production of biogas for the bioplastic resin phb and for biocomposites made with different resins samples of the bioplastic phb nodax brand were incubated anaerobically in microcosms containing seed material from an anaerobic digester at a wastewater treatment plant as shown in fig2 phb degraded rapidly at 37 u00b0 c biocomposite specimens were then produced containing phb cellulose acetate or soybean oil based matrix material as shown in fig3 the phb based biocomposites biodegraded produced biogas at a rate 8 25 times faster than their cellulose acetate and soybean oil based counterparts production of the bioplastic phb from u201c dirty u201d landfill biogas and anaerobic digester biogas two experiments were conducted to determine the effect of biogas on the observed rate of growth and phb production in a type ii methanotroph in the first experiment 9 serum bottles containing 30 ml of sterilized media were inoculated with an exponential phase culture of methylocystus parvus obbp of these bottles 3 were inoculated with 40 ml oxygen 40 ml methane and 40 ml co2 to simulate uncontaminated biogas 3 bottles were inoculated with 40 ml oxygen and 80 ml unfiltered landfill gas collected from the palo alto landfill while the remaining 3 were inoculated with 40 ml oxygen and 80 ml unfiltered anaerobic digester gas collected from the san jose wastewater treatment plant all nine bottles were.