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Updated: Feb 6, 2026

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
Establishment of stable microalgal-bacterial consortium in liquid digestate for nutrient removal and biomass
Yiqi Jiang1, Hong Wang1, Caifang Zhao2
1Biogas Institute of Ministry of Agriculture, Chengdu 610041, PR China; Key Laboratory of Development and Application of Rural Renewable Energy, Chengdu 610041, PR China.
Abstract:
In this study, a microalgal-bacterial consortium (MBC) was established in liquid digestate (LD) by optimizing sequencing batch reactor (SBR) operating parameters and microalgae inoculation to address the abovementioned challenges. The bacteria from LD SBR-Activated Sludge System effluent under the optimum conditions of 25 °C, 7.0 g/L MLSS, 5 mg/L DO concentration, and 6 h hydraulic retention time with 0.5 mg/L DW Chlorella sp. BWY-1 could form stable MBCs outdoors in an airlift photoreactor. The stable MBC facilitates the continuous removal of nitrogen and phosphorus, promotes the accumulation of biomass and lipids, and contributes to the improvement of the sedimentation. The results from this study provided a new technique for the purification and utilization of LD, more importantly decreasing the environmental threat caused by improperly processed LD.
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