PMC:4160552 / 1165-3193
Annnotations
{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/4160552","sourcedb":"PMC","sourceid":"4160552","source_url":"https://www.ncbi.nlm.nih.gov/pmc/4160552","text":"Background\nNowadays, one of the major environmental problems is the oily wastewaters produced by industries, particularly by refineries. Disposal of oily wastewaters into the environment can result in environmental pollutions and serious damages to the ecosystem. Since conventional treatment processes are not sufficient to achieve the water quality requirements, advanced treatment processes are required [1].\nThe HMBR is an advanced technology which traditionally combines activated sludge as a suspended growth system with microfiltration (MF) or ultra filtration (UF) membrane [2]. This process has now become an attractive choice for the treatment and reuse of industrial wastewaters such as paper mill; food production; fuel port [3–5] and municipal wastewaters [6,7]. The HMBR process has been proved to have many advantages in comparison to conventional biological processes such as small footprint size of the treatment unit, reduced sludge production, complete retention of solids and flexibility of operation [8].\nThe initiative of the present research is substituting the suspended growth system with the attached growth system. Therefore, RBC (plus Kaldnes media) as an attached growth system was coupled with external UF membrane to treat oily wastewater.\nThe reason for choosing RBC can be related to many advantages of this reactor in treating wastewaters, particularly oily wastewaters, compared to the active sludge process. Among the advantages, one can include high efficiency of organic matter removal, resistance against organic and hydraulic shock loads and low energy consumption [9].\nExperiments were carried out to compare the performance of the RBC and the HMBR in treating the oily wastewaters. After adjusting oil-eating microorganisms with system, the influence of some parameters as HRT, TPH and nutrients concentration on the performance of system were studied. The efficiency of two systems in removal of oily pollutants and organic matters produced by nutrients was also examined and compared.","divisions":[{"label":"title","span":{"begin":0,"end":10}},{"label":"p","span":{"begin":11,"end":411}},{"label":"p","span":{"begin":412,"end":1025}},{"label":"p","span":{"begin":1026,"end":1270}},{"label":"p","span":{"begin":1271,"end":1609}}],"tracks":[]}