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Main Title Treatability studies of pesticide manufacturing wastewaters : dazomet /
Author Monnig, Edward. ; Zweidinger, Ruth A. ; Warner, Mary
Other Authors
Author Title of a Work
Murphy, Michael.
Zweidinger, Ruth.
Little, Linda.
CORP Author Research Triangle Inst., Research Triangle Park, NC.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Publisher Industrial Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1980
Report Number EPA/600/2-80/077b; PB81-129033; EPA-68-02-2688
Stock Number PB81-129033
Subjects Sewage--Purification--Biological treatment--Research. ; Water--Pesticide content. ; Dazomet.
Additional Subjects Water pollution control ; Pesticides ; Sulfur organic compounds ; Manufacturing ; Industrial waste treatment ; Activated sludge process ; Dazomet ; Biological industrial waste treatment ; Thiadiazine thione/tetrahydro-dimethyl ; Chemical oxygen demand
Library Call Number Additional Info Location Last
NTIS  PB81-129033 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 41 pages : illustrations ; 28 cm.
The report gives results of laboratory studies of the treatability of manufacturing wastewater from synthesis of the pesticide, dazomet. A tiered approach was taken: the least costly and most available treatments were investigated first. Effluent from the manufacture of dazomet was tested for treatability by activated sludge systems when diluted to 1:100, 1:500, and 1:1000 in municipal wastewater. At 1:100, dazomet showed greater than 95% reduction after biological treatment; however, effluent COD levels were unacceptably high at an average of 160 mg/liter. At 1:500, effluent COD was much closer to the control effluent; however, nitrification of ammonia was severely hampered. At 1:1000, dazomet wastewater had a variable effect on nitrification while effluent COD levels were close to those of controls. It is recommended that dazomet wastewater be diluted to at least 1:1000 in municipal wastewater to minimize the negative effects on the nitrification of ammonia during the activated sludge treatment process.
"EPA-600/2-80-077b." EPA contract no. 68-02-3688, task no. 109, program element no. 1BB610. EPA project officer: David C. Sanchez. Includes bibliographical references. Microfiche.