The use of respiration indices in the composting process: a review
- 1 February 2006
- journal article
- research article
- Published by SAGE Publications in Waste Management & Research: The Journal for a Sustainable Circular Economy
- Vol. 24 (1), 37-47
- https://doi.org/10.1177/0734242x06062385
Abstract
Respiration is directly related to the metabolic activity of a microbial population. Micro-organisms respire at higher rates in the presence of large amounts of bioavailable organic matter while respiration rate is slower if this type of material is scarce. In the composting process respiration activity has become an important parameter for the determination of the stability of compost. It is also used for the monitoring of the composting process and it is considered an important factor for the estimation of the maturity of the material. A wide range of respirometric protocols has been reported based either on CO2 production, O2 uptake or release of heat. The most common methods are those based on O2 uptake. Respirometric assays are affected by a number of parameters including temperature, humidity, and both incubation and pre-incubation conditions. Results from respirometries are generally expressed as ‘respiration indices’, most of them with their own units and basis. In consequence, some confusion exists when referring and comparing respiration indices. This is particularly important because current and future legislations define and measure the biological stability of waste on the basis of respiration activity of the material. This paper discusses and compares most common respiration indices currently used.Keywords
This publication has 23 references indexed in Scilit:
- Respirometric assays at fixed and process temperatures to monitor composting processBioresource Technology, 2005
- The Respiration Rate of Composting Pig ManureCompost Science & Utilization, 2004
- Biostabilization of municipal solid wasteWaste Management, 2004
- Composting under controlled conditionsEnvironmental Technology, 2003
- A Rapid Microtiter Plate Method To Measure Carbon Dioxide Evolved from Carbon Substrate Amendments so as To Determine the Physiological Profiles of Soil Microbial Communities by Using Whole SoilApplied and Environmental Microbiology, 2003
- Determination of the Stability of MSW Compost Using a Respirometric TechniqueCompost Science & Utilization, 2003
- Respiration Index Determination: A Comparative Study of Different MethodsCompost Science & Utilization, 2003
- Maturity and Stability Evaluation of Composted Yard TrimmingsCompost Science & Utilization, 2003
- The influence of biomass temperature on biostabilization–biodrying of municipal solid wasteBioresource Technology, 2002
- Determination of Biological Stability by Oxygen Uptake on Municipal Solid Waste and Derived ProductsCompost Science & Utilization, 2001