environmental health project activity report no 17 an evaluation of technical options for improvement the wastewater treatment system at ras kiviter oil shale chemical plant kohtla jarve estonia frank j castaldi ph d pe march 1996 prepared under ehp 228 rc contract hrn 5994 q 00 3037 936 is sponsored by bureau global programs field support and research office nutrition us agency international development washington dc 20523 contents about author 111 executivesummary v 1 background 2 existing 3 future regional waste loadings 9 carbonaceous nitrogen 11 4 spent pile runoff 15 5 treatmentplant 19 basis design considerations process improvements 20 6 other 29 7 conclusions 31 8 references tables performance he biological influence stage on proposed
