Resilience evaluation of active and passive redundancy using carbon-hydrogen-oxygen symbiosis network – An integrated and post-design analysis

Carbon-hydrogen-oxygen symbiosis network, which is an eco-industrial park design method, along with atomic targeting provides a different avenue to approach effluents whereby effluents from industries could be gathered and redistributed to the respective interceptors to produce products. Resilience of an eco-industrial park is of particular interest due to the fluctuating economy whereby commitment of participants would be into question due to downturn in the economy. Resilience index provides a metric to evaluate the resilience of an eco-industrial park by assigning a value between 0 and 1. Resilience of an eco-industrial park could be improved by either having active redundancy such as extra process lines or oversizing the process lines. However, passive redundancy such as storage and buffer tanks also play a role in improving resilience of an eco-industrial park. This work aims to develop a method for resilience evaluation of a carbon-hydrogen-oxygen symbiosis network as well as comparing active and passive redundancy in resilience improvement of an eco-industrial park. Besides, the resilience metric is also incorporated into the carbon-hydrogen-oxygen symbiosis network model to compare the differences between post-design and integrated approach. The results obtained showed that while incorporation of both active and passive redundancy on all species would maximise the resilience index, partial combination of both could achieve a similar result. Besides, post-design and integrated approach would yield similar resilience index when interceptors of carbon-hydrogen-oxygen symbiosis network is limited. When more degrees of freedom are given to the number of interceptors, the results of post-design would not differ much. On the other hand, the results from integrated approach would select extra interceptors. Primarily, species which have not been compensated in the network would be selected to allow for redirection of flow when disruption occurs. • The adapted resilience index method is conformed to a carbon-hydrogen-oxygen symbiosis network. • Active and passive resilience contribute to the resilience of an eco-industrial park. • The method is modified to account for active and passive resilience. • Differences on CHOSYN in post-design and integrated approach for resilience evaluation. • The resilience index value in combination with other values could serve as a decision-making tool.