| Ship domestic sewage is a special kind of sewage, because of its special environment of production and discharge, land sewage treatment process is limited which is given priority to with biological treatment technology. Advanced oxidation technology combined with ultraviolet light has a rapid degradation of organic matter in wastewater, reaction thoroughly, strong abilit y to resist impact load and high equipment integration degree, etc.which has a great advantage in the field of ship domestic sewage treatment.In this paper, aiming at the treatment of ship domestic wastewater,we proposed the degradation experiment research of uv- light and its auxiliary advanced oxidation process.In this research project, we carried out a comparative study of ship domestic sewage treatment between the UV photolysis and Fenton process firstly. Experimental results show that on the degradation of CO D and sterilization, the UV photolys is showed great advantage. In order to further study the UV photolys is degradation law to ship domestic sewage, the experimental study has carried on the influence factors of UV photolysis technology to deal with ship domestic sewage.Results showed that UV light can effectively degradate organic pollutants of sewage. DO in water, initial p H, initial concentration of organic matter, and UV light intensity have an effect on the degradation significantly.Indirect photolysis has great contribution to reaction system, by changing the aeration way and carried gas types, the DO value in water will increase, which can greatly promote the UV photolysis degradation.UV auxiliary advanced oxidation technologies degradation results:(1) the sewage degradation effect by UV/ H2O2 process is great, under the init ial p H = 3, [H2O2]= 5 m M, four la mp irradiation condit ions at the same time,by the reaction for 20 min, CO D removal rate can reach 75.6%.The CO D degradation effect under acid condit ion is significantly better than that of the neutral and alkaline condit ions. When H2O2 dosing quantity is insuffic ient, CO D removal rate increases with increasing concentration of H2O2, but when H2O2 concentration is higher than 5 m M, the removal rate of COD increase less. With the increase of the number of UV light source opened,CO D removal rate increase gradually.(2)The UV-Fenton degradation results:the degradation effect of UV- Fenton oxidation system is remarkable, under the initia l p H = 3, [Fe2 +]= 30 mg/L, [H2O2] =10 m M,four lights irradiation condit ions at the same time, after the reaction of 15 min,CO D removal rate can reach 70.8%.The influence of initial p H value, UV light intensity and additive quantity of hydrogen peroxide on the UV- Fenton oxidation system is similar to the UV/ H2O2 oxidation system, the influence of CO D degradation rate increased with the increase of concentration of Fe2+, until up to 30 mg/L.To sum up, the degradation effect of ultraviolet and its auxiliary advanced oxidation technologies can availably degrade organic matter of ship domestic sewage.UV/H2O2 and UV-Fenton method for the degradation of ship domestic sewage is fast, efficient and complete, stable discharging unfer standard, which compared with ultraviolet light solut ion technology has great advantage;In addition, compared with UV-Fenton oxidation system, without adding the catalyst in UV/H2O2 reaction process, UV/H2O2 system has a series of advantages, such as no sludge produced, simple process,easy to manage and maintenance etc.It has great application value. So we suggested the pilot test on the basis of this paper. |
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