臭氧、超声与生物质组合调理污泥脱水性能研究

Study on the Sludge Dewatering with Ozone,Ultrasound,Biomass and Their Combination Process

以某石化公司污水处理厂的污泥作为研究对象，污泥滤饼含水率、比阻和沉降比作为判别指标，探究臭氧、超声和生物质3种方式，单一及组合调理污泥脱水性能的影响。结果表明：超声处理污泥，滤饼含水率在77．60％～84．28％波动，当超声时间为150s时，滤饼含水率最低且比阻值最小，达到6．30×10^8S2·g-1臭氧氧化处理污泥，滤饼含水率先降后增，污泥比阻的波动趋势与含水率一致，当臭氧投加量为0．03g·g-1时，滤饼含水率达到77．36％，比阻值达到4．53×10^8S·g-1投加适量的生物质能促进污泥脱水性能，当质量比为1：3．5时，污泥含水率和比阻值均达到最低，分别为77．1％和5．19×10^8S2·g-1；臭氧-超声-生物质组合调理，能大幅提升污泥脱水性能，最佳组合调理参数为：臭氧投加量0．03g·g-1，超声时间60s、生物质投机量3．0g，此时，污泥滤饼含水率下降到57．91％，比阻值为1．13×10^8S2·g-1。臭氧、超声和生物质具有较好的协同增效作用，组合联用能有效破坏污泥内部菌体结构，防止污泥团聚，提高污泥脱水性能。

Taking the sludge in sewage treatment plant of Petrochemical Corporation as the research target, this essay aims to investigate the impact of a combined conditioning of ozone, ultrasonic and biomass on sludge dewatering performance using moisture content, specific resistance and settlement ratio of sludge as discriminative index. It is implicated by the research that with the time increased for ultrasonic treatment, the moisture ratio of sludge filter cake fluctuates between 77.60%--84.28%, and it reaches to the lowest moisture ratio and lowest specific resistance （6.30 X 108 Sz ~ g-l） when the time of ultrasonic treatment is around 150 s. With an increase of dosage of ozone, the moisture ratio of sludge filter cake first increases then descends. The fluctuation tendency of specific resistance is in accordance with moisture ratio. The moisture ratio and specific resistance of sludge reache to 77.36% and 4.53 × 10^8 S2 . g-1 respectively when the dosage of ozone is 0.03g . g- 1. After adding biomass, the moisture ration and specific resistance drop to 57.91% and 1.13×108 S2 .g- 1 respectively with the combined conditioning. In sludge moisture ratio leads to a reduction of over 20%. In order to promote sludge dewatering and crack the interior bacterial structure of sludge effectively, the optimal conditioning parameters are. ozone oxidation l Omin; ultrasonic treatment 60s biomass dosage 3.0g.