Dissertation
Dissertation > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization

The Experiment Study on the Enhanced Onsite Bio-contact Oxidation Process for Source Water Quality Control

Author ZhangXiaoLei
Tutor HuangTingLin
School Xi'an University of Architecture and Technology
Course Environmental Engineering
Keywords Water lifting and aeration Bio-contact oxidation Immobilized microorganism Micro-polluted source water Chemical oxidation
CLC X703
Type Master's thesis
Year 2008
Downloads 150
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The bio-contact oxidation process enhanced by water-lifting aerator was an onsite process for water quality control.The water-lifting Aerator mixed and oxygenated the water body,the bio-contact oxidation filler device could remove the organic matter efficiently in the micro-polluted source water under the conditions of DO concentration,nutrition’s transport and turbulence of water body provided by water-lifting aerator.The technology of bio-contact oxidation process enhanced by water-lifting aerator had the advantages of less investment and lower operating costs. A stable eco-efficient system were formed on the surface of fillers in a short time because of the apply of immobilized microorganism technology.The experimental study on the removal of organic matter in micro-polluted source water by immobilized microorganism fillers showed that the removal rate of different kinds of fillers had a big difference.Some kinds of fillers could remove the organic matter in the water efficiently.The pilot experiment study on the bio-contact oxidation process enhanced by water-lifting aerator showed that the removal rate of ammonia-nitrogen,TN,TP, CODMn,UV254were 87.5%,18%,65%,26%,27.1%respectively.The bio-phase analysis showed that a large number of bacteria,protozoa and epigenetic animals could be observed through microscope.The experiment cycle was 16 days,during that time,the temperature was 16℃,the dissolved oxygen concentration around the filler was 8.4~8.9 mg/L.Chemical oxidation technology combined with the bio-contact oxidation process enhanced by water-lifting aerator were used to remove the organic matter in the micro-poUuted water.First,Chlorine was voted in the water through water-lifting aerator(dosage of 3 mg/L),after 5 days,the water improvement device of the bio-contact oxidation process enhanced by water-lifting aerator started to run.The water quality was monitored everyday,the experiment results showed that pre-oxidation could increase the biodegradability of the organic matter in the water body.The removal rate of ammonia-nitrogen,TN,TP,CODMn,UV254were 87.5%, 31.1%,42.3%,40.7%,34.8%respectively.

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