Antifungal effects of BiOBr nanosheets carrying surfactant cetyltrimethylammonium bromide.

BiOBr nanosheets are important photocatalytic nanomaterials. However, their biological effects remain to be explored. In this study, we investigated the antifungal effect of BiOBr nanosheets on Candida albicans.

[Enhanced Treatment of Printing and Dyeing Wastewater Using HO-Biochemical Method].

The traditional biochemical treatment of printing and dyeing wastewater has limited efficiency. This study investigated whether HO could strengthen the biological ability of the hydrolytic acidification/biological contact oxidation process (A/O), which effectively treats the printing and dyeing wastewater. After biofilm formation and the biochemical system startup and operation by HO, the system was successfully started and steadily operated when HOwas added into reactor A with the HO voluve fraction of 3 mL·L, doses of 100.

[Fast Start-up and Performance of the CANON Process Based on a SBAF Systemand Evolution Properties of Microorganisms].

The CANON process has the disadvantages of long start-up periods and unstable operation. In the SBAF system, under strictly controlled conditions of dissolved oxygen (DO) and temperature, a CANON process is started up in 51 days and is operated stably for 278 days using a new method of independent research and development. The results show that the maximum and average ARR are 98.

[Fast Start-up of SBAF System Assisted CANON Process and the Microbial Analysis].

Long period start-up is one of the main restraining factors of the single-stage completely autotrophic nitrogen removal over nitrite (CANON) process.This study investigated the fast start-up of the CANON process initiated by a submerged biological aerated filter (SBAF) method.With conventional activated sludge from the secondary sedimentation tank of municipal waste water treatment plants as the seed sludge,the CANON process was successfully started up after the acclimation of sludge microorganisms for 48 days under the experimental conditions of (30±2)℃,organic carbon free and controlled dissolved oxygen (stage Ⅰ:0.