 In this study, two strains of bacteria were isolated from cardboard industry wastewater and identified as Enterococcus sp and Brevendomonas sp. These strains were then used to produce polyhydroxybutyrate, PHB, type of biodegradable plastic, in high concentrations. This is the first report of using cardboard industry wastewater as a source of cultivation for PHB production. This article was authored by Anish Kumar Ibuwal, Gulab Singh, Neroj Kumar Ugawal and others.