The present work aims to review the recycling process via analyzing the recycling of thermoplastic, thermoset polymers, biopolymers, and their complex composite systems, such as fiber-reinforced polymers and nanocomposites. Many worldwide events are focusing on the global technologies in plastics, bioplastic production, the recycling industry, and waste management where the goal is to turn plastic waste into a trade opportunity among the industrialists and manufacturers. Due to so-called global warming, there is an urgent need to find solutions to help the Earth and move towards a green future. Today’s world is at the point where almost everyone realizes the usefulness of going green. Furthermore, results showed that displacements at the geogrid end decreased with increasing the number of bottles. In addition, it was proved that the appropriate distance between the transverse bottles attached to the geogrid was four times as large as the bottle diameter (D) under different vertical stresses.

The results showed that the GG-B system increased the pullout force by more than about 69% compared to geogrid alone.

The pullout tests results have shown that sand-filled recycled bottles can provide reasonable strength in the third dimension of the reinforcement and can increase the reinforcement resistance against the pullout force. The purpose of this study is to examine the effect of using recycled bottles as transverse members on geogrid by large-scale pullout tests the new system is called Geogrid-Bottle (GG-B). Accordingly, finding solutions to improve and strengthen the parameters of the soil–geogrid interaction is demanding. In earthen structures reinforced with geosynthetics, the interaction between soil and geogrid is an important criterion for designing and controlling stability. In recent years, the application of geogrid in reinforced soil structures, including mechanically stabilized earth walls, has remarkably increased. These three case studies along with the mentioned difficulties and suggestions in order to overcome them are presented here, with the aim of offering insights for future studies on the management of plastic materials. Emphasis is given on three case studies where there are difficulties as regards the recycling of the plastic part: polymeric blends, since the existence of mixed plastic wastes may be challenging for their recycling plastics originating in multilayer packaging, since the multilayer packaging consists of various materials, including plastics, paper, and metals that may be an obstacle for the recycling of the plastic part and brominated flame-retarded plastics from waste electric and electronic equipment (WEEE), since in this case safe handling is required in order to avoid environmental contamination and a pretreatment step before recycling may be of paramount importance. Extra attention is paid to chemical recycling and especially, pyrolysis (thermal and catalytic), which is an environmentally friendly method that results in the formation of value-added products. Firstly, there are presented all methods used for plastic recycling, along with the advantages and disadvantages of each method. This chapter presents an overview of current trends in plastic recycling and focuses on specific topics of interest.

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