Hydrolysis of particulate organics in activated sludge systems

Enhancement in biodegradability of distillery wastewater using enzymatic pretreatment

“…Based on the past studies, one can conclude that the treatability of the effluent wastewater depends strongly on the molecular weight distribution of the contaminants (Levine et al, 1985;Haldane and Logan, 1994;Ubukata, 1997;Eliosov and Argaman, 1995;Confer and Logan, 1997;Grady et al, 1984).…”

A mathematical model of a high sulphate wastewater anaerobic treatment system

“…Typically a first order function is used to model anaerobic sludge hydrolysis (East man and Ferguson, 1981;Lilley et al, 1990;Eliosov and Argaman, 1995;Shimizu et al, 1993), although other expression such as the Contois model have been used to describe hydrolysis in aerobic systems (Dold et al, 1980). The first order approach has been shown to fit experimental data extremely well and it is doubtful if a more complicated expression is necessary.…”

Improving anaerobic sewage sludge digestion by implementation of a hyper-thermophilic prehydrolysis step

“…In practice, only half of the organic material is converted and therefore there is a large potential for increasing the biogas yield of sewage sludge. The optimisation of the anaerobic digestion process strongly depends on the increase of the hydrolysis efficiency since the organic matter of sewage sludge mainly exists in particulate form and hydrolysis is the rate-limiting step of the whole process (Vandevoorde et al, 1988;Eliosov and Argaman, 1995;Eastman and Ferguson, 1981). Novel pre-treatment methods have been developed in order to disintegrate the flock structure of the sludge, improve the solubility of solid organic matter and consequently increase the methane production rate.…”