Compost Science Complete scientific data on compost process control and end product quality

PERSPECTIVE

Compost Science & Utilization, (2007), Vol. 15, No. 3, 139

Wide Diversity In The Research Laboratory

DESPITE a lack of scientific data regarding rainfall/runoff relationships at composting sites, specific regulatory requirements exist in many jurisdictions that offer specific guidance on the size of storm water detention ponds. These design features are intended to ensure that precipitation drains from the

composting pad quickly. The unit hydrograph method was used to model the water level in a detention pond, reports a paper from the University of New Brunswick, Canada in this issue of Compost Science & Utilization (See page 142).
Another paper in this issue reports on the biofiltration impacts of sewage sludge and yard waste compost specifically for ammonia removal (page 151). Filter efficiency was investigated using both small and pilot-scale filter columns by members of the Environmental Engineering staff at Aalborg University in Denmark. Both composts produced effluents with very low ammonia content. The columns generally took about one week to achieve stable effluent concentrations.
From the Royal Horticultural Society in Surrey, United Kingdom, P.D. Alexander describes the effect of turning and vessel type on temperatures and composition in backyard composting (page 167). “It would appear that vessel volume (rather than type) is important in generating and maintaining heat. It would also appear that turning vessels does lead to an increase in mean temperature. … Further investigations to identify minimum volume of vessel to stimulate and retain temperature would be of interest as would identifying the quality of the resultant compost.”
Another study - “Effect of Oxygen Concentration on Composting Process and Maturity” - by staff at China Agricultural University, First Land Reclamation University and the University of Tokyo reports on how the thermophilic stage above 50°C lasted 23 days under microaerobic composting followed by a rapid decline in temperature (see page 184).
Other research in this issue compares biogenic emissions from green waste with the natural decay to composting the same feedstock reported by Fatih Büyüksönmez and Jason Evans; Horse Manure and Cranberry Fruit Kinetics with Measures of Stability by J.C. Ramirez-Perez, Peter Strom and Uta Krogmann of Rutgers University; Responses of Flower Species to Commercial Growth Media Substituted with Vermicomposts by researchers at the University of Wales and Ohio State University; and Effects of Short-Term Application on Soil Properties and Nutrition of Maize Plants by F. Tambone, P. Genevini and F. Adani with the University of Milan, Italy.
As pointed out previously, these studies reflect the interconnectedness of concepts that reflect the nature of composting.