Changes

===References===

* Alexandre, O., Boutin, C., Duchène, Ph., Lagrange, C., Lakel, A., Liénard, A. and Orditz, D. (1998). Filières d’épuration adaptées aux petites collectivités. Document technique FNDAE n°22, Cemagref, Lyon, FR.

* Herrera, A. (2006). Rehabilitation of the Imhoff Tank Treatment Plant in Las Vegas, Santa Barbara Honduras, Central America. Master thesis, Department of Civil, Architectural and Environmental Engineering, University of Texas, Austin, US. (Case study providing general information about Imhoff tanks and insights into implementation and operational problems. Recommendations for O&M are provided.)