Anaerobic Biodegradability of Digestates – Influence of and Correlations for Klason lignin,Chemical Engineering & Technology

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Anaerobic Biodegradability of Digestates – Influence of and Correlations for Klason lignin
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2019-11-04 , DOI: 10.1002/ceat.201900355
Torsten Mächtig ₁ , René Casaretto ₂ , Christian R. Moschner ₁ , Jens Born ₃ , Jens Bo Holm-Nielsen ₂ , Eberhard Hartung ₁

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Appropriate evaluation of the process performance of biogas plants needs to consider the anaerobic biodegradability of the used biomass. Anaerobic biodegradability is limited by lignin, which is part in most substrates and, by extension, in digestates of biogas plants. Previous research has shown that the content of acid detergent lignin (ADL) in digestates can be predicted from measured gross calorific values (GCVs). The correlation of GCV of 34 digestate samples to an alternative measure for lignin, the Klason lignin (KL), is evaluated as well as the correlation of KL content and other chemical constituents to residual biomethane potential (BMP). Results indicate a very low correlation of chemical composition to GCV and BMP. A correlation of GCV to BMP was not observable. The results let conclude that evaluation of anaerobic biodegradability of digestates by measuring KL or predicting KL from GCV is not productive.

中文翻译：

消化物的厌氧生物降解性-Klason木质素的影响及其相关性

对沼气厂工艺性能的适当评估需要考虑所用生物质的厌氧生物降解性。厌氧生物可降解性受到木质素的限制，木质素是大多数底物中的一部分，并且延伸到沼气厂的消化物中。先前的研究表明，可以通过测得的总热值（GCV s）预测消化液中酸性洗涤剂木质素（ADL）的含量。评估了34种消化样品的GCV与木质素替代测定方法Klason木质素（KL）的相关性，以及KL含量和其他化学成分与残留生物甲烷势（BMP）的相关性。结果表明，化学成分与GCV和BMP。无法观察到GCV与BMP的相关性。该结果可以得出结论，通过测量KL或通过GCV预测KL评估消化物的厌氧生物降解性没有效果。

更新日期：2019-11-04

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