机械转盘联合超声破解剩余污泥

发布时间：2018-08-02 07:56

【摘要】：采用自主设计并制造的机械转盘剩余污泥破解装置对污泥进行破解处理,并联合超声技术以提升破解效果,考察不同运行条件对污泥破解效果的影响,采用响应面法优化处理参数,通过扫描电镜观察破解污泥的细胞形态。实验发现:盘间距离(d)和转盘破解时间(Tm)是影响机械转盘剩余污泥破解液溶解性化学需氧量的增加值(SCOD+)和效能比(EDR)的重要因素;在d=1.5 mm,转速为2300 r·min~(-1)运行条件下破解25 min时SCOD+为3130 mg·L~(-1),破解效果良好。根据Central Composite Design实验设计原理,注重剩余污泥破解的能源利用效率,以SCOD+和EDR为响应指标对机械转盘联用超声破解参数进行优化,当优化条件为d=2.76 mm,Tm=10.89min,Tu(超声处理时间)=17.2 min时,剩余污泥破解液SCOD+=7871.78 mg·L-1,EDR=8.475 mg·L~(-1)·k J~(-1),在相同总处理时间下分别是单独机械转盘法(2610 mg·L~(-1),3.11 mg·L~(-1)·k J~(-1))的3.02倍、2.7倍,单独超声法(3170 mg·L~(-1),3.26 mg·L~(-1)·k J~(-1))的2.48倍和2.6倍。
[Abstract]:In order to improve the cracking effect of sludge, a mechanical turntable surplus sludge cracking device designed and manufactured by ourselves was used to deal with the sludge, and the ultrasonic technology was used to improve the cracking effect. The influence of different operating conditions on the sludge cracking effect was investigated. Response surface method (RSM) was used to optimize the treatment parameters, and the morphology of the sludge was observed by scanning electron microscope (SEM). It was found that the distance between disks (d) and turntable cracking time (Tm) were the important factors affecting the increase of (SCOD) and the efficiency of (EDR) in the solution of residual sludge cracking solution of mechanical turntable. The SCOD is 3130 mg / L ~ (-1) at 25 min at 2300 r / min ~ (-1), and the result is good. According to the experimental design principle of Central Composite Design, the energy utilization efficiency of surplus sludge cracking was emphasized. The ultrasonic cracking parameters of mechanical rotary disk were optimized with SCOD and EDR as the response index. When the optimized conditions were: d = 2.76 mm ~ (-1) ~ (10) ~ (89) min Tu (ultrasonic treatment time) = 17.2 min, The residual sludge cracking liquid SCOD 7871.78 mg L ~ (-1) EDR 8.475mg L ~ (-1) k J ~ (-1) was 3.02 times (2610 mg L ~ (-1) K J ~ (-1) and 2.48 times (3170 mg L ~ (-1) 3.26 mg L ~ (-1) k J ~ (-1) as much as that of single ultrasonic method (3170 mg L ~ (-1) k J ~ (-1) under the same total treatment time, respectively, as much as 2610 mg L ~ (-1) (3.11 mg L ~ (-1) K J ~ (-1) and 2.48 times (3170 mg L ~ (-1) (3.26 mg L ~ (-1) k J ~ (-1).
【作者单位】：东北大学机械工程与自动化学院;
【基金】：国家自然科学基金项目(51178089)~~
【分类号】：X703

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