Simultaneous nitrification-denitrification in a sequencing batch reactor equipped with fixed Kaldnes carriers
Journal Title: Journal of Advances in Environmental Health Research (JAEHR) - Year 2015, Vol 3, Issue 4
Abstract
The main aim of this study was to evaluate the performance of a modified sequencing batch reactor (MSBR) using fixed Kaldnes carriers fed with acclimated sludge for ammonium removal via simultaneous nitrification-denitrification (SND) in synthetic wastewater. The results exhibited a SND of 82.3% within a 450-minute cycle time which was higher than that of a SBR without carrier (69.83%). Nitrite accumulation rate (NAR) increased from 16.94% to 32.83% until 120 minutes of cycle time, and then, decreased to 1.17% by 450 minutes. The biomass concentration in the bio-film (674 ± 6 mg/l) was lower than suspended biomass (1984 ± 12 mg/l). However, the specific oxygen uptake rate (SOUR) of the bio-film (5.24 ± 0.28 mg O2/mg MLVSS.d) was greater than suspended biomass (1.89 ± 0.12 mg O2/mg VSS.d), indicating the higher bioactivity of the bio-film than that of suspended biomass. Up to 3% salinity had no significant effect on MSBR performance for both chemical oxygen demand (COD) and ammonium removal. These results illustrated the high efficiency of the MSBR in the treatment of wastewater containing high salinity as well as the removal of nitrogen compounds via SND.
Authors and Affiliations
Reza Darvishi Cheshmeh Soltani, Mahdi Safari, Abbas Rezaee
Keywords
Related Articles
- EP ID EP420689
- DOI 10.22102/JAEHR.2015.40206
- Views 137
- Downloads 0
Microbial removal of engine oil from polluted media (the case study: Hamadan City)
Discharging industrial wastes into the soil causes accumulation of pollutants, especially petroleum hydrocarbons and used engine oil, in the environment. This study was done to find some bacterial strains capable of remo...
The impact of visiting hours on indoor to outdoor ratio of fungi concentration at Golestan Hospital in Ahvaz, Iran
The majority of diseases caused by air pollution, such as asthma and allergies, are caused by pathogenic bacteria, which are transmitted through bioaerosols. Bacteria and fungi are the main sources of hospital infections...
Effects of dried Rose Petals (Rosa damascena) on the antioxidant capacity of Green and Black Tea
The health benefits of green and black tea are mainly associated with their antioxidant potential and phenolic compounds. The present study aimed to evaluate the effects of dried rose petals (Rosa damascena) on the antio...
Removal of parachlorophenol from the aquatic environment by recycled used tires as an adsorbent: Characterization, adsorption, and equilibrium studies
Parachlorophenol has an extended usage in refineries, petrochemical industries, insecticide, and herbicide manufacturing industries. Tire a solid waste, which is disposed in large amounts each year, a large number of the...
Assessment of Aquatic Environmental Quallty Using Gyrodactylus sp. as a Living Probe: Parasitic Biomonitoring of Ecosystem Health
Biological indicators are species that can be employed to monitor environmental quality and ecosystem health. Different groups of organisms such as plants, animals, bacteria and parasites regularly produce certain molecu...