The present study aims to enhance the biomethane production potential of microalgae via a dual disintegration process. During this process, the microalgae biomass was firstly subjected to cell wall weakening by thermochemical disintegration (TC) (50 to 80 °C), pH adjustment with alkali, NaOH (6 to 10) and time (0 to 10 min) and, secondly, by bacterial disintegration (BD). TC-BD disintegration was comparatively higher (33 %) than BD (24 %), TC (8.5 %), and control (7 %). A more significant VFA accumulation of 2816 mg/L was recorded for TC-BD. Similarly, a greater substrate anaerobic biodegradability was achieved in TC-BD (0.32 g COD /g COD) than BD (0.21 g COD /g COD), TC alone (0.09 gCOD/g COD) and control (0.08 g COD /g COD), respectively. The TC-BD achieves a positive net profit and an energy ratio of + 0.12 GJ/d and 1.03. The proposed dual disintegration has a promising future for commercialization.

中文翻译：

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微藻生物质的双重分解以实现具有成本效益的生物甲烷生产：能源和成本评估

本研究旨在通过双重分解过程提高微藻的生物甲烷生产潜力。在此过程中，微藻生物质首先通过热化学分解 (TC)（50 至 80 °C）、用碱、NaOH（6 至 10）和时间（0 至 10 分钟）调节 pH 值来弱化细胞壁，其次，通过细菌分解（BD）。 TC-BD 崩解率 (33%) 高于 BD (24%)、TC (8.5%) 和对照 (7%)。 TC-BD 记录了更显着的 VFA 积累，为 2816 mg/L。类似地，TC-BD (0.32 g COD /g COD) 比 BD (0.21 g COD /g COD)、单独 TC (0.09 gCOD/g COD) 和对照 (0.08 g COD /g COD) 实现了更高的底物厌氧生物降解性。 ）， 分别。 TC-BD 实现了正净利润，能源比分别为 + 0.12 GJ/d 和 1.03。所提出的双重分解具有商业化的广阔前景。