There are {HEAD ~ waste products} such as calcium chloride and {TAIL ~ magnesium chloride} that can be diluted with the pure water produced from the complex membrane and heat exchanger system and returned back to the sea without harming the marine environment 
such as
There are { HEAD ~ waste products } such as calcium chloride and { TAIL ~ magnesium chloride } that can be diluted with the pure water produced from the complex membrane and heat exchanger system and returned back to the sea without harming the marine environment
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH