1. Prof. Dr. Marcia Dezotti is full professor of the Federal University of Rio de Janeiro, Brazil. She obtained her D.Sc. degree from the State University of Campinas in 1992 and a post-doc at North Carolina State University in 2011/2012. She works with advanced oxidation processes, biological treatment of wastewaters and micropollutants, including estrogens. She has more than 80 peer-reviewed papers published in indexed journals. She was advisor of 29 PhD thesis and 41 MSc. She won important awards in Brazil. She has international connections with University of Barcelona, University of Porto, TUDelft, Harvard University, among others. She has HH index of 22 with more than 1,500 citations. 2. Prof. Dr. Geraldo Lippel Sant’Anna Jr. is full professor of the Federal University of Rio de Janeiro, Brazil. He got his D.Sc. degree at the National Institute of Applied Sciences (INSA) of Toulouse, France, in 1980. Retired since 2008 from the university, he still participates in technical and academic projects besides his activity as consulting engineer. He published a book on Biological Wastewater Treatment in 2010, whose second edition was recently published (2013). He has published more than 75 peer-reviewed papers and since 2006 is a member of the Brazilian Academy of Sciences. 3. Prof. Dr. João Paulo Bassin is chemical engineer and got his PhD degree at the Technical University of Delft, Holland, and D.Sc. degree at the Federal University of Rio de Janeiro, Brazil, both in 2012. He works with biofilm processes for biological wastewater treatment and molecular techniques to elucidate microbial diversity of the bioreactors. Nowadays he is Associate Professor at the Chemical Engineering Program (COPPE) at Federal University of Rio de Janeiro.

• Chapter 1 Introduction.- Chapter 2 Membrane Bioreactors MBR's.- 3.Moving bed biofilm reactor MBBR.- Chapter 4 Aerobic Granular sludge technology.- Chapter 5 New process for biological Nitrogen removal.- Chapter 6 Molecular biology techniques applied to the study of microbial diversity of wastewater treatment systems.

1. Prof. Dr. Marcia Dezotti is full professor of the Federal University of Rio de Janeiro, Brazil. She obtained her D.Sc. degree from the State University of Campinas in 1992 and a post-doc at North Carolina State University in 2011/2012. She works with advanced oxidation processes, biological treatment of wastewaters and micropollutants, including estrogens. She has more than 80 peer-reviewed papers published in indexed journals. She was advisor of 29 PhD thesis and 41 MSc. She won important awards in Brazil. She has international connections with University of Barcelona, University of Porto, TUDelft, Harvard University, among others. She has HH index of 22 with more than 1,500 citations. 2. Prof. Dr. Geraldo Lippel Sant’Anna Jr. is full professor of the Federal University of Rio de Janeiro, Brazil. He got his D.Sc. degree at the National Institute of Applied Sciences (INSA) of Toulouse, France, in 1980. Retired since 2008 from the university, he still participates in technical and academic projects besides his activity as consulting engineer. He published a book on Biological Wastewater Treatment in 2010, whose second edition was recently published (2013). He has published more than 75 peer-reviewed papers and since 2006 is a member of the Brazilian Academy of Sciences. 3. Prof. Dr. João Paulo Bassin is chemical engineer and got his PhD degree at the Technical University of Delft, Holland, and D.Sc. degree at the Federal University of Rio de Janeiro, Brazil, both in 2012. He works with biofilm processes for biological wastewater treatment and molecular techniques to elucidate microbial diversity of the bioreactors. Nowadays he is Associate Professor at the Chemical Engineering Program (COPPE) at Federal University of Rio de Janeiro.

• Chapter 1 Introduction.- Chapter 2 Membrane Bioreactors MBR's.- 3.Moving bed biofilm reactor MBBR.- Chapter 4 Aerobic Granular sludge technology.- Chapter 5 New process for biological Nitrogen removal.- Chapter 6 Molecular biology techniques applied to the study of microbial diversity of wastewater treatment systems.

1. Prof. Dr. Marcia Dezotti is full professor of the Federal University of Rio de Janeiro, Brazil. She obtained her D.Sc. degree from the State University of Campinas in 1992 and a post-doc at North Carolina State University in 2011/2012. She works with advanced oxidation processes, biological treatment of wastewaters and micropollutants, including estrogens. She has more than 80 peer-reviewed papers published in indexed journals. She was advisor of 29 PhD thesis and 41 MSc. She won important awards in Brazil. She has international connections with University of Barcelona, University of Porto, TUDelft, Harvard University, among others. She has HH index of 22 with more than 1,500 citations. 2. Prof. Dr. Geraldo Lippel Sant’Anna Jr. is full professor of the Federal University of Rio de Janeiro, Brazil. He got his D.Sc. degree at the National Institute of Applied Sciences (INSA) of Toulouse, France, in 1980. Retired since 2008 from the university, he still participates in technical and academic projects besides his activity as consulting engineer. He published a book on Biological Wastewater Treatment in 2010, whose second edition was recently published (2013). He has published more than 75 peer-reviewed papers and since 2006 is a member of the Brazilian Academy of Sciences. 3. Prof. Dr. João Paulo Bassin is chemical engineer and got his PhD degree at the Technical University of Delft, Holland, and D.Sc. degree at the Federal University of Rio de Janeiro, Brazil, both in 2012. He works with biofilm processes for biological wastewater treatment and molecular techniques to elucidate microbial diversity of the bioreactors. Nowadays he is Associate Professor at the Chemical Engineering Program (COPPE) at Federal University of Rio de Janeiro.

• Chapter 1 Introduction.- Chapter 2 Membrane Bioreactors MBR's.- 3.Moving bed biofilm reactor MBBR.- Chapter 4 Aerobic Granular sludge technology.- Chapter 5 New process for biological Nitrogen removal.- Chapter 6 Molecular biology techniques applied to the study of microbial diversity of wastewater treatment systems.