Modelling hydrolysis: Simultaneous versus sequential biodegradation of the hydrolysable fractions
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International audience
Near-infrared spectrum analysis to determine relationships between biochemical composition and anaerobic digestion perfo...
Near-infrared spectrum analysis coupled with partial least squares regression can predict anaerobic digestion performances. Nonetheless, due to the complexity and diversity of organic matter, a detailed assessment of the effects of the composition of organic matter on biogas production remains a great challenge. Based on 275 samples representing a ...
Potential of using non-inoculated self-aerated immobilized biomass reactor for post-treatment of upflow anaerobic staged...
BACKGROUND: The cake industry produces a heavily polluted wastewater that is characterized by high amounts of suspended solids, lipids, chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and nitrogen components. In this study, assessment of the efficiency of a non-inoculated self-aerated immobilized biomass (SAIB) reactor for post-treat...
Characterizing the variability of food waste quality: A need for efficient valorisation through anaerobic digestion.
Published in Waste management (New York, N.Y.)
In order to determine the variability of food waste (FW) characteristics and the influence of these variable values on the anaerobic digestion (AD) process, FW characteristics from 70 papers were compiled and analysed statistically. Results indicated that FW characteristics values are effectively very variable and that 24% of these variations may b...
Nitrification of leachates from manure composting under field conditions and their use in horticulture
This work aimed to demonstrate the feasibility of nitrification applied to the treatment of leachates formed during composting of cattle and pig manure in order to promote their further use as liquid fertilizer in horticulture. Nitrification trials were successfully conducted in summer and winter seasons under Mediterranean climate conditions. Subs...
Characteristics and composition of fouling caused by pig slurry in a tubular heat exchanger - Recommended cleaning syste...
The structure and composition of the fouling deposits caused by pig slurry heated in a tubular heat exchanger were characterized to understand their formation and thus be able to minimize fouling and define effective routine cleaning methods. Two temperatures (55 °C and 80 °C) were investigated. Two types of fouling were identified: organic/mineral...
Sensors for measuring biodegradable and total organic matter in water
This critical review spans the past two decades and outlines sensors developed for measuring total organic matter (TOM) and biodegradable organic matter (BOM) in water. We report the state of the art of the most significant technologies. Although the focus is on in situ devices, we also mention on-line techniques able to lead to sensors sensu stric...
An interlaboratory study as useful tool for proficiency testing of chemical oxygen demand measurements using solid subst...
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In 2008, the first Proficiency Testing Scheme of Chemical Oxygen Demand (1st COD-PTADG)was conducted to assess the results obtained for different research groups whose fieldwork is mainly anaerobic digestion. This study was performed using four samples, two solid samples as raw materials and two solid samples to prepare high concentration suspended...
A comprehensive method for organic matter characterization in solid wastes in view of assessing their anaerobic biodegra...
Published in Water science and technology : a journal of the International Association on Water Pollution Research
The calculation of the anaerobic biodegradability requires the knowledge of the COD of the organic waste considered. Unfortunately, standard COD measurements are not available for solid wastes. In addition, sample processing generally requires a drying step (for TS and VS assessment for instance). What is shown here is that important amounts of COD...
Assessing chemical oxygen demand and nitrogen conversions in a multi-stage activated sludge plant with alternating aerat...
This paper provides a detailed investigation of the mass transfers involved in chemical oxygen demand (COD) and N removal in an intermittent aeration activated sludge plant, as described by the widely used ASM1 model. The model was calibrated and validated on a data set obtained during three intensive sampling campaigns. The mass transfers of COD a...
