This study aimed at exploring filamentous microalgae (Tribonema sp.) as an advantageous co-substrate for anaerobic digestion (AD) of pig manure. Its impacts on the AD performance were assessed in terms of methane yield, energy conversion efficiency, digestion kinetics, and digestate dewaterability. The microalgae substantially improved methane yield, AD kinetics, and digestate dewaterability of the AD process. The enhancement in methane yield ranged from 2 to 27.4%, with the maximum enhancement (corresponding to an energy conversion efficiency of 81%) occurring at a mixing ratio of 1:1 (VS basis). The AD kinetics was improved as indicated by the increased hydrolysis rate constants and diminished lag time. The specific resistance to filtration (SRF) of the digestate decreased significantly with the increasing proportion of the microalgae in the co-substrates, which would facilitate digestate processing and valorisation. Subsequently, the high biomass productivity of the microalgae (441 mg/L/d) in liquid digestate would enable sustainable bioenergy production through nutrient recycling.

这项研究旨在探索丝状微藻（Tribonemasp。）作为猪粪厌氧消化（AD）的有利共底物。通过甲烷产量，能量转化效率，消化动力学和消化脱水能力评估了其对AD性能的影响。微藻显着提高了甲烷产量，AD动力学和AD工艺的消化脱水能力。甲烷收率的提高幅度在2％至27.4％之间，最大的提高幅度（对应于81％的能量转换效率）出现在1：1（以VS为基准）的混合比下。如增加的水解速率常数和减少的滞后时间所示，AD动力学得到改善。随着共基质中微藻比例的增加，消化物的比过滤抗性（SRF）显着降低，这将有助于消化加工和增值。随后，液体消化液中微藻的高生物量生产率（441 mg / L / d）将通过营养物循环实现可持续的生物能源生产。