Treatment COD and BOD wastes with TKN waste from environmental laboratories

Treatment COD and BOD wastes with TKN waste from environmental laboratories
การบำบัดของเสีย COD และของเสีย BOD ด้วยของเสีย TKN จากห้องปฏิบัติการทาง สิ่งแวดล้อม

Supaporn Jariyuwat, F. of Environmental Management, PSU.
Somtip Danteravanich, F. of Environmental Management, PSU.
Cherdchan Siriwong, F. of Environmental Management, PSU.
Corresponding e-mail : dsomtip@ratree.psu.ac.th

Presented : The 26th Congress on Science and Technology of Thailand, 18-20 October 2000, Bangkok
Key words : environmental laboratory, hazardous waste

Environmental labolatories generally discharge hazardous waste, especially COD, BOD and TKN wastes. These wastes contain heavy metals which are either acidic and alkaline wastes. In order to treat these waste, neutralization and heavy metals precipitation could be used. This report presents the results of COD and BOD wastes treated with TKN waste. It was observed that treatment of COD waste with TKN waste, Hg and Cr can be removed 99.99% and 99.90%, respectively. When BOD waste was treated with TKN waste, Mn was removed to be 87.95% and 92.20% at mixture pH of 4 and 7 respectively.

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