Effective start-up biofiltration method for Fe, Mn, and ammonia removal and bacterial community analysis

Metagenomic analysis of rapid gravity sand filter microbial communities suggests novel physiology ofNitrospiraspp.

“…2015; Cai et al, 2015;LaPara et al, 2015). Whereas Nitrospira may be the primary ammonium oxidizer, the high abundance of heterotrophic amoA sequences, especially in the bulk samples, suggests that heterotrophic ammonium oxidation may also occur in the RSFs.…”

Bioremediation of agricultural solid waste leachates with diverse species of Cu (II) and Cd (II) by periphyton

“…In addition, the pH, EC and DO could affect the remediation efficiency (Sullivan et al, 2013), requiring the microbial aggregates to tolerate widely fluctuating conditions. The assembly of various microbial communities, forming micro-porous structures on their matrix surfaces, might act as an accumulator or an adsorbent to trap the metal ions (Cai et al, 2015). In this study, the greatly increased EC over time for the water-and Na 2 EDTA-washed leachates provided direct evidence that the ions in the agricultural solid waste leachates are likely to be adsorbed and desorbed by the periphyton.…”

Effective curves of completing simultaneous ammonium and manganese removal in polluted water using a biological aerated filter

“…Although the simultaneous removal in a single-stage treatment is difficult to perform, nowadays it has been reported that it can be done, as achieved by previous studies [3][4][5][6][7]. In Malaysian, most of the rivers used for drinking water uptakes has been contaminated by NH 4 + -N and Mn 2+ that is discharged by industrial activities.…”

“…The main operational parameters in the simultaneous removal, as well as dissolved oxygen (DO), ORP and pH during the removal process were not previously investigated online, to depict and correlate with the actual completion time of NH 4 + -N and Mn 2+ removal. The previous investigations only focused on hydraulic loading [4,7,8], the type of adsorbent [9], microbe communities [5], aeration intensity [4] and start-up operation [3], without the in-depth detection of the complete simultaneous removal of NH 4 + -N and Mn 2+ . DO is one of the most influential factors in biological systems for simultaneous NH 4 + -N and Mn 2+ removal.…”