Anaerobic co-digestion of chicken and cattle manures: Free ammonia inhibition

Mahmut Altinbas*, Osman Ali Cicek

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


In this study, 4 different anaerobic digesters were set by keeping the chicken manure ratios as 0%, 30%, 70%, and 100% by completing the remaining portions with cattle manures. According to the results, the highest methane production potentials were 144 ± 7, 201 ± 12, 217 ± 3, 256 ± 5 L/kg VSadded, respectively. After reaching the highest total nitrogen concentrations in semi continuously operated reactors, methane level has dropped due to free ammonia (as high as 652 mg NH3-N/L) inhibition stimulated by high pH in all reactors. Recovery of the methane production following free ammonia inhibition was greatly succeeded although deficiency in essential trace elements such as Cd and Ni. Nevertheless, it was shown that cattle manure alone can be a good co-substrate for the chicken manure.

Original languageEnglish
Pages (from-to)1097-1109
Number of pages13
JournalEnergy Sources, Part A: Recovery, Utilization and Environmental Effects
Issue number9
Publication statusPublished - 3 May 2019

Bibliographical note

Publisher Copyright:
© 2018, © 2018 Taylor & Francis Group, LLC.


This work was supported by the Istanbul Technical University Research Fund [No. 34445].

FundersFunder number
Istanbul Technical University Research Fund34445


    • Anaerobic digestion
    • cattle manure
    • chicken manure
    • co-digestion
    • free ammonia inhibition


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