Open AccessPilot-Scale Validation of a New Sensor for On-Line Analysis of Volatile Fatty Acids and Alkalinity in Anaerobic Wastewater Treatment Plants
Author(s) -
Francisco Molina,
Gonzalo Ruíz-Filippi,
C. de la Cruz Garcia,
Juan M. Lema,
Enrique Roca
Publication year - 2009
Publication title -
environmental engineering science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.46
H-Index - 65
eISSN - 1557-9018
pISSN - 1092-8758
DOI - 10.1089/ees.2007.0308
Subject(s) - alkalinity , bicarbonate , wastewater , chemistry , anaerobic digestion , sewage treatment , pulp and paper industry , anaerobic exercise , spectrum analyzer , waste management , environmental science , environmental engineering , methane , engineering , physiology , organic chemistry , biology , electrical engineering
This paper describes a validation procedure applied for an on-line titrimetric analyzer (AnaSense ® -Anaerobic Control Analyzer) prototype designed to detect of volatile fatty acids (VFA) and alkalinity (bicarbonate). The AnaSense ® analyzer was recently developed under the framework of the TELEMAC European Project. A pi- lot-scale evaluation of the analyzer was carried out in an anaerobic wastewater treatment plant, in a hybrid Upflow Sludge Bed Filter (USBF) reactor with an overall volume of 1.15 m 3 . The sensor uses two methods, both based on two-point titrimetric analyses, for determining VFA and alkalinity concentration. AnaSense ® per- formed on-line monitoring of VFA (13-4,900 mgL 1 ) and bicarbonate (2.5-49.5 mEqL 1 ), and demonstrated sufficient accuracy for both VFA and bicarbonate detection. Intermediate Alkalinity/Total Alkalinity (IA/TA) and Intermediate Alkalinity/Partial Alkalinity (IA/PA) ratios were also evaluated to test the suitability of the sensor for anaerobic digestion process control.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom