erden, G., Filibeli, A.: Ozone oxidation of biological sludge: Effects on disintegration, anaerobic biodegradability, and filterability. Environ. Progress Sustain. Energy 30, 377–383 (2011)CrossRefGoogle Scholar

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© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Department of Environmental EngineeringPamukkale UniversityDenizliTurkey

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