The search for renewable energies has been one of the biggest challenges of the last decades. Sludge and solid wastes of many sources have been used to produce biogas of high calorific value. Thus, this work aimed to evaluate the biogas production of solid waste originating from a tannery that uses chromium salts as a tanning agent and to characterize the physicochemical parameters and microbial composition of the biogas-producing biomass. Wastes were collected and the parameters were evaluated at the initial and final time points of the anaerobic incubation process. At the end of 150 days, there was a production of 26.1 mL g-1 VSS of biogas with 52% of methane. The highest amount of biomethane observed was related to the archaeal family Methanosaetaceae and bacterial order Bacteroidales. Knowledge about changes in the microbial composition can provide tools for manipulation, isolation, and inoculation of the microorganisms inside the bioreactors to maximize methane production.

中文翻译：

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制革厂固体废物厌氧消化产生的沼气由细菌纲细菌科和古细菌属甲藻科的协会驱动。

寻找可再生能源一直是过去几十年来最大的挑战之一。许多来源的污泥和固体废物已被用于生产高热值的沼气。因此，这项工作旨在评估源自使用铬盐作为鞣剂的制革厂产生的固体废物的沼气生产，并表征产生沼气的生物质的理化参数和微生物组成。收集废物并在厌氧培养过程的初始和最终时间点评估参数。在150天结束时，产生了26.1 mL g-1 VSS的沼气，含52％的甲烷。观察到的最大量的生物甲烷与古细菌家族的甲烷菌科和细菌类拟杆菌属有关。