Premium
On‐Line Monitoring of Sewage for the Detection of Toxicity and Measurement of Short‐Term BOD
Author(s) -
reid J. m. c.,
nason R. b.,
fisher J. t.
Publication year - 1995
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.1995.tb01609.x
Subject(s) - sewage , nitrification , calibration , environmental science , term (time) , sampling (signal processing) , alarm , environmental engineering , activated sludge , bioreactor , line (geometry) , waste management , sewage treatment , environmental chemistry , chemistry , engineering , filter (signal processing) , mathematics , statistics , physics , organic chemistry , geometry , quantum mechanics , aerospace engineering , nitrogen , electrical engineering
An on‐line monitor is described which measures the short‐term BOD and detects the presence of nitrification inhibitors. The instrument, which is based on a 10‐1 activated‐sludge bioreactor and incorporates auto‐calibration facilities, has been tested over several years operating on crude and settled sewage. Calibrations against sewage strength parameters show linear and reproducible results. Toxicity detection is automatically confirmed by checking the degree of oxidation of a standard solution of ammonia. If detection is confirmed, sampling is initiated and an alarm is triggered.