Study On Activated Carbon Filter Of Water Advanced Treatment For Yellow River Reservoir Water

This subject was supported by the high taste and high ozone bromide Yellow River Reservoir-Optimization of biological activated carbon technology research and demonstration, leading under the major science and technology projects of national water pollution control and management (2008ZX07422-004). The O3-BAC was used in the depth of water treatment to Yellow River water, and optimized this treatment in order to provide a theoretical basis for the demonstration project and technical guidance.This paper studied the adsorption of activated carbon, selected the four different types of activated carbon on its static assay to the Yellow River water. The amount of activated carbon were investigated, such as the temperature, pH, adsorption time and ozone dosage on adsorption, in order to selct a type of activated carbon for water quality in the Yellow River. The results showed that:(1) Taixing broken carbon (2#) had a larger surface area, it had a rich pore structure, was the best one of four organic carbon; (2) The removal of CODMn and UV254 were influented by the carbon content and pH. There was an optimum value for the activated carbon dosage on the removal of organic matter. The acidic environment was better than the alkaline environment; (3) The removal rate increased with adsorption time rising, but growth slowed. The best time of adsorption was 120min; (4) Ozone enhanced the removal of organic matter, the best dosage of ozone was 3mg/L, when the dosage was higher than this value, there was no significant increase in removal rate.In order to optimize the operational parameters of advanced treatment process, this process of continuous operation on the biological carbon filter for removal of organic matter were studied. The research topics included:(1) The filter was started in the way of natural biofilm, the biofilm success of biological carbon filter requires about 30 days at room temperature; (2) The factors included hydraulic loading, carbon layer depth, ozone dosage, mode of operation etc. The results showed that:when the hydraulic load was 12.7m3/(m2·h) the ozone dosage was 2mg/L, CODMn and UV254 removal rates reached 39.1% and 48.8%, from the start of supporting layer, removal rate rising with the carbon layer height increased, the best adsorption region was 0cm～180cm; (3) With piezometric head loss on the filter was determined. The results showed that:With the increase of running time, the total head loss was increasing, but the rate of increase was different in different layers. The biggest head loss was 0cm～180cm carbon layer; (4) The different backwashing ways were studied. The results showed that:when the air impact strength was 10L/(m2·s), water will strength was 10L/(m2·s), the recoil effect was the best; (5) The biomass and bio-phase was studied. The results showed that:from the start of supporting layer, the biomass decreased with the carbon layer depth increases. A lot of biomass reduced after backwashing. The upper and lower filter biomass decreasing rate of biomass were 51.6% and 38.6%.