Nikhil Krishnan

TL;DR: In this paper, the authors developed a library of typical gate-to-gate materials and energy requirements, as well as emissions associated with a complete set of fabrication process models used in manufacturing a modern microprocessor, and evaluated upstream energy requirements associated with chemicals and materials using both existing process life cycle assessment (LCA) databases and an economic input output (EIO) model.

TL;DR: A metric called the Resource Conservation Efficiency (RCE) is developed that can be used to rapidly and effectively benchmark (on a screening level) the ecological sustainability of waste management practices across multiple locations and is demonstrated to be an effective proxy by comparing RCE results with existing LCA inventory and impact assessment methods.

TL;DR: Health risk assessments for landfill disposal versus WTE treatment options for the management of New York City's MSW indicate that the individual cancer risks for both options would be considered generally acceptable, although the risk from landfilling is approximately 5 times greater than from W TE treatment.

TL;DR: In this paper, the authors explore secondary materialization in semiconductor manufacturing by characterizing energy use trends for three cases: cleanrooms, producing ultrapure water (UPW), and purifying elemental gases.

TL;DR: An extended SE calculation methodology is developed and applied to compare carbon flows through two different systems for municipal solid waste management (landfills) and waste-to-energy (WTE) facilities, indicating that while landfills perform better on a cursory analysis, they are roughly equal to WTE when carbon flows related to energy generation are accounted for, and underperform when considering global warming potential.