Lignin depolymerisation and utilisation by bacteria

Lignin compound wastes are generated as a result of agricultural and industrial practices. Microorganism-mediated bio-catalytic processes can depolymerise and utilise lignin eco-friendly. Although fungi have been studied since several decades for their ability to depolymerise lignin, strict growth conditions of fungus limit its industrial application. Compared with fungi, bacteria can tolerate wider pH, temperature, oxygen ranges and are easy to manipulate. Several studies have focused on bacteria involved in the process of lignin depolymerisation and utilisation. Pseudomonas have been used for paper mill wastewater treatment while Rhodococcus are widely reported to accumulate lipid. In this review, the recent studies on bacterial utilisation in paper wastewater treatment, lignin conversion to biofuels, bioplastic, biofertilisers and other value-added chemicals are summarised. As bacteria possess remarkable advantages in industrial production, they may play a promising role in the future commercial lignin utilisation.

Authors: Xu R, Zhang K, Liu P, Han H, Zhao S, Kakade A, Khan A, Du D, Li X. ; Full Source: Bioresource Technology. 2018 Aug 30. pii: S0960-8524(18)31222-7. doi: 10.1016/j.biortech.2018.08.118. [Epub ahead of print]