Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
2992711
Reference Type
Technical Report
Title
Degradation of O, O-dimethyl phosphorodithioate by activated sludge
Author(s)
Kanagawa, T; Dazai, M; Tkakahara, Y
Year
1981
Report Number
HEEP/82/08454
Volume
YATABE
Issue
YATABE
Page Numbers
45-52
Abstract
HEEP COPYRIGHT: BIOL ABS. O,O-Dimethyl phosphorodithioate (DMDTP) is a precursor in the production of such organophosphorus pesticides as malathion, dimethoate, etc., and is abundant in waste-water of pesticide manufacturers. The activated sludge was acclimated to DMDTP by the fill-and-draw method. The acclimated, activated sludge degraded 500 mg/l DMDTP in 7 h and as a result produced 260 mg/l of Pi and 510 mg/l of sulfate. The pH of the mixed liquor was adjusted to degrade DMDTP and the optimum pH was from 6.5-7.0. The activated sludge acclimated to DMDTP degraded dimethyl phosphorothioate, dimethyl phosphate, diethyl phosphorodithioate and diethyl phosphate.
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity