| In recent years,the use of new organics has increased,resulting in a complex composition of pollutants in sewage.In response to this problem,taking the secondary effluent of an urban sewage treatment plant in Tangshan City as the research object,the advanced ozone oxidation method and the contact oxidation process were used to further treat the secondary effluent of the urban sewage treatment plant,and the reaction conditions were optimized to construct an ozone-coupled contact oxidation reaction.system to further improve the deep processing effect.By analyzing the characteristics of the secondary effluent quality of an urban sewage treatment plant in Tangshan City,the pollutants COD,BOD5,TP,SS that need advanced treatment were determined,and UV254was introduced to reflect the humic acid and unsaturated aromatic organic compounds in the treatment process.Poly-aluminum chloride can effectively reduce the concentration of TP and SS,and it has a catalytic effect on ozone.After ozone catalytic oxidation treatment,the concentration of BOD5increased from 6.3mg/L to 9.1mg/L,the biodegradability index B/C of water quality increased from 0.16 to 0.40,and the biodegradability of water quality was good,which is the feasibility of the subsequent contact oxidation process Preconditions are provided.The artificial inoculation method was used to hang the film.After 15 days of operation and debugging,the contact oxidation system ran stably.The effect of advanced treatment was the best at L,and the removal rates of COD,BOD5,TP,SS,and UV254were 57.4%,31.3%,63.0%,43.6%,and 55.8%,respectively.After the ozone coupled contact oxidation advanced treatment,the effluent can stably reach the Class IV standard.The ozone-coupled contact oxidation process makes full use of the respective advantages of the ozone advanced oxidation method and the contact oxidation method,and achieves the effect of complementing each other.The treatment of secondary effluent provides a new idea.Figure 46;Table 27;Reference 53... |
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