Effect of initial C/N ratio on composting of two-phase olive mill pomace, dairy manure, and straw
Environmental Progress and Sustainable Energy, vol.40, no.2, 2021 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 40 Issue: 2
- Publication Date: 2021
- Doi Number: 10.1002/ep.13517
- Journal Name: Environmental Progress and Sustainable Energy
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Applied Science & Technology Source, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, Chemical Abstracts Core, Compendex, Computer & Applied Sciences, Environment Index, Greenfile, INSPEC, Pollution Abstracts
- Keywords: first-order rate kinetics, relative heat generation, throughput capacity, two-phase olive mill pomace
- Isparta University of Applied Sciences Affiliated: No
Abstract
Composting plants should be operated at a high degradation rate in order to lower their capital and operational costs. Initial C/N ratio is one of the most influential factors on the composting process. This study aimed to determine the impacts of initial C/N ratio on operational composting parameters of two-phase olive mill pomace with separated dairy manure. Five initial C/N ratios ranging from 29.43 to 43.33 were examined using fifteen 100 L cylindrical reactors. The highest decomposition rate was estimated at 0.02 day−1 with the C/N ratio of 34.49. The maximum relative heat generation was obtained with the C/N ratio of 36.07. The C/N ratio of ≅33 reduced the composting cost of process-based total airflow supplied per dry matter and organic matter loss. The maximum throughput capacity was obtained when the compost blend had the C/N ratio of ≅37.24. It was concluded that operating the composting of two-phase olive mill waste, separated dairy manure, and straw with the boundary of the initial C/N ratios between 33 and 37 was recommended.