Community College Leader Bulletin, Fall 2008, Vol. 1, Issue 3

Newsletter produced by the Iowa Department of Education, Community College unit. This report has information about staff, grants, statistical data, requirements and more.

Community College Leader Bulletin, Spring 2009, Vol. 2, Issue 2

Newsletter produced by the Iowa Department of Education, Community College unit. This report has information about staff, grants, statistical data, requirements and more.

Community College Leader Bulletin, Summer 2009, Vol. 2, Issue 3

Newsletter produced by the Iowa Department of Education, Community College unit. This report has information about staff, grants, statistical data, requirements and more.

Community College Leader Bulletin, Fall 2014, Vol. 4, Issue 4

Newsletter produced by the Iowa Department of Education, Community College unit. This report has information about staff, grants, statistical data, requirements and more.

Community College Leader Bulletin, Winter 2013, Vol. 3, Issue 1

Newsletter produced by the Iowa Department of Education, Community College unit. This report has information about staff, grants, statistical data, requirements and more.

Community College Leader Bulletin, Summer 2014, Vol. 3, Issue 3

Newsletter produced by the Iowa Department of Education, Community College unit. This report has information about staff, grants, statistical data, requirements and more.

Community College Leader Bulletin, Winter 2015, Vol. 5, Issue 1

Newsletter produced by the Iowa Department of Education, Community College unit. This report has information about staff, grants, statistical data, requirements and more.

2007-2008 Academic Year Iowa Community Colleges Tuition and Fees Report, July 2007

This document shows the tuition and fees charged by the 15 community colleges. It includes comparisons to the regents institutions and to national data.

2004-2005 Academic Year Iowa Community Colleges Tuition and Fees Report, November 2004

This document shows the tuition and fees charged by the 15 community colleges. It includes comparisons to the regents institutions and to national data.

2006-2007 Academic Year Iowa Community Colleges Tuition and Fees Report, July 2006

This document shows the tuition and fees charged by the 15 community colleges. It includes comparisons to the regents institutions and to national data.

Iowa Community Colleges Tuition and Fees Report 2009, August 2008

This document shows the tuition and fees charged by the 15 community colleges. It includes comparisons to the regents institutions and to national data.

Iowa Community Colleges High School Enrollment Report, February 2006

Community Colleges of Iowa transmit fiscal year enrollment data to the Department of Education. All data included in this report, except where noted, are taken from the Management Information System (MIS) electronic data files and are confirmed by the community college.

Third Annual Iowa Community Colleges High School Enrollment Report, January 2007

Community Colleges of Iowa transmit fiscal year enrollment data to the Department of Education. All data included in this report, except where noted, are taken from the Management Information System (MIS) electronic data files and are confirmed by the community college.

Iowa Community Colleges High School Enrollment Report, July 2008

Community Colleges of Iowa transmit fiscal year enrollment data to the Department of Education. All data included in this report, except where noted, are taken from the Management Information System (MIS) electronic data files and are confirmed by the community college.

Sequentially aerated membrane biofilm reactors for autotrophic nitrogen removal: microbial community composition and dynamics

Membrane-aerated biofilm reactors performing autotrophic nitrogen removal can be successfully applied to treat concentrated nitrogen streams. However, their process performance is seriously hampered by the growth of nitrite oxidizing bacteria (NOB). In this work we document how sequential aeration can bring the rapid and long-term suppression of NOB and the onset of the activity of anaerobic ammonium oxidizing bacteria (AnAOB). Real-time quantitative polymerase chain reaction analyses confirmed that such shift in performance was mirrored by a change in population densities, with a very drastic reduction of the NOB Nitrospira and Nitrobacter and a 10-fold increase in AnAOB numbers. The study of biofilm sections with relevant 16S rRNA fluorescent probes revealed strongly stratified biofilm structures fostering aerobic ammonium oxidizing bacteria (AOB) in biofilm areas close to the membrane surface (rich in oxygen) and AnAOB in regions neighbouring the liquid phase. Both communities were separated by a transition region potentially populated by denitrifying heterotrophic bacteria. AOB and AnAOB bacterial groups were more abundant and diverse than NOB, and dominated by the r-strategists Nitrosomonas europaea and Ca. Brocadia anammoxidans, respectively. Taken together, the present work presents tools to better engineer, monitor and control the microbial communities that support robust, sustainable and efficient nitrogen removal