Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 435053
Title Effect of ammonia on the anaerobic hydrolysis of cellulose and tributyrin
Author(s) Vasconcelos Fernandes, T.; Keesman, K.J.; Zeeman, G.; Lier, J.B. van
Source Biomass and Bioenergy 47 (2012). - ISSN 0961-9534 - p. 316 - 323.
Department(s) Sub-department of Environmental Technology
Biomass Refinery and Process Dynamics
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) thermophilic digestion - methanogenic sludge - bounded noise - cow manure - kinetics - inhibition - nitrogen - identification - waste
Abstract Ammonia nitrogen is one of the most common inhibitors in the anaerobic digestion of complex wastes containing high concentrations of ammonia like animal manures, blackwater and waste oil from gastronomy. The inhibiting effect of ammonia on methanogenesis has been well established. In contrast, the knowledge on the effect of ammonia on organic matter hydrolysis is rather limited. This study focuses on evaluating the effect of ammonia on the hydrolysis of carbohydrates and lipids, which are commonly found in biomass. Batch digestion of tributyrin and cellulose at varying ammonia concentrations were performed, using biomass adapted to 4.9 g NH4+–N.l-1. From this experimental study it was concluded that total ammonia nitrogen in the range of 2.4–7.8 g NH4+–N.l-1 (283–957 mg NH3–N.l-1) does not inhibit the hydrolysis of tributyrin or cellulose. This result is further confirmed by mathematical analysis of the estimated variation of the first-order hydrolysis constant as a function of the total ammonia concentration.
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