John J. Classen

Aspergillus niger absorbs copper and zinc from swine wastewater

Michael Price, John J. Classen, Gary A. Payne · Bioresource Technology · 2001 · 132 citations

Engineering, Biotechnology, Microbiology +8

Nutrient recovery from swine lagoon water by Spirodela punctata

Ben A. Bergmann, John J. Classen, Anne M Stomp et al. · Bioresource Technology · 2002 · 131 citations

Agriculture, Agronomy, Ecology +10

NUTRIENT REMOVAL FROM SWINE LAGOON LIQUID BY LEMNA MINOR 8627

Jay J. Cheng, Louis Landesman, Ben A. Bergmann et al. · Transactions of the ASAE · 2002 · 124 citations

Engineering, Agronomy, Environmental Engineering +17

In vitro selection of duckweed geographical isolates for potential use in swine lagoon effluent renovation

Ben A. Bergmann, Jay J. Cheng, John J. Classen et al. · Bioresource Technology · 2000 · 119 citations

Agriculture, Animal Sciences, Biotechnology +11

An evaluation of commercially available biological filters for recirculating aquaculture systems

Todd Guerdat, Thomas M. Losordo, John J. Classen et al. · Aquacultural Engineering · 2009 · 69 citations

Engineering, Environmental Engineering, Ocean Engineering +12