Chlorine dioxide/ultrasonic wave-coupled excess sludge decrement pretreating method
A chlorine dioxide and excess sludge technology, applied in water/sludge/sewage treatment, sludge treatment, sludge oxidation treatment, etc., can solve the problems of high energy consumption and low efficiency of excess sludge, and achieve energy saving. The effect of reducing power consumption, strengthening the degree and effect of cracking, and reducing processing costs
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Embodiment 1
[0021] SBR pilot test system (sequential batch activated sludge process) of a sewage treatment plant in Foshan City, the main device is a 1.5×1.2×0.9m SBR reactor with an effective volume of 1260L, and the operation cycle is 8 hours in total, divided into 5 stages: water inflow (0.5h), aeration (4h), sedimentation (1.5h), drainage (0.5h), idle (1.5h). Discharge mud about 135-200g per cycle. After testing, the properties of the remaining sludge are as follows: the sludge concentration is about 10-20g / L, the soluble COD is 30.02mg / L, the TN is 13.44mg / L, the TP is 2.01mg / L, and the pH is 7.8. Take 1L of sludge liquid in a container, add chlorine dioxide at 2 mg / g of dry sludge, stir with an electromagnetic stirrer, and react for 1 hour under stirring at a speed of 60 r / min, and then perform ultrasonic treatment in an ultrasonic cell pulverizer at an ultrasonic frequency of 20 ~40kHz, ultrasonic sound energy density 0.5W / mL, ultrasonic time 2min. After treatment, the soluble CO...
Embodiment 2
[0023] The SBR pilot system of a sewage treatment plant in Foshan City, the main device is a 1.5×1.2×0.9m SBR reactor, the effective volume is 1260L, the operation cycle is 8 hours, and it is divided into 5 stages: water intake (0.5h), aeration (4h ), sedimentation (1.5h), drainage (0.5h), idle (1.5h). Discharge mud about 135-200g per cycle. After testing, the properties of the remaining sludge are as follows: the sludge concentration is about 10-20g / L, the soluble COD is 25.6mg / L, the TN is 12.5mg / L, the TP is 1.46mg / L, and the pH is 7.05. Take 1L of sludge liquid in a container, add chlorine dioxide at a rate of 4 mg / g dry sludge, stir with an electromagnetic stirrer, and react for 1 hour under stirring at a speed of 80 r / min, and then perform ultrasonic treatment in an ultrasonic cell pulverizer at an ultrasonic frequency of 20 ~40kHz, ultrasonic sound energy density 0.5W / mL, ultrasonic time 6min. After treatment, the soluble COD of the supernatant increased by 787.5%, TN...
Embodiment 3
[0025] The SBR pilot system of a sewage treatment plant in Foshan City, the main device is a 1.5×1.2×0.9m SBR reactor, the effective volume is 1260L, the operation cycle is 8 hours, and it is divided into 5 stages: water intake (0.5h), aeration (4h ), sedimentation (1.5h), drainage (0.5h), idle (1.5h). Discharge mud about 135-200g per cycle. After testing, the properties of the remaining sludge are as follows: the sludge concentration is about 10-20g / L, the soluble COD is 20.15mg / L, the TN is 19.53mg / L, the TP is 3.41mg / L, and the pH is 7.21. Take 1L of sludge liquid in a container, add chlorine dioxide at 2 mg / g of dry sludge, stir with an electromagnetic stirrer, and react for 1 hour under stirring at a speed of 60 r / min, and then perform ultrasonic treatment in an ultrasonic cell pulverizer at an ultrasonic frequency of 20 ~40kHz, ultrasonic sound energy density 1W / mL, ultrasonic time 4min. The soluble COD in the treated sludge increased by 1093.67%, TN increased by 112.6...
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