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Due to the difficulty of oilfield produced water treatment and low efficiency of coagulation technology. A more efficient treatment technology was necessity. Produced water treatment by ozone enhanced coagulation was investigated in this study in order to develop a new method for oilfield produced water treatment. The results showed that addition of ozone could reduce the dosage of coagulant (PAC)...
Methyl tert-butyl ether (MTBE) is a common additive for producing a clean burning fuel with a higher Octane number and less emissions. Batch adsorptive capacity, continuous flow breakthrough and biological activated carbon (BAC) treatment experiments were conducted to compare the adsorptive capacities of four activated carbons for MTBE, to obtain the adsorptive capacity indicators useful for predicting...
One of China largest river, Songhua River was polluted due to the explosion at a PetroChina factory in Jilin province in 2005. A full scale test was carried out to investigate the removal of nitrobenzene in the raw water from polluted Songhua River. The removal and control effects of nitrobenzene by using Powered Activated Carbon (PAC) absorption and Granular Activated Carbon (GAC) filtration as emergent...
Batch adsorption equilibrium experiments and continuous flow breakthrough experiments were conducted to compare the effectiveness of 7 granular activated carbons (GACs) in removing trichloroethylene (TCE) from groundwater. The order of GACs' adsorptive capacities for TCE was in the same order of their phenol numbers (indicator for internal surface of <;1 nm micropores). A small amount of methanol...
Phosphorus is one of the key elements necessary for the growth of microorganism in drinking water. It stimulates the growth and/or regrowth of microorganism and reduced biostability in drinking water. The demand for effective and inexpensive technology is to increase in response to the widespread recognition of the deleterious health effects of microorganism risk in pipe network. In this study, activated...
Studied was the comparison of ozone-biological activated carbon (O3-BAC) and granular activated carbon (GAC) processes for advanced drinking water treatment. The effects by O3-BAC and GAC were evaluated based on the removal of the indexes including CODMn, UV254, TOC, BDOC, NH4+-N, NO3--N and NO2--N. The results showed that the treatment effect by O3-BAC was better than that by GAC alone. When ozone...
In this paper, the characteristics, size distribution and influencing factors of carbon fines and symbiotic relationships between attached bacteria and fines were detected and analyzed under traditional process conditions. The STXM measurement could be used to judge carbon fines. The number of fines in the GAC effluents during the filtration cycle contented a trend of rise first then fall. And the...
In order to reveal the effect of powdered activated carbon (PAC) pretreatment on Ultrafiltration (UF) membrane filtration performance, PAC-UF system treating Yangtze River water was studied. The results showed: 41.46% of UV254, 31.94% of CODMn, 38.44% of DOC, and 54.69% of THMFP were removed in the PAC-UF system. VHA and CHA could be removed effectively by PAC, which decreased risks of membrane fouling...
Catalytic ozonation/biological activated carbon process was applied for advanced drinking water treatment in this study. The results showed that with the ozone dosage of 2.0mg/L, the removal of CODMn, TOC and UV254 in catalytic ozonation unit was 24.6%, 15.9% and 59.8%, and increased to 40%, 16% and 68% respectively after being treated by BAC. The catalytic ozonation unit contributed to more than...
Removal of bromate by ferrous sulfate reduction was studied using water plant filter effluent spiked with bromate. Effects of FeSO4 dosage, reaction time, pH and DO concentration on bromate reduction were investigated. Removal of residue total iron by GAC was also studied. Results showed that, when initial bromate concentration is about 25 mug/L, pH is 7.2, DO concentration is 2.3 mg/L, temperature...
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