Recycled Plastic Engineer

The engineer oversees solvolysis, glycolysis, enzymatic digestion, hydrothermal liquefaction, and catalytic pyrolysis systems designed to process mixed and contaminated plastics such as polyethylene terephthalate PET, multilayer flexible packaging, and mixed polyolefins. Conforming to standards established by the Association of Plastic Recyclers APR and the American Chemical Society Green Chemistry Institute ACS GCI, the engineer formulates heterogeneous catalysts and selects green solvents to cleave ester, amide, and carbon carbon bonds under controlled temperatures and pressures. They model reaction kinetics, mass transport in viscous melts, and energy recovery networks to ensure the circular depolymerization process operates with a lower carbon footprint than fossil based petrochemical extraction.

While automated process control consoles and kinetic simulation algorithms predict monomer conversion percentages and heat exchanger fouling rates, post consumer plastic feeds introduce unpredictable contaminants including heavy metal colorants, brominated flame retardants, polyvinyl chloride PVC residues, and biological soils. These impurities rapidly poison recycling catalysts, generate corrosive hydrochloric acid vapors, and trigger unplanned process shutoffs. The depolymerization process engineer designs robust purification trains, including vacuum thin film evaporators, crystallizers, and membrane separators, making critical operational calls that ensure circular plastics achieve true virgin resin purity.

The day begins at eight in the morning at the advanced recycling demonstration facility, where a continuous glycolysis reactor is depolymerizing two tons per day of post consumer colored polyester textile waste into pure bis hydroxyethyl terephthalate BHET monomer. The engineer checks the supervisory control panel, reviewing temperatures across the four jacketed reactor zones which are maintained at two hundred and ten degrees Celsius using hot thermal oil. They note that the recirculation gear pump motor current is holding steady, confirming smooth liquefaction without undissolved fabric clumps. In the analytical lab, the engineer inspects the HPLC chromatogram of the clarified

monomer stream exiting the downstream decolorization carbon beds. They verify that the residual dye content is below two parts per million, ensuring that the recovered BHET crystals will yield clear, optical grade virgin polymer. However, the online sensor on the solvent recovery condenser shows a slight rise in ethylene glycol acidity, indicating trace polyvinyl chloride contamination in the morning feed batch that produced minute traces of hydrochloric acid. Stepping into the plant, the engineer inspects the caustic neutralizer dosing system, increasing the sodium carbonate buffer rate to protect the stainless.

A Recycled Plastic Circular Depolymerization Process Engineer researches, designs, optimizes, and scales up advanced chemical recycling plants that break down end of life post consumer plastics into virgin quality monomer building blocks, chemical intermediates, and synthetic feedstocks. Operating across commercial circular economy hubs, chemical recycling pilot facilities, and sustainable polymer manufacturing complexes, the engineer overcomes the thermodynamic and molecular contamination bottlenecks that prevent mechanical recycling from producing food grade or high performance materials.

Core responsibilities include design and operate continuous chemical recycling reactors for the solvolysis, glycolysis, and catalytic depolymerization of waste plastics., operational coordination, and ensuring strict adherence to Kenyan statutory frameworks and quality standards.

Key organizations hiring for this role include Kenya Medical Research Institute KEMRI, Dawa Life Sciences, Cosmos Pharmaceuticals Limited, Bio Foods Kenya, alongside expanding opportunities in Nairobi, Mombasa, Kisumu, and regional infrastructure projects.

Recycled Plastic Engineer Specialist, Senior Recycled Plastic Engineer, Recycled Plastic Engineer Lead, Recycled Plastic Engineer Consultant

While automated process control consoles and kinetic simulation algorithms predict monomer conversion percentages and heat exchanger fouling rates, post consumer plastic feeds introduce unpredictable contaminants including heavy metal colorants, brominated flame retardants, polyvinyl chloride PVC residues, and biological soils. These impurities rapidly poison recycling catalysts, generate corrosive hydrochloric acid vapors, and trigger unplanned process shutoffs. The depolymerization process engineer designs robust purification trains, including vacuum thin film evaporators, crystallizers, and membrane separators, making critical operational calls that ensure circular plastics achieve true virgin resin purity. Employment opportunities concentrate across major industrial, commercial, and financial hubs including Nairobi, Mombasa, Kisumu, Nakuru, and Eldoret, alongside specialized regional project sites.