title: Effect of corrosion of steel elements on the treatment of dairy wastewater in a UASB reactor.
abstract: Experiments were performed in parallel using two laboratory upflow anaerobic sludge blanket (UASB) reactors. One of the two reactors was packed with spiral elements made of steel wire with 48% iron content in order to examine the influence of the steel elements on the chemical oxygen demand (COD) and efficiency of phosphorus removal from synthetically prepared dairy wastewater. A strong relationship was found between anaerobic corrosion and efficiency of phosphorus removal. Phosphorus removal in the reactor packed with steel elements was between 16.4% and 64.4% higher than without the steel elements present. The anaerobic corrosion process improved COD removal efficiency by 1.0-3.1%, which was statistically significant. When steel elements were present the methane content of the biogas was increased by 6.7%. Increasing the organic loading rate had a strong effect on the anaerobic efficiency of the dairy wastewater treatment.
authors.affiliation: Department of Environmental Protection Engineering, University of Warmia and Mazury in Olsztyn, Poland. jedrzejewska@uwm.edu.pl
authors.forename: M
authors.initials: M
authors.lastname: Jędrzejewska Cicińska
authors.forename: M
authors.initials: M
authors.lastname: Krzemieniewski
mesh_terms: D019149:Bioreactors / Q000382:microbiology*; D003343:Corrosion; D003611:Dairy Products / Q000382:microbiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology*; D013232:Steel / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical; D013232:Steel