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The technological parameters and running effect in the treatment of municipal sewage by an A2/O + Advanced treatment process are introduced and also aims to improve the application of the BIOLAK process in municipal wastewater treatment. The process flow, process parameters and structure size of the project were introduced. And the treatment effect and designing features were discussed. The running...
In recent years, the research of nitrogen and phosphorus removal in sewage has been a hotspot in the field of wastewater treatment at home and abroad with the worsening of the world-wide eutrophication of water bodies. Improved A2/O oxidation ditch of Wulongkou sewage treatment plant in Zhengzhou has achieved good effect to remove organic matter, nitrogen and phosphorus in sewage. Based on the operation...
In order to study the dewatering characteristics and efficiency of thickening low concentration excess sludge by Cavitation Air Floatation(CAF), As CAF-5 is employed to thicken low concentration excess sludge in Chaoyangzhou WWPT, the influent flow is 5m3/h, the sludge concentration is 4g/L, the dosage of flocculant FO4440SH is 1.0 kg/tDS and the dosage of surfactant 1227 is 0.2 kg/tDS, the solid...
Preparation of efficient adsorbents with sewage sludge and its application in chromium-containing wastewater treatment was discussed. The chemical physics activation method was used to dispose secondary sedimentation tank sludge and the final residual sludge to produce activated carbon, respectively. The effect of concentrations of oxidizer, activated temperature, solid-liquid ratio and activation...
Polymer Si-Fe (PSF) coagulant was prepared by co-polymerization. The oxidization of PSF was investigated by using jar test for humic acid (HA) solution sample and measuring oxidization-reduction potential (ORP) compared with that of polyferric aluminum (PFA). The results show that PSF has higher ORP value than PFA, with the difference of 420mV. PSF is an oxidization coagulant that possibly changes...
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...
Shortcut nitrification was reported to be technically feasible and economically favourable, especially when sewages with high ammonium concentrations or low C/N ratios are treated. Nitritation can be obtained by selectively inhibiting nitrite oxidizers through appropriate regulation of the systempsilas pH, DO, temperature, and sludge retention time, and so on. Nitrification tests were performed in...
A kind of improved bio-ecological combination process with high efficiency and low energy consumption for municipal wastewater treatment was put forward in this article. Based on the comparison and analysis of treatment efficiency and energy consumption with other treatment methods, conclusions had summed up that the effluent quality indexes of improved process reached the first level A criteria specified...
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