Lignin and Cellulose Content of Fermented Rice Straw with Aspergillus niger (van Tieghem) and Trichoderma mutan AA1Sri Sukaryani, Engkus Ainul Yakin, Yos Wahyu Harinta, Zane Vincēviča–Gaile and Endang Dwi PurbajantiE3S Web Conf., 226 (2021) 00043DOI: https://doi.org/10.1051/e3sconf/202122600043