Arabian Journal for Science and Engineering

, Volume 44, Issue 6, pp 5399–5409 | Cite as

Influence of Bacillus subtilis and Pseudomonas aeruginosa BSW and Clinoptilolite Addition on the Biowaste Composting Process

  • Dajana K. GrgićEmail author
  • Marija V. Domanovac
  • Tomislav Domanovac
  • Monika Šabić
  • Matija Cvetnić
  • Vesna O. Bulatović
Research Article - Chemical Engineering


This work aimed the influence of inoculation of Pseudomonas aeruginosa BSW, Bacillus subtilis and zeolite on a biowaste composting process. The composting process of biowaste was conducted without (experiment P1) and with (experiment P2) inoculation of selected bacteria and zeolite. The addition of 4% of zeolite into biowaste displayed the retention of ammonium in composting material. In experiment P2, the emission of ammonia (147 mg \(\text {kg}_{\mathrm{VM}}^{-1})\) was about four times less than in experiment P1 (509 mg \(\text {kg}_{\mathrm{VM}}^{-1})\). The concentration of \(\text {NH}_{4}^{+}\) ions in composting material and in condensate in P1 was 924 mg \(\text {dm}^{-3 }\)and 6588 mg \(\text {dm}^{-3}\) and in P2 9 mg \(\text {dm}^{-3 }\) and 91 mg \(\text {dm}^{-3}\), respectively.\(^{.}\)The volume of produced leachate and the concentration of \(\text {NH}_{4}^{+}\) ions in leachate in P1 was 150 \(\hbox {cm}^{3}\) and 1266 mg \(\text {dm}^{-3 }\) and in P2 75 \(\hbox {cm}^{3}\) and 9 mg \(\text {dm}^{-3}\), respectively. Toxicity Impact Index (TII50) of leachate in P1 and in P2 was 90.1 and 5.4, respectively, which indicated that P1 was extremely toxic leachate. The obtained conversion of composting material in P1 and P2 was 64% and 71%, respectively, which shows that inoculated bacteria accelerated biodegradation process. Degradation of biowaste during composting was described as first-order process, and kinetic parameter \(k_{0}\) and reaction enthalpy were estimated for P1 and P2 [\(k_{0}\) (P1 and P2) \(= 0.021\pm \) 0.001 d\(^{-1}\), \(\Delta H_\mathrm{r}\) (P1 and P2) = 2660 ± 26 kJ \(\text {kg}_{\mathrm{vs}}^{-1}\)].


Composting process Biowaste Leachate Natural zeolite clinoptilolite Inoculation of bacteria Mathematical modelling 


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We gratefully acknowledge the financial support from Croatian Science Foundation through project entitled Modelling of Environmental Aspects of Advanced Water Treatment for Degradation of Priority Pollutants (MEAoWT) (IP-09-2014-7992) and Mineral Promet d.o.o., Croatia on donation of natural zeolite clioptilolite.


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Copyright information

© King Fahd University of Petroleum & Minerals 2019

Authors and Affiliations

  1. 1.Faculty of Chemical Engineering and TechnologyUniversity of ZagrebZagrebCroatia
  2. 2.IPZ Uniprojekt TERRA d.o.o.ZagrebCroatia

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