9
Figure 51: an oven set to 40°C................................................................................................ 44
Figure 52: dry spirulina biomass ............................................................................................ 45
Figure 53: making spirulina powder ....................................................................................... 45
Figure 54: spirulina powder .................................................................................................... 45
Figure 55: the 1% glycerol solution preparation..................................................................... 46
Figure 56: gelatin .................................................................................................................... 47
Figure 57: adding the ingredients ........................................................................................... 47
Figure 58: preparing the bioplastic ......................................................................................... 47
Figure 59: pouring the mixture in a silicone mold .................................................................. 47
Figure 60: bioplastic sample after drying ............................................................................... 48
Figure 61: preparing another bioplastic .................................................................................. 48
Figure 62: bioplastic buried in the soil ................................................................................... 49
Figure 63: initial length ........................................................................................................... 50
Figure 64: final length ............................................................................................................. 50
Figure 65: initial seeding ........................................................................................................ 52
Figure 66: microscopic observation throughout several days ×40 ......................................... 53
Figure 67: microscopic observation of spirulina filament on the 10th day ×100 ................... 53
Figure 68: microscopic observations of PHB crystals ............................................................ 54