Corrigendum

Nur Rokhati, Heru Susanto, Kristinah Haryani, Bambang Pramudono "Enhanced Enzymatic Hydrolysis of Chitosan by Surfactant Addition", 62(3), pp. 286-291, 2018. https://doi.org/10.3311/PPch.11142When the above article was first published online Eq. (2) was incorrect. This has now been corrected in the online version

Corrigendum

Krisztina Várnai, László Petri, Lajos Nagy "Prospective Evaluation of Spent Sulfuric Acid Recovery by Process Simulation", 65(2), pp. 243–250, 2021. (in this issue)https://doi.org/10.3311/PPch.15679When the above article was first published online Fig. 8 was incorrect. This has now been corrected in the online version. The correct version of Fig. 8 is published here

Corrigendum

Krisztina Várnai, László Petri, Lajos Nagy "Prospective Evaluation of Spent Sulfuric Acid Recovery by Process Simulation", 65(2), pp. 243–250, 2021. (in this issue)https://doi.org/10.3311/PPch.15679When the above article was first published online Fig. 8 was incorrect. This has now been corrected in the online version. The correct version of Fig. 8 is published here.</jats:p