||Continuous-Flow Mini-Diluter System for Toxicity Testing.
Benoit, Duane A. ;
Mattson, Vince R. ;
Olson, Diane L. ;
||Environmental Research Lab.-Duluth, MN.
Test equipment ;
Hazardous materials ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
A space saving portable mini-diluter exposure system for testing early life stages of fish and invertebrates has been developed and successfully used both in the laboratory and on-site with single chemicals and with complex effluents. This gravity-operated system can also be installed in a compact, vented enclosure to permit safe testing of hazardous volatile chemicals. The mini-diluter test system has several additional advantages over other widely used dosing systems in that it (1) uses small volumes of complex effluents and/or single chemicals which reduces the problem of removing hazardous material from the test system's waste water; (2) works well with waste containing suspended solids; and (3) can maintain normal operation for up to 10 h if the effluent headbox supply pump fails and up to 4 h if the diluent water headbox supply pump fails.