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Astrilia Damayanti, Teknik Kimia Unnes and Sarto, - and Siti Syamsiah, - and Wahyudi B. Sediawan, - (2017) The influence of chicken eggshell powder as a buffer on biohydrogen production from rotten orange (Citrus nobilis var. microcarpa) with immobilized mixed culture. In: AIP Conference Proceedings 1855.