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In order to reduce production cost of Pseudomonas aeruginosa T1, which has the ability of producing the biosurfactant when using crude oil as the sole carbon source, Three experimental methodologies (Plackett-Burman design (PBD), steepest ascent design (SAD), Central composite rotatable design (CCRD)) were applied to optimize the medium ingredients of the strain. In the verification experiment, the...
The performance and enhancement of pollutants removal in raw municipal sewage by a new pretreatment process were investigated in this study. The experiments were carried out with a GS sedimentation tank in full scale plant. The results revealed that average removal efficiency of TP, TSS, and TN achieved 49%, 67.3% and 20% respectively during stable running period. TSS removal rate could achieve about...
The influencing factors of simultaneous nitrification and denitrification (SND) was investigated in this study. The experiment was carried out with synthetic wastewater in Sequencing batch reactor (SBR). Some effect factors and mechanism of SND were studied through continuous running of SBR process. Optimum operation condition of SND was obtained in the experiment, and it was found that the removal...
The synergistic effect of microbial consortium S3 (including S3-1, S3-2, S3-3 and S3-4), which has the ability of degrading Polycyclic Aromatic Hydrocarbons was studied by solid phenanthrene as the sole source of carbon and energy. The research showed that only S3-1 had the characteristics of phenanthrene-degrading and other three strains could use the metabolites of S3-1 in different degree. It was...
The pretreatment of coking wastewater using ASBR was conducted at 35?? in this paper. The addition of trace elements to the anaerobic reactor has positive effect on the anaerobic treatment of coking wastewater, but too much or too little of it will have negative effect. At the same time the addition of trace elements will be a large cost in field scale anaerobic wastewater treatment. So it is necessary...
A novel MBR system as aerobic granular sludge membrane bioreactor (AGSBR) developed for controlling membrane fouling was investigated in this study. In the AGSBR system, the aerobic granular sludge had exhibited to be smooth and nearly round in shape. It exhibited good performance on biodegradation and phosphorus removal when compared with a conventional activated floe sludge membrane bioreactor (AFMBR),...
A submerged membrane bioreactor (MBR) combined with aerobic granular sludge (AGS) was studied in this research, in order to enhance removal performance containing higher concentration of organic solids, nitrogen and phosphorus than conventional biological phosphorus removal process. Aerobic granular sludge technology offered a possibility of simultaneous COD, nitrogen and phosphate removal in one...
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