1. Contact Info
  2. Education
  3. Research Area
  4. Teaching
  5. Publications
  6. About Myself
  7. Pictures
  8. CV

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Annalisa Onnis-Hayden, Ph.D.

  • Post-Doctoral Research Associate
  • Department of Civil and Environmental Engineering
  • Northeastern University





Contact Info

431 Snell Engineering Center
360 Huntington Ave.,
Boston, MA 02115
Phone: 617 373 2005
E-mail: aonnis@coe.neu.edu


PhD in Environmental Engineering 2004- University of Cagliari (Italy)

MS in Civil and Environmental Engineering 2000- University of Cagliari (Italy)

MS in Civil and Environmental Engineering 2007- Northeastern University

Research Area

  • Biological Nutrient removal
  • Emerging Contaminants
  • Biosensors for Ecotoxicity assessment
  • Microbial Population Dynamics and Ecology in Natural and Engineered Biological Systems

Check out the Research section to find out more!


Courses at Northeastern:

  • Environmental Biological Processes (CIVG251)
  • Environmental Engineering I(CIVU334)
  • Fluids Mechanics (CIVU331)

Information for the courses are available for students on blackboard.

Other Activities for students

Check the ENVIROPOLIS program!


Onnis-Hayden A., Na G., Gao C., and Gu A.Z. (2010) Temporal Gene Expression Dynamics Reveals Complex Cellular Response to Endocrine Disrupting Compounds. Environmental Microbiology. (in preparation)


N. Gou, Onnis-Hayden, A. and A.Z. Gu (2010) Mechanistic Toxicity Evaluation of Nanomaterials via Prokaryotic Gene Expression Profiling. Environ. Sci. Technol. ( in preparation)


Onnis-Hayden, A., Majed, N. and Gu, A.Z. (2010) Decoupling the Microbial Populations for Phosphorus and Nitrogen Removal in Integrated Fixed-Film Activated Sludge Enhanced Biological Phosphorus Removal (IFAS-EBPR) System. (in submission)


Onnis-Hayden, A., Cherchi, C and Gu, A.Z. (2010) The selection of Organic Sources for Denitrification: Testing and Practical Implication for Their Application in WWTPs. (in submission)


Onnis-Hayden, A., Schramm, A., Dair, D. and Gu, A.Z. (2010) Kinetics And Nitrifying Populations In Nitrogen Removal Processes At A Full-Scale Integrated Fixed-Film Activated Sludge (IFAS) Plant. (in submission)


Cherchi, C., Onnis-Hayden, A., Shawabkeh, I.E. and Gu, A.Z. (2009) Implication of Utilizing Different Carbon Sources For Denitrification in Wastewater Treatments. Water Environ. Res. 81(8), 788-799


Onnis-Hayden, A., H. F. Weng, M. He, S. Hansen, V. Ilyin, K. Lewis & A. Z. Gu (2009) Prokaryotic Real-Time Gene Expression Profiling for Toxicity Assessment. Environmental Science & Technology, 43(12), 4574-458


Hellweger, F. L., Bucci, V., Litman, M. R., Gu, A. Z., Onnis-Hayden, A. (2009). Biphasic Decay Kinetics of Fecal Bacteria in Surface Water: Resistant Fraction or Density Effect? ASCE J. Environ. Engineer., Vol. 134, No. 5, May 2009, pp. 372-376.


A. Onnis-Hayden, G Casadei, P. Beuning, K. Lewis and A.Z. Gu. (2008) Toxicity Assessment of Contaminants via Fluorescent Transcriptional Reporters Response and Gene Expression Profiling in  E. Coli.ASM conference, Boston, June 2008.


P.B. Pedros, A. Onnis-Hayden, C. Tyler (2008)Investigation of nitrification  and nitrogen removal from centrate in a submerged attached growth bioreactor”. Water Environment Research, 80(3), pp. 222-228 .


A. Onnis-Hayden, P.B. Pedros J. Reade(2007) Total nitrogen removal from high-strength ammonia recycle stream using a single Submerged Biofilter”. A. Onnis-Hayden, P.B. Pedros J. Reade. Water Science and Technology 55(8-9), pp.59-65.


A.Z. Gu, P.B. Pedros, A. Kristiansen, A. Onnis-Hayden and A. Schramm (2007) Unconventional nitrogen removal of centrate using single submerged attached growth bioreactor - performance and nitrifying community analysis”. Water Environ Res. 2007 Dec, 79 (13):2510-8


A. Onnis, A. Carucci e G. Cappai (2006) Titration biosensor for estimating the biochemical nitrate demand of municipal and industrial wastes”. Journal of Industrial Microbiology and Biotechnology, 2006 n. 33, pp 243-246.


G. Cappai, A. Carucci, A. Onnis and M. Piredda (2004)Study on the fate of drugs in wastewater treatment plant (WWTP) and their inhibition effects on nitrification. Proc. of the 4th World Water Congress, Marrakech, September 2004.


G. Cappai, A. Carucci e A. Onnis (2004) Use of Industrial Wastewaters for the Optimization and Control of Nitrogen Removal Processes”. Water Science and Technology 50(6), pp.17-24.


A. Carucci, G. Cappai, A. Muntoni, A. Onnis (2002)Use of red mud from Bayer process for nitrogen and phosphorus removal.” Proc. of the “VI SIBESA”, Symposium Italo-Brasilian of Sanitary and Environmental Engineering, Vittoria, Brasil, 1-5 September 2002.


Ph.D Thesis:“Denitrification process monitoring: use of titrimetric biosensors, characterization methods and application in sequencing batch reactors”.

MS thesis: "Nitrogen Biological Treatment of a high-strength wastewater in a Submerged Attached Growth Bioreactor"

MS thesis:“Experimental study and modeling of nitrogen removal process in a biofilm reactor”

About Myself

Here you will find information about my research and teaching... but you must know that...besides working with wastewater, I love:

  • My husband and my son Thomas!!
  • My beautiful land..SARDEGNA!
  • Cooking and eating (especially italian... I love PiZZA!!)
  • My family and my friends from all around the world!
  • Traveling.. who doesn't?


My husband Chris and I

At the Deer Island Lab

Sardegna.. my Home!

054 Snell Engineering Center, 360 Huntington Ave., Boston, Massachusetts 02115. (Tel) 617-373-3786