AWWA MTC69776

This powerpoint presentation begins by providing a brief overview of the City of Plantation, Florida's search for alternative water sources. After considering several alternative strategies, Plantation decided on indirect potable reuse -aquifer recharge, which required consideration of several important factors including: nutrient control; aquatic organism impact; micro-constituents; recharge modeling; sustainability; public outreach; and, cost. The Plantation pilot plant is presented with information concerning it's membrane bioreactors (MBR) and conventional treatment schemes including: total nitrogen (TN) and total phosphorus (TP) removal ofMBR and reverse osmosis (RO) Pilot Units; and, TN and TP removal ofDeep Bed Filter and RO Pilot Units. Presentation conclusions concerning nutrient removal include:both pilots met stringent TN and TP limits;RO membranes are necessary to meet TP limit; and,membranes alone (UF/RO) with no chemical addition metTN and TP limits. Micro-constituent removal by RO membranes is presented, along with toxicity to aquatic organisms. Presentation summary includes the following: the pilot demonstrated to meet stringent nutrientlimits at different test conditions;RO membranes are necessary for surface waterdischarge due to stringent TP limits; almost all micro-constituents were removed byRO system;RO permeate could be toxic, re-stabilization/re-mineralizationis necessary; and,the observed toxicity to aquatic organisms was likelycaused by chloramines. Other forms of RO pretreatmentshould be evaluated. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

40

File Size:

1 file , 10 MB