[Bacterial Community Shifts and Nitrogen Removal Characteristics for a SNAD Process Treating Anaerobic Digester Liquor of Swine Wastewater (ADLSW) in a Continuous-Flow Biofilm Reactor (CFBR)].

To realize a simultaneous partial nitrification, ANAMMOX (anaerobic ammonium oxidation), and denitrification (SNAD) process treating anaerobic digester liquor of swine wastewater (ADLSW) in a continuous-flow biofilm reactor (CFBR), we first gradually increased the influent ammonium (NH-N) concentration, and then enhanced the ADLSW ratio in the influent during operation; dissolved oxygen (DO) was controlled at (0.4±0.1) mg·L by adjusting the air flow rate, and the temperature was kept at (30±1)℃.

Investigating adsorption performance of heavy metals onto humic acid from sludge using Fourier-transform infrared combined with two-dimensional correlation spectroscopy.

Efforts to improve sludge resource utilization have become increasingly important. In this study, humic acid (HA) was extracted from sludge samples collected from a sewage treatment plant, and then used for the adsorption of heavy metals. We used two-dimensional correlation spectroscopy (2D-COS) integrated with Fourier-transform infrared spectroscopy (FTIR) to explore the adsorption between sludge HA (HA) and three metal ions (Cu, Ni, and Pb).

[Start-up of Partial Nitritation AGS-SBR and Analysis of Its Microbial Community Composition].

The mature aerobic granular sludge (AGS) was inoculated in an sequencing batch reactor (SBR) to treat the simulation wastewater with low carbon nitrogen ratio (COD/N). The start-up characteristics of partial nitritation (PN) based on gradually increasing influent ammonia concentration strategy were investigated. The reactor was operated at dissolved oxygen (DO) of 0.