Premium
Large‐scale anaerobic/aerobic treatment of complex industrial wastewater using immobilized biomass in fluidized bed and air‐lift suspension reactors
Author(s) -
Heijnen Sef J.,
Mulder Arnold,
Weltevrede René,
Hols Pam H.,
van Leeuwen Hans L. J. M.
Publication year - 1990
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270130127
Subject(s) - fluidized bed , effluent , wastewater , anaerobic exercise , industrial wastewater treatment , bioreactor , environmental science , sewage treatment , waste management , biomass (ecology) , pulp and paper industry , clarifier , moving bed biofilm reactor , activated sludge , settling , gas lift , chemistry , environmental engineering , engineering , biofilm , ecology , physiology , organic chemistry , petroleum engineering , biology , genetics , bacteria
Warm concentrated industrial wastewaters are preferably treated in an anaerobic reactor for reasons of energy generation and low surplus sludge production. Problems to be solved in the practical application concern a low growth rate of the micro‐organisms, their low settling rate, process instability and the need for after treatment of the noxious anaerobic effluent which often contains NH 4 +and HS − . The use of biomass immobilized on small suspended carriers (< 0.5 mm) has proven to be a suitable means to overcome most of these problems. Results are presented on pilot and full‐scale pretreatment of industrial wastewater in an anaerobic 2‐state fluidized bed reactor for CH 4 ‐production and laboratory and pilot scale post‐treatment of the anaerobic effluent, which contains NH 4 +and HS − in an aerobic air‐lift suspension reactor for the production of NO 3 −and SO 4 2− .