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The International Organization for Standardization (ISO) 14001 Environmental Management System (EMS) standard provides a guideline for an organisation to perform a continuous improvement to their environmental performance. In light of continued concerns over global environmental impacts and climate change, the ISO 14001 standard serves to demonstrate organisational commitment to sustainable production processes. The objective of our paper is to determine the thematic and geographical trends of published EMS research with a view of developing a coordinated and holistic research framework which can be applied to facilitate the adoption of ISO 14001 in developing and developed regions of the world. Drawn from a portfolio of 509 articles from the Web of Science database, this study investigates the global trends of ISO 14001 EMS research between 2000 and 2016. The results show a considerable increase in scientific publications; from 10 articles in 2000 to 58 articles in 2016. Three themes were identified from the analysis: socio-ecological (60 %), economic implications (25 %), and environmental aspects (15 %). In addition to a concentration of articles towards the socioecological theme of research, it is found that the majority of the published research derived from Europe (40 %), North America (21 %), and China (11 %). Articles authored by researchers from developing countries were poorly represented in the findings. In order to address the thematic and global imbalance of EMS research, a research framework is proposed that promotes multi-stakeholders inclusion (e.g. industry, academics, government, etc.), cross-ACCEPTED MANUSCRIPT country research collaboration and a focus on demand-driven approach for problem solving and policy-making.

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This study identifies the potential greenhouse gas (GHG) reductions, which can be achieved by optimizing the use of residues in the life cycle of palm oil derived biodiesel. This is done through compilation of data on existing and prospective treatment technologies as well as practical experiments on methane potentials from empty fruit bunches. Methane capture from the anaerobic digestion of palm oil mill effluent was found to result in the highest GHG reductions. Among the solid residues, energy extraction from shells was found to constitute the biggest GHG savings per ton of residue, whereas energy extraction from empty fruit bunches was found to be the most significant in the biodiesel production life cycle. All the studied waste treatment technologies performed significantly better than the conventional practices and with dedicated efforts of optimized use in the palm oil industry, the production of palm oil derived biodiesel can be almost carbon neutral.