Non-thermal plasma generated by dielectric barrier discharge (DBD) was applied to treat emulsified waste liquid.The purpose was to explore purification law of emulsion waste liquid by non-thermal plasma.The influence rule of discharge duration,peak voltage,initial concentration of waste liquid,inorganic salts on COD degradation rate and turbidity removal rate was investigated.It was found that the initial concentration of waste liquid was negatively correlated with the treatment effect.Adding inorganic salt could improve the treatment effect.Increasing discharge time and peak voltage were beneficial to waste liquid treatment.Through orthogonal test,the factors affecting the COD degradation rate of emulsified waste liquid were determined as follows:discharge duration >peak voltage>initial concentration of waste liquid>inorganic salts.The COD highest removal rate of emulsified waste liquid reached 87.46%,when the optimal conditions were as follows:the emulsified cutting waste liquid was prepared according to 1∶200.Adding 0.3000g anhydrous calcium chloride,discharge voltage 30kV,discharge time 4h.Through orthogonal test,the factors affecting the turbidity removal rate of emulsified waste liquid were determined as follows:peak voltage>inorganic salts>initial concentration of waste liquid >discharge duration.The turbidity highest removal rate of emulsified waste liquid reached 93.12%,when the optimal conditions were as follows:The emulsified cutting waste liquid was prepared according to 1∶200.Adding 0.3000g anhydrous calcium chloride,discharge voltage 35kV,discharge time 3.5h.This research provided some basic datas and new theoretical basis for the purification of emulsified waste liquid.
Rong Junfeng, Wei Shijin, Zhang Ye, Li Fuhu
. Study on purification of non-thermal plasma for emulsified waste liquid[J]. New Chemical Materials, 2021
, 49(1)
: 251
-254
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.01.055
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