Process greenness’ scoring

Solvent and Process Greenness Scoring and Selection Tools... 

As an example, when determining a solvent s environmental waste score, data are obtained to first score the solvent based on its environmental performance or impacts when it is incinerated, recycled, or undergoes biotreatment. A fourth score is calculated based on the solvent s VOC emissions when handled or used in a process. Some of the data used to determine the basic impact scores include solvent physical property data, waste generation estimations, and ease of operability (in the case of treatment methods). The geometric mean of the four impact area scores yields the environmental waste score. The scores are calculated on a l-to-4 scale and subsequently normalized on a 1-to-lO scale. 10 represents the greenest score and 1 is the least green score for this method [9]. 

To demonstrate the ability of the Solvent Greenness Scoring Index to measure the greenness of a process, consider a hypothetical waste stream which contains 25 kg of four different solvents methanol, DMF, THF, and DGM. First the metric... 

Figure 13.3 (a) Plot of selectivity score versus promiscuity score applied to MDDR. Red dots are marketed drugs. Marketed drugs clearly cluster when compared to other compounds in different drug discovery phases (green dots), (b) The predicted selectivity of compounds in different phases of the drug discovery process. 

This example shows the pros and cons of grouping and averaging scores and weighted hazard rankings. Averaging overall scores makes the process seem fairly green, but this may be masking particular hazards associated with specific... 

One of the principal elements of Green Zia that will be the focus of this paper is the third-party assessment and feedback report process. Like our Baldrige brethren at both the national level and at the state Quality Award Program level, Green Zia employs a number of volunteers to read applications that are submitted to our state Environment Department, provide nonprescriptive feedback on strengths and opportunities for improvement, determine a score for the application based on a 1000-point scale, and possibly conduct a site visit to verify/clarify the application. This paper will describe all aspects of the third-party examination process and will provide some personal insight as to the strengths and opportunities for improvement of our own process. 

The green tape can be stored until required for further processing, 1e stamping, scoring and fixing to produce dense flat sheets of ceramic. 

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