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Full Title

IWA-10748-Poster_Vallvidrera WWTP_Optimization of a Membrane Biological Reactor

Event

IWA Regional Conference on Membrane Technology 2012

Authors and Affiliations

R. Estany*, P. Aguiló**, R. Brown***

Vallvidrera and Sant Feliu WWTP.

Metropolitan Organization of Water and Sanitation (EMSSA),

Sant Feliu del Llobregat 08980,

rut_estany@hotmail.com
;

restany@emssa.com ;

paguiló@emssa.comrbrown@emssa.com

 

Abstract

The original Vallvidrera WWTP, built in 1974, is located in a natural fragile and very sensitive environment. Its effluent discharges to a stream, in the Collserola Mountain Range, declared Natural Park by the Government in 2010 (Decree (RD) 146/2010, 19th of October). The protection of this stream is essential; since it is the only permanent water course in the mountain range. Due to the legislation changes and the increased population connected to the plant a completely new installation was projected. Due to lack of space a compact installation was needed, and as such Membrane Biological Reactor (MBR) technology was chosen.

The MBR was commissioned in 2009 with a treatment capacity of 1.100m3/day (290.600 US gallons per day) designed to produce a high quality effluent. The required limits for the effluent from the MBR plant are SS<8mg/l, BOD5<8mg/l, NT<15mgN/l and Turbidity <2 NTU

The main advantages of MBR technology are the production of consistently high quality effluent, which can even be reused according to RD1620/2007, and the smaller footprint required. The main disadvantages are the increased complexity of their management, operation and maintenance, compared to a conventional activated sludge treatment, with its increased costs; the necessity of a stringent pre-treatment due to the fragility of the membranes; and the increase in power consumption. This work is based on the experience managing and operating a MBR plant in a sensible area. During three years of operation, several changes were made to improve the process and energy efficiency, many of them motivated by the problems encountered during these years.

Content

FilenameSizeType
IWA-10748-PosterVallvidreraWWTP.pdf 453.82 Kb application/pdf
Created by RUT ESTANY on 2013/02/25 16:18

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