| Activated carbon has high specific surface area and various functional groups.As a highly effective adsorbent,activated carbon is widely used in wastewater treatment.However,it is difficult to recycle and operate continuously in the application process,which leads to high cost.According to the above problem,this paper puts forward to load in made belt with activated carbon adsorbent,and coupled with air flotation technology,through the drive wheel driving cycle,in turn,to complete the continuous adsorption,washing and stripping process,so as to make the activated carbon adsorbent easy to recycle and easy to the whole process of continuous operation,at the same time the use of belt type adsorbent makes it can be directly applied to slurry wastewater treatment system.The research content is divided into the following three aspects:(1)Firstly,activated carbon was successfully made into belt adsorbent,and the influence of pH,ionic strength and initial concentration of crystal violet on the separation effect of adsorption and separation of crystal violet by activated carbon belt was explored.The adsorption and desorption performance of activated carbon belt adsorbent on crystal violet was emphatically investigated.The results showed that the adsorption of activated carbon belt could reach an adsorption equilibrium state within180 min,and the maximum saturated adsorption capacity of activated carbon belt adsorbent reached 2017 mg/m~2.Ethanol with a volume fraction of 70%was used as the desorption agent,the desorption rate could reach 43.13%within 1 min,and the desorption balance could be reached around 10 min,and the equilibrium desorption rate was 59.81%.(2)Second,design and build the intermittent gas belt type activated carbon adsorption separation apparatus,based on activated carbon adsorption with crystal violet dye adsorption separation system and in obtaining the pH,gas flow rate,ionic strength,initial concentration of crystal violet on gas to help belt type activated carbon adsorption separation,on the basis of the influence law of crystal violet,The effectiveness of the method for direct treatment of suspended wastewater and its recovery and regeneration performance were further investigated.The results showed that under the optimized conditions,the removal rate of crystal violet was 99.34%after 120 min when the initial treatment concentration was 40 mg/L and the pH was10.For the suspension system containing 500mg/L mud and 40ppm directly treated,the removal rate can reach 91.42%in 53min and the adsorbent can achieve good separation from the mud particles in the suspension.After 44 cycles,the activated carbon belt adsorbent still showed good adsorption performance.(3)Finally,under the condition of continuous feeding,carried out air flotation,activated carbon adsorption belt,echoing off washing coupling process of the whole process of research,the process parameters of continuous gas help belt type activated carbon adsorption separation process and the influence of the regulation of law,and further examines the feasibility of the method is used for direct continuous suspension wastewater treatment and belt type activated carbon adsorbent recycling performance.The results showed that,under optimized conditions,the designed small-sized full-process gas-assisted adsorption and separation device could continuously treat 40mg/L of simulated crystal violet wastewater,and the removal rate of crystal violet could reach above 94.29%.The continuous treatment capacity was 20 mL/min,and the belt adsorbent was continuously operated for 390 min.After being recycled for about 36 times,the removal rate of crystal violet could still reach 78.98%.The simulated wastewater containing sludge concentration of 500 mg/L was further treated directly,with a continuous treatment capacity of 20 mL/min.The removal rate of crystal violet was up to 93%,and the belt adsorbent could be well separated from the particles in the suspension. |
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