摘要
通过响应曲面法分析研究Ca(OH)_(2)与介质阻挡放电(dielectric barrier discharge,DBD)等离子体对污泥破解的协同作用,并推测其可能机制。结果表明:仅使用Ca(OH)_(2)破解污泥,投加量在300 mg/g MLSS(混合液悬浮固体)时,得到较好的破解效果,反应60 min后,污泥溶解性化学需氧量(solluted chemical oxigen demand,SCOD)、蛋白质、多糖释放量分别为836.00、296.11、64.21 mg/L;仅使用DBD等离子体处理污泥,破解效果与放电电压、放电时间呈正相关关系。碱协同DBD等离子体破解污泥效果优于单独破解,通过实验和模型预测放电电压10.29 kV,放电时间24 min,碱投加量288.77 mg/g MLSS,碱处理时间60 min为最佳联合破解条件,该条件下SCOD为2021.03 mg/L。推测液相OH-提高了O_(3)氧化能力和效率,同时碱对纤维与脂类的溶解有利于活性物质发挥破壁作用。
On the basis of the single factor test of cracking of sludge by Ca(OH)_(2) and dielectric barrier discharge(DBD)plasma,the response surface method was used to analyze and study the synergistic effect of the two on the sludge.Finally,the possible mechanism of the synergistic effect was speculated.The results show that when only Ca(OH)_(2) is used to crack the sludge with a dosage of 300 mg/g MLSS(mixed liguid suspended solids),a good cracking effect is obtained.After 60 min of reaction,the releases of the solute chemical oxygen demand(SCOD),protein and polysaccharide are respectively 836.00,296.11 and 64.21 mg/L.If only DBD plasma is used to treat sludge,the cracking effect is positively correlated with the discharge voltage and discharge time.The combined effect is better than two separate cracks.There is a significant interaction between the discharge time and the amount of alkali added to the sludge cracking effect.The model predicts a discharge voltage of 10.29 kV,a discharge time of 24 min,and an alkali dose of 288.77 mg/g MLSS with the alkali treatment time of 60 min,the best combined cracking condition,under which the SCOD is 2021.03 mg/L.It is speculated that the presence of liquid OH-improves the oxidizing ability and efficiency of O_(3),and the dissolution of fibers and lipids by alkali easily breaks the wall of the active substance.
作者
杨长河
杨依
刘涛
熊匡
董嘉琦
YANG Chang-he;YANG Yi;LIU Tao;XIONG Kuang;DONG Jia-qi(School of Architecture and Engineering,Nanchang University,Nanchang 330031,China)
出处
《科学技术与工程》
北大核心
2021年第5期2117-2122,共6页
Science Technology and Engineering
基金
江西省科技厅自然科学基金青年基金(2007GZC0075)
江西省教育厅科学技术研究项目([2007]51)。
