Abstract
Amsterdam Water Supply produces 70 million m 3 drinking water per annum in its Leiduin plant and is considering increasing the plant capacity to 83 million m 3 per annum. The existing plant is a conventional surface water treatment plant. For capacity expansion, two alternative treatment schemes, each using reverse osmosis, are being considered. In these considerations, environmental impact plays an important role. Environmental impact of the plant was assessed with life cycle analysis. The total impact for annual production from the existing and the two future alternative schemes are 2.89E+04, 3.65E+04 and 3.44E+04 eco-points respectively. The significant impact contributors are the use of conventional energy, softening and the granular activated carbon process. Impact reduction up to 73% may be achieved by the use of 100% green energy, the use of an alternative chemical [Na 2 CO 3 in place of NaOH] in the softening process and doubling the carbon run time.
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