Papers by Keyword: Heavy Oil Wastewater

Abstract: To reduce the pollutants of a heavy oil wastewater, a process of high performance compact reactor (HCR) coupled with hydrolytic acidification was investigated, focusing on the removal effect of the typical pollutants and the hydrolytic retention time (HRT) of HCR system.. The results showed the removal rates of COD and oil were 20.4%~40.7% and 25.5%~39.8% after the treatment of hydrolytic acidification, while the whole system reached the 80% removal rate. When the HRT was 48h and jet flow was 3.1m³/h in HCR process, COD and oil were blow 200 mg/L and 10 mg/L, which met the requests of next treatment of wastewater.

Abstract: Heavy oil wastewater must be pretreated if membrane technology was used to treat it. According to the quality analysis of heavy oil wastewater, the processes of silica removal by magnesia agent, filtration by fiber ball and adsorption by activated carbon were employed to treat heavy oil wastewater so that treated water could meet the demand of feed for membrane.

Abstract: COD from heavy oil wastewater was removed by activated carbon on room temperature. It was showed that removal efficiency of COD reached above 65% under the condition of 50min of adsorption time, 7 of pH, 6g of the used activated carbon and 1kg of activated carbon was used to treat 1m3 of heavy oil waste water.

Abstract: Oily sewage is one of the wastes produced in the oil industry production process and its quantity has been increasing year by year, which influences the environment and human health severely. Electric flocculation method is one of the wide application electrochemical treatment technologies for the oily wastewater treatment at home and abroad, which has higher efficiency than other technologies at the aspect of the organic pollutants degradation. A simulative experiment device dealing with heavy oil sewage by the electric flocculation method has been designed in this paper. The mechanism of the electric flocculation method in removing organic matter of the heavy oil sewage by analyzing the change of the composition and content of the organic matter in water samples before and after the process of the electric flocculation has been studied. Research results show: the carbon/tin dioxide electrode is better than the carbon/ ruthenium dioxide electrode in removing organic matter; most alkanes matters in the oily wastewater have been removed in the dispersing oil form by the electric flocculation; as the current density increases, the types and quantity of the response organic matter can be improved while types of the new synthetic organics increase. At the same time, this paper provides a theory support in specific optimization of the electricity flocculation flotation in oily wastewater treatment technology and process.

Abstract: For heavy oil wastewater from Henan oilfield, removal of silica has been investigated under the condition of different flocculants and reaction time when magnesia has been used as a desilica agent. An optimum method has been determined by conditional experiments, 63% of silica could be removed.

Abstract: A field pilot test was constructed on a two stage Dissolved Air Floatation (DAF) combined with Activated Sludge Process (ASP) and Immobilized microorganism biological filter (I-BF) has been constructed in Liaohe oilfield, China to treat heavy oil wastewater with large amounts of dissolved recalcitrant organic compounds and low nutrient of nitrogen and phosphorus. By operating the system for 185 days, chemical oxygen demand (COD) removal rates were 67.9 % and 88.4 % in DAF and I-BF effluents, respectively. Environment Scanning electron microscope (ESEM) showed that large quantity of filamentous microorganisms was immobilized on carriers without causing foaming or bulking. This integrated system appeared to be a useful option for the treatment of heavy oil wastewater in Liaohe oil field.