Evolution of microbial populations, humic and fulvic acids on compost from Grape pomace

Pisco is a main distillate spirit in Chile and Peru. This product is obtained from the muscatel grape fermentation and itproduction reach from 30- 50 millions of liters by year, this industry generates a large amount of residues reachingabout 12-15 ton/ha, especially in summer and fall. Composting process results a good option to correct disposal ofwastes and many microbiological changes provides to final compost, properties to maintain and improve the soil qualityin terms of physical, chemical and biological properties.

Further Authors:
R. Ortega Blu - Universidad Técnica Federico Santa María
M.M Martínez Salgado - Institute of Crop Science

To evaluate the evolution of microbial populations and enzymatic activities and its relation with the production ofhumic and fulvic acids, different composting treatments were proposed, using grape pomace (skin and seeds) and bunchraquises, horse and goat manure, and pruning oat residues. There were organized 9 treatments with 3 repetitions eachone, using the turned pile system with periodic turning (each 10 days); during a 180-day period at beginning of thetemperature stabilization (120 days) the piles were analyzed. It was determinated parameters related with microbialpopulations (heterotrophic bacteria, fungi and yeast, phosphate solubilizers) and hydrolytic groups: cellulolytic,proteolytic and amilolytic microorganisms. At the same time some enzymatic activity (β glucosidase, phosphatase, andurease), and chemical composition (pH, electrical conductivity, N-NH4/N-NO3 ratio, organic matter, humic acids andfulvic acids) were determined. Main effects and the interactions were evaluated by statistical analysis, comparing meansby ANOVA, and correlation were determinated by Pearson’s correlation coefficient (p=0,05).It was possible to quantify the populations of different microorganisms on the compost, which using the organic matteras a complex substrate, produces an important amount of different enzymes that promote the mineralization producingstable forms of carbon as humic substances. Microbial populations as cellulolytic and fungi and yeast reachedpopulations about 8,0 and 6,91 logarithmic units respectively, and presented statistical differences (p<0.001) betweentreatments product of the inherent characteristics of the substrates uses for this co-composting process. Aftercomposting process, the organic amendment resulted with 40 -68% OM (p<0,001) and grape pomace (91%) andpruning residues/oat straw (5%), which presented high level of organic matter. Most of treatments were slightlyalkaline, with pH between 8,0 to 8,5, and others were closer to neutral pH. Results suggest that concentration of humicand fulvic acids at the final of the study could be explained because of the availability of nutrients that incentive themetabolisms microorganisms as fungi and yeast and the production of specific enzymes as β- glucosidase.Enzymatic activity produced by microorganisms showed a decrease, when populations as heterotrophic bacteria,phosphate solubilizers, cellulolytic microorganisms were lower; in general β - glucosidase and phosphatase decrease onthe time, but urease activity tend to increase at the final of the process, it would be explained because of the degradationof organic compounds as proteins on the maturation phase. Statistical analysis, indicated positive and significantcorrelation between β -glucosidase activity and humic substances production (r= 0.333, p=0.01), and between fulvicacids and fungi and yeast count (r=-0.447, p<0.001), heterotrophic bacteria (r=-0.261, p=0.04), and phosphatesolubilizers (r= -0.396, p= 0.04).As a conclusion, it was possible to determinate, changes in time, and positive correlations between production of humicacids and heterotrophic bacteria, especially on the co-composting process of grape pomace and goat manure, it suggest that this parameters would be used as quality indicators.

Copyright: © European Compost Network ECN e.V.
Quelle: Orbit 2012 (Juni 2012)
Seiten: 9
Preis inkl. MwSt.: € 9,00
Autor: MSc Ana B. Torres

Artikel weiterleiten In den Warenkorb legen Artikel kommentieren

Diese Fachartikel könnten Sie auch interessieren:

Effects of alkaline pretreatment on the anaerobic digestion process of vegetables wastes
© European Compost Network ECN e.V. (6/2012)
Methane is produced by methanogenic bacteria from acetic acid, hydrogen and carbon dioxide and from other substrates of which formic acid and methanol are the most important (Bouallagui et al., 2005) during the anaerobic digestion of organic biomass. The objectives of this study consisted in setting up laboratory–scale biochemical methane potential (BMP) assay digesters at mesophilic conditions to assess the effectiveness of alkaline (NaOH) pretreatment in improving the anaerobic digestion process for biogas production from mixed vegetable wastes. Further Authors: A. Mudhoo - National Research Chair in Solid Waste Management, Mauritius V.D. Ramdeen - National Research Chair in Solid Waste Management, Mauritius

Anaerobic co-digestion of brown water with kitchen waste in decentralized, source-separation-based sanitation concepts
© European Compost Network ECN e.V. (6/2012)
Current centralized sanitation systems adopted by many developed and developing countries minimize the exposure of wastewater to citizens by flushing them away from households. However, the transportation process consumes large amounts of energy and water and gives rise to diluted sewage. In contrast, decentralized sanitation systems that treat source separated wastewaters would encourage the recycling of nutrients for agriculture, reduce household water consumption significantly and generate a source of clean energy. This study is initiated by an attempt to redefine urban communities as renewable resource recovery centres through the adaptation of “decentralized and source-separationbased sanitation concepts. Further Authors: R. Rajinikanth - Nanyang Technological University, Singapore Y. Mao - Nanyang Technological University, Singapore I. Ho - Nanyang Technological University, Singapore A. Ahamed - Nanyang Technological University, Singapore J. Y. Wang - Nanyang Technological University, Singapore

Compost and fermentation residues used as litter materials in dairy farming
© European Compost Network ECN e.V. (6/2012)
In dairy farming, litter materials have an essential influence on health and production performance of animals and therefore, on the quality of the comestible milk. As straw has recently become an essential cost factor in dairy farming, alternative options are in demand. In this study, selected materials were tested for their hygienic-microbiological quality, i.e. compost barns, litter materials from dry fermentation residues as well as composted fermentation residues, composted garden and forest waste. Further Author: K. Schwarzkopf - University of Hohenheim

Multi-component heat and mass transport model for composting process: Experimental validation
© European Compost Network ECN e.V. (6/2012)
Composting consists in an aerobic process where the organic matter from wastes is biodegraded and converted into a stable granular material called compost. Even if composting is considered to be based on natural phenomenon, it is governed by very complex mechanisms, involving many parameters such as quality and accessibility of the nutriments for micro-organisms, local oxygen content, temperature of the medium, pH, moisture content, and so on (Mustin, 1987, Diaz et al., 2007;). These parameters directly affect biodegradation kinetics. Moreover, they are interdependent and impacted by the operating conditions, which make difficult the understanding of the process.

Microbial degradation of pesticides wastes in rustics devices type biobeds: The Biobacs
© European Compost Network ECN e.V. (6/2012)
Derived from the system of biological beds proposed by Swedish researchers, called biobeds, and from the Bayer Crop Science system called Phytobac®, or the biobac, is a tank insulated from the subsoil and filled with a mixture of organic and mineral materials. Thanks to the developed biological processes in them, the biobeds can provide simple and attractive solutions for the confinement and treatment of pesticide wastes. A biobac can last for up to 8 to 10 years. Despite the increasing interest shown for these rustic processes of bioremediation, limited data is available on their efficiency and monitoring. Biobacs specifications may vary with environmental conditions, waste volume and composition and pesticide concentration. The cost and availability of “carrier materials” and organic substrates used to support microbial activity must also be considered (biomixes). All these aspects need to be considered when improving biobeds efficiency. Further Author: J.C. Fournier - UMR Microbiologie et Géochimie des sols



 Angemeldet bleiben

Passwort vergessen?

Der ASK Wissenspool
Mit Klick auf die jüngste Ausgabe des Content -Partners zeigt sich das gesamte Angebot des Partners

Selbst Partner werden?
Dann interessiert Sie sicher das ASK win - win Prinzip:
ASK stellt kostenlos die Abwicklungs- und Marketingplattform - die Partner stellen den Content.
Umsätze werden im Verhältnis 30 zu 70 (70% für den Content Partner) geteilt.

Neu in ASK? Dann gleich registrieren und Vorteile nutzen...