{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T01:10:22Z","timestamp":1775265022255,"version":"3.50.1"},"reference-count":47,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2010,4,28]],"date-time":"2010-04-28T00:00:00Z","timestamp":1272412800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biotech &amp; Bioengineering"],"published-print":{"date-parts":[[2010,10,15]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A model was developed to describe toxicity from high concentrations of chlorinated aliphatic hydrocarbons (CAHs) on reductively dechlorinating cultures under batch\u2010growth conditions. A reductively dechlorinating anaerobic Evanite subculture (EV\u2010cDCE) was fed trichloroethene (TCE) and excess electron donor to accumulate <jats:italic>cis<\/jats:italic>\u20101,2\u2010dichloroethene (cDCE) in batch\u2010fed reactors. A second Point Mugu (PM) culture was also studied in the cDCE accumulating batch\u2010fed experiment, as well as in a time\u2010 and concentration\u2010dependent cDCE exposure experiment. Both cultures accumulated cDCE to concentrations ranging from 9,000 to 12,000\u2009\u00b5M before cDCE production from TCE ceased. Exposure to approximately 3,000 and 6,000\u2009\u00b5M cDCE concentrations for 5 days during continuous TCE dechlorination exhibited greater loss in activity proportional to both time and concentration of exposure than simple endogenous decay. Various inhibition models were analyzed for the two cultures, including the previously proposed Haldane inhibition model and a maximum threshold inhibition model, but neither adequately fit all experimental observations. A concentration\u2010dependent toxicity model is proposed, which simulated all the experimental observations well. The toxicity model incorporates CAH toxicity terms that directly increase the cell decay coefficient in proportion with CAH concentrations. We also consider previously proposed models relating toxicity to partitioning in the cell wall (<jats:italic>K<\/jats:italic><jats:sub>M\/B<\/jats:sub>), proportional to octanol\u2013water partitioning (<jats:italic>K<\/jats:italic><jats:sub>OW<\/jats:sub>) coefficients. A reanalysis of previously reported modeling of batch tests using the Haldane model of Yu and Semprini, could be fit equally well using the toxicity model presented here, combined with toxicity proportioned to cell wall partitioning. A companion paper extends the experimental analysis and our modeling approach to a completely mixed reactor and a fixed film reactor. Biotechnol. Bioeng. 2010;107: 529\u2013539. \u00a9 2010 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/bit.22776","type":"journal-article","created":{"date-parts":[[2010,4,29]],"date-time":"2010-04-29T11:19:35Z","timestamp":1272539975000},"page":"529-539","source":"Crossref","is-referenced-by-count":26,"title":["Trichloroethene and <i>cis<\/i>\u20101,2\u2010dichloroethene concentration\u2010dependent toxicity model simulates anaerobic dechlorination at high concentrations: I. batch\u2010fed reactors"],"prefix":"10.1002","volume":"107","author":[{"given":"Andrew R.","family":"Sabalowsky","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lewis","family":"Semprini","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2010,8,20]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/es034737a"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/es061438n"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/jctb.1567"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1745-6592.2005.0020.x"},{"key":"e_1_2_8_6_1","unstructured":"ChuMY.2004.Factors controlling the efficiency of bio\u2010enhanced PCE NAPL dissolution. Ph.D. thesis. Stanford University Stanford CA."},{"key":"e_1_2_8_7_1","unstructured":"ChuMYJ KitanidisPK McCartyPL.2006.Inhibition\u2010Related: Limitation to Biologically Enhanced Dissolution of Chlorinated Solvents. Proceedings of the Fifth International Conference on Remediation of Chlorinated and Recalcitrant Compounds Monterey CA. May 2006; ISBN 1\u201057477\u2010157\u20104. 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