**Author details**


<sup>© 2020</sup> The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

*Downflow Hanging Sponge System: A Self-Sustaining Option for Wastewater Treatment DOI: http://dx.doi.org/10.5772/intechopen.94287*
