Impact of desalination on the coastal environment? on biodiversity?
Please send me any articles on desalination of sea water on Mediterranean coast.
Dear Kerkouf
Once you received a reply or someone send any publication, can you let me know, please.
I am interested in this subject too.
Laith A. Jawad
Auckland
new Zealand
Hey Ahmed
You ask a very interesting question. In the attached paper we talk about this source as potentially important for coastal waters, but I must say that I do not read any paper on this subject up to now.
Different type of sea water desalination - different environmental effrects. I had personal experiences with sea water desalination since I were responsible engineer for a desalination plant in Lybia: Marsa El Brega. Company: Lifeco (Lybian-Norvegian Fertilizer Company).
it was a reverse osmotic desalination plant:
1. tanks, sandfilters, nanofiltration and sea water RO.
2. Environmental effect: feed conductivity: 55-60 millisiemens/cm, rejection: 60-65%, permeate: 400-500 microsiemens/cm therefore the bad environmental effect the 60% overconcentrated concentrate 95-99 millisiemens/cm which is 95 000 millisiemens/cm concatnate goes back to the sea. This plant concetnrated 400 m3/h seawater and the drained back 160 m3/h 95 000 microsiemens/cm water into the Mediterranean sea.
2. Environmental effect of biocides. For membrantechnology is esential the microbiological control otherwise the membrane will be blocked by bacteria and algae. The usual method is the biocide shockdosage which means approx. 20 l/hour/110 m3 2x per week. Actually the biocid concentration is not measured in the concentrate. However the most dangarous when the biocide storage and handling is improper. Biomate series is a frequent biocides which they use.
Hello Dear Pr Kerfouf.
for me the best way to study the impact of desalination of sea water on coastal fauna, is to make inventor of euryhaline and stenohaline fauna , and you have to make some statistical treatments such as abundance and dominance and an AFC or ACP. to observe the rate of change of fauna over the poucentage salinity.
it is my idea, good luck for us.
Desalination returns typically half the amount of sea water intake as brine with about double the salt concentration. Here desalination plants are purposely not built in bays, brine outlets constructed beyond the shore line and designed for optimal dilution. Significant impacts on marine life have not been reported to the best of my knowledge. My guess as a practitioner is that the activities using the costly desalinated water present the larger environmental risks.
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