Monitoring of greenhouse gas emissions and compost quality during olive mill waste co-composting at industrial scale: The effect of N and C sources.

Olive mill wastes (OMW) management by composting allows to obtain valuable fertilizing products, but also implies significant fluxes of greenhouse gases (GHG). For a proper OMW composting, high C- and N co-substrates are necessary, but little is known concerning their effect on GHG emissions in OMW-industrial scale composting. In this study, different co-composting agents (cattle manure (CM), poultry manure (PM), sheep manure (SM) and pig slurry solid fraction (PSSF) as N sources and olive leaves (OLW) and urban pruning residues (UPR) as bulking agents and C sources) were used for OMW composting at industrial scale.

A crucial step in assisted reproduction technology: human embryo selection using metabolomic evaluation.

We present a new methodology to predict embryo viability in assisted reproductive technology (ART) treatments by determining the relative amino acid concentrations in human embryo culture medium on day 3, using high-performance liquid chromatography with mass spectroscopy analysis without derivatization. The model was performed with soft independent modeling of class analogy for the samples from nonpregnancy and pregnancy cases.

Study of the evolution of organic matter during composting of winery and distillery residues by classical and chemometric analysis.

The aim of the present paper is to evaluate the changes of organic matter during the composting process of fresh winery and distillery residues (WDR) by means of classical and chemometric analysis of (13)C cross-polarization magic angle spinning (CPMAS) NMR and Fourier transform infrared (FT-IR) spectra. (13)C NMR spectroscopy displayed a preferential biodegradation of carbohydrates as well as an accumulation of aliphatic chains (cutin- and suberin-like substances). This preferential biodegradation of the organic fractions reduces the landfill emission potential.