Mathematical modelling of hydrogen sulphide emission and removal in aerobic biofilters comprising chemical oxidation.
Four different empirical expressions have been compared for estimating the removal of hydrogen sulphide (H(2)S) from wastewater by chemical oxidation during its treatment in an aerated biofilter. The relative importance of this removal process is considered in a mass balance proposed by an emission model. Two of the four models investigated were able to predict the mean H(2)S removed fraction within a confidence interval of 95% and they demonstrated good agreement with experimental data. Biodegradation and oxidation were the two main removal mechanisms in the biofilter whereas stripping and volatilization made only minor contributions. However they can be of significance when the emission rates are calculated.
Santos
Jane Meri
JM
Departamento de Engenharia Ambiental, Universidade Federal do Espírito Santo, Av. Fernando Ferrari 514, 29.060-970 Vitória, ES, Brazil. janemeri@npd.ufes.br
Lopes
Evenilson Soprani
ES
Reis
Neyval Costa
NC
de Sá
Leandro Melo
LM
Horan
Nigel John
NJ
D000332:Aerobiosis; D001673:Biodegradation, Environmental; D005374:Filtration / Q000379:methods*; D006862:Hydrogen Sulfide / Q000302:isolation & purification* / Q000378:metabolism*; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010100:Oxygen / Q000032:analysis; D012995:Solubility; D013431:Sulfates / Q000032:analysis; D018508:Water Purification
D013431:Sulfates; D010100:Oxygen; D006862:Hydrogen Sulfide