David A. Vaccari

Associate Professor and
Director of the Dept. of Civil, Environmental and Ocean Engineering
Stevens Institute of Technology
Hoboken, NJ 07030






Click on 'MPR' to learn about multivariate polynomial regression, a powerful empirical modeling technique for nonlinear data or time-series analysis which can outperform artificial neural networks.

In a paper published in the June 2009 issue of Scientific American magazine, I raised the alarm about the depletion in U.S. and global high-grade phosphorus resources: “The U.S. is the world’s largest producer and exporter of phosphorus, at 23 percent of the total, but 80 percent of that amount comes from a single source: pit mines near Tampa, Fla., which may not last more than a few decades. Meanwhile nearly 40 percent of global reserves are in a single country, Morocco, sometimes referred to as the “Saudi Arabia of phosphorus.” Although Morocco is a stable, friendly nation, the imbalance makes phosphorus a geostrategic ticking time bomb.” Furthermore, global supplies of high-grade resources may last less than a century.

To download a file with additional sources of information, references, and links, click HERE.

In 2005 I co-authored a book with Jim Alleman of Iowa State and Peter Strom of Rutgers, entitled "Environmental Biology for Engineers and Scientists". Click on the title to view the outline. You can also “look inside” on Amazon.com.

Click on 'ESIM' to download software for control and simulation of activated sludge plants. Four programs can be downloaded, including a full dynamic activated sludge simulator, programs for computing the Dynamic Sludge Age (DSA) parameter, a program to compute solids distribution and waste rate in step-feed processes, and a program to simulate gravity thickening.

Click on 'METALS' to download spreadsheet programs to compute aqueous solubility of lead, copper, iron, calcium and magnesium, as they depend upon pH, alkalinity, and TDS.

Go here to find the Stevens Institute of Technology home page.

David A. Vaccari