The macronutrients ratio present in tannery wastes is normally not ideal for anaerobic digestion (AD). In most cases, it is necessary to add nutrients to obtain a more balanced AD process and to ensure favorable conditions for the growth and metabolism of microorganisms. The aim of this study was to verify the influence of the components of nutrient solution added to AD of tannery wastes with regard to the energy and waste treatment efficiency and to the cost-saving analysis. The findings provides better understanding of the nutritional requirement of co-AD of tannery wastes, with the highest value of biogas production of 30.14 mL/g of added VSS, besides representing a step in the search for a more balanced, efficient and viable process. The results obtained proving the competitiveness of co-AD of tannery wastes instead of disposing it in landfills (saving off about 71% in terms of electric consumption).

中文翻译：

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用于制革厂废物厌氧消化的营养平衡：能源效率，废物处理和节省成本。

制革厂废物中存在的大量营养素比例通常对于厌氧消化（AD）而言并不理想。在大多数情况下，有必要添加营养以获得更平衡的AD过程并确保有利于微生物生长和代谢的条件。这项研究的目的是验证养分溶液添加到制革厂废物AD中对能源和废物处理效率以及节约成本分析的影响。研究结果使人们更好地了解了制革厂废料的共AD的营养需求，沼气生产的最高价值为添加的VSS 30.14 mL / g，这代表了寻求更平衡，高效和可行的过程的一步。