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Dying-printing wastewater is treated under micro-aerobic situation in IC reactor, the experiment uses 10%PAC and 0.05%PAM, with the ratio of the raw water to flocculent 400:1, after coagulating sedimentation, the biochemical performance of the wastewater is greatly improved, up to about 0.22; when influent loads is improved to about 4655.1mg/L, dissolved oxygen concentration 0.3mg/L and HRT 5h, the...
In this work, chemical oxygen demand (COD) removal and decolorization of polyester scouring effluent by coagulation-acidation have been studied experimentally. Acidulated bentonite was used as coagulant. The effects of bentonite dosage, PAM dosage, stirring time, and pH after acidation on the efficiency of COD and color reduction were studied by orthogonal methodology. Finally the optimum conditions...
The composite photo catalyst of Fe3+-TiO2-zeolite is prepared in a bench scale, which is immobilized into a zeolite matrix by means of sol-gel technique. The oilfield wastewater in Huabei oilfield was chosen as the model pollutant to evaluate photo catalytic activity under the ultraviolet light and sunlight irradiation respectively, the possible mechanism of photo catalytic oxidation was deduced....
The research was on the effect of the removal of COD, growth rate of VFA, and biodegradability of hard-biodegradable chemical industrial wastewater with high salinity caused by the device operating parameters of the three different hydrolysis acidification reactors. The results showed that the differences of biodegradability increase rate and COD removal was slight among the three different reactors...
Activated carbon (AC) supported titanium dioxide (TiO2 ) photocatalyst (TiO2/AC) was prepared by two-step sol-gel process. Crystal structure, and surface morphology of TiO2/AC were characterized by X-ray diffraction (XRD), N2 adsorption-desorption isotherm measurements (BET) and scanning electron microscopy (SEM), respectively. The results show that average crystal size of TiO2 in 11% TiO2/AC catalyst...
This study has investigated the effect of humus soil activated sludge on the nitrogen and phosphorus removal. The results from experiments indicate that humus soil SBR (HS-SBR) process did not have a better effect on the COD removal compared it with SBR process. They had about 89% removal efficiency on average. HS-SBR process could enhance the removal of nutrient salt, especially TP. The removal efficiency...
Sanitary landfill leachates are considered as heavily polluted industrial wastewaters, so special care is required for their efficient treatment and disposal. The most popular biological treatments are mostly the secondary stage in a combination with additional physical-chemical pre-process. A novel inorganic polymer flocculants, poly-ferric(III)-magnesium(II)-aluminum(III)-sulfate (PFMAS in brief)...
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