NOVELTY - Process comprises: anaerobic biodegradation of one or more organic waste streams to produce biogas methane, consuming the biodegradable portion of the waste stream, and producing a refractory organic residue; using aerobic methanotrophic bacteria to convert biogas methane into a bioplastic resin; cell separation and purification of the bioplastic resin; using renewable energy to meet on-site energy demands for synthesis and recovery of the bioplastic resin; and anaerobic biodegradation of bioproducts that contain the bioplastic resin at end-of-life so as to regenerate the biogas feedstock.    USE - The process is useful for producing bioplastic resin (thermoplastic), which is useful for fabricating a biodegradable biocomposite and biodegradable foams (all claimed).    ADVANTAGE - The process can be implemented off the power grid with no dependence upon agricultural products for feedstock. The process allows decreasing cost and reducing organic waste entering landfills. The process provides a sustainable biopolymer production, i.e. environmentally and economic beneficial when compared to conventional methods that rely upon petrochemical feedstock or feedstock that is cultivated, harvested, and processed to produce building blocks for biopolymer production.    DETAILED DESCRIPTION - Process comprises: (a) anaerobic biodegradation of one or more organic waste streams to produce biogas methane, consuming the biodegradable portion of the waste stream, and producing a refractory organic residue; (b) using aerobic methanotrophic bacteria to convert biogas methane into a bioplastic resin; (c) cell separation (e.g. extraction with chemicals or impingement/sonification without chemicals) and purification of the bioplastic resin; (d) using renewable energy to meet on-site energy demands for synthesis and recovery of the bioplastic resin; and (e) anaerobic biodegradation of bioproducts that contain the bioplastic resin at end-of-life so as to regenerate the biogas feedstock.