RDT-8阻燃剂生产废水处理技术研究
发布时间：2018-09-03 15:12
【摘要】：三(三溴苯基)三嗪是一种高效的溴系阻燃剂,简称RDT-8,在其生产过程中,会产生一系列的废水,废水的成分较为复杂,主要含有的污染物为三溴苯酚和N,N-二甲基甲酰胺(DMF)。本课题以RDT-8阻燃剂生产过程中产生的蒸馏离心水、溴化水洗水和混合废水为主要的研究对象,采用酸化沉淀法、大孔树脂吸附法、活性炭吸附等多种方法对这些废水进行处理,研究各种方法对各股废水中COD和三溴苯酚的去除效果,并得出实验室小试时相应的最佳工艺条件,为废水的中试及工程设计提供依据。在处理实际废水的同时,对DMF人工配水进行研究,采用碱性水解法、生化法及活性炭吸附进行处理,得出各种方法的最佳工艺条件,为实际DMF废水的处理提供依据。本文对RDT-8阻燃剂生产过程中产出的各股废水进行水质分析,确认废水中COD的组成,为达到《山东省半岛流域水污染综合排放标准》(DB37/676-2007)中其他排污要求的一级标准—100mg/L,采用物理、化学、生物等方法进行处理。对于RDT-8蒸馏离心水,采用酸化沉淀法和HZ-16大孔吸附树脂处理效果良好。酸化沉淀法最佳的反应pH值为1.9,HZ-16大孔吸附树脂在流速为4BV/h时,经过150BV后,能对废水的COD和三溴苯酚有良好的去除能力,处理后废水COD能达到项目目标的100mg/L以下。对于RDT-8溴化水洗水,采用酸化沉淀法、HZ-16大孔吸附树脂吸附和空气氧化法处理效果良好。酸化沉淀法最佳的反应pH值为2,HZ-16大孔吸附树脂吸附三溴苯酚效果良好,而空气氧化法能将溴化水洗水中的部分有机物去除,但处理后废水COD不能达到项目目标的100mg/L以下,需要和其他废水一起进行处理。对于RDT-8混合废水,采用酸化沉淀法、HZ-16大孔吸附树脂吸附、活性炭吸附和Fenton氧化法处理效果良好。酸化沉淀法最佳pH值为3,HZ-16大孔吸附树脂在流速为4BV/h时,经过250BV后,能对废水的COD和三溴苯酚有良好的去除能力,活性炭在树脂出水后能有效的吸附废水中的DMF,Fenton氧化法最佳工艺为：反应pH值为3,反应时间为2h,m(FeSO4·7H2O)=6g/L, V(30%H2O2)=2mL/L。对于DMF人工配水,生化法对废水的COD有较好的去除效果；碱性水解法在NaOH投加量为60g/L,气水比为180：1时对DMF有较好的去除能力；活性炭对DMF有较好的吸附效果,吸附饱和的活性炭可采用200℃热空气再生。
[Abstract]:Tris (tribromophenyl) triazine is an efficient brominated flame retardant. In the production of RDT-8, a series of wastewater is produced. The main pollutants are tribromophenol and N-dimethylformamide (DMF). In this paper, the distilled centrifugal water, brominated water washing water and mixed wastewater produced in the production of RDT-8 flame retardant were taken as the main research objects. The wastewater was treated by acidified precipitation method, macroporous resin adsorption method, activated carbon adsorption and so on. The removal efficiency of COD and tribromophenol from waste water by various methods was studied, and the optimum technological conditions were obtained, which provided the basis for the pilot test and engineering design of wastewater. At the same time, the artificial water distribution of DMF was studied. Alkaline hydrolysis method, biochemical method and activated carbon adsorption were used to treat the wastewater. The optimum technological conditions of various methods were obtained, which provided the basis for the treatment of actual DMF wastewater. In this paper, the water quality of each unit of wastewater produced during the production of RDT-8 flame retardant is analyzed, and the composition of COD in the wastewater is confirmed. In order to meet the first class standard -100 mg / L of other discharge requirements in Shandong Peninsula Basin Water pollution Integrated discharge Standard (DB37/676-2007), physics is used. Chemical, biological and other methods for treatment. For RDT-8 distilled centrifugal water, acidified precipitation method and HZ-16 macroporous adsorption resin were used to treat the water. The optimum reaction pH value of acidizing precipitation method is 1.9 ~ (9) HZ-16 macroporous adsorption resin. When the flow rate is 4BV/h, after 150BV, the COD and tribromophenol of wastewater can be removed well. After treatment, the COD of wastewater can reach the 100mg/L of the project objective. For RDT-8 brominated water, the adsorption of HZ-16 macroporous resin by acidizing precipitation method and air oxidation treatment were good. The optimum reaction pH value of acidified precipitation method is 2? HZ-16 macroporous adsorption resin to adsorb tribromophenol, while air oxidation method can remove some organic matter from brominated water, but the COD of treated wastewater can not reach the target 100mg/L of the project. It needs to be treated with other waste water. For RDT-8 mixed wastewater, HZ-16 macroporous resin was adsorbed by acidified precipitation method, activated carbon adsorption and Fenton oxidation were used to treat the wastewater. The optimum pH value of acidizing precipitation method is 3? HZ-16 macroporous adsorption resin. When the flow rate is 4BV/h, the COD and tribromophenol of wastewater can be removed well after 250BV. The best process for DMF,Fenton oxidation of activated carbon in wastewater adsorbed after resin effluent is as follows: the reaction pH value is 3, the reaction time is 2hm (FeSO4 7H2O) 6g / L, V (30%H2O2) is 2ml / L. For artificial water distribution of DMF, biochemistry has a better removal effect on COD in wastewater, alkaline hydrolysis has a better removal capacity for DMF when the dosage of NaOH is 60 g / L, ratio of gas to water is 180: 1, activated carbon has a better adsorption effect on DMF. The activated carbon with adsorption saturation can be regenerated by hot air at 200 鈩，
本文编号：2220348
[Abstract]:Tris (tribromophenyl) triazine is an efficient brominated flame retardant. In the production of RDT-8, a series of wastewater is produced. The main pollutants are tribromophenol and N-dimethylformamide (DMF). In this paper, the distilled centrifugal water, brominated water washing water and mixed wastewater produced in the production of RDT-8 flame retardant were taken as the main research objects. The wastewater was treated by acidified precipitation method, macroporous resin adsorption method, activated carbon adsorption and so on. The removal efficiency of COD and tribromophenol from waste water by various methods was studied, and the optimum technological conditions were obtained, which provided the basis for the pilot test and engineering design of wastewater. At the same time, the artificial water distribution of DMF was studied. Alkaline hydrolysis method, biochemical method and activated carbon adsorption were used to treat the wastewater. The optimum technological conditions of various methods were obtained, which provided the basis for the treatment of actual DMF wastewater. In this paper, the water quality of each unit of wastewater produced during the production of RDT-8 flame retardant is analyzed, and the composition of COD in the wastewater is confirmed. In order to meet the first class standard -100 mg / L of other discharge requirements in Shandong Peninsula Basin Water pollution Integrated discharge Standard (DB37/676-2007), physics is used. Chemical, biological and other methods for treatment. For RDT-8 distilled centrifugal water, acidified precipitation method and HZ-16 macroporous adsorption resin were used to treat the water. The optimum reaction pH value of acidizing precipitation method is 1.9 ~ (9) HZ-16 macroporous adsorption resin. When the flow rate is 4BV/h, after 150BV, the COD and tribromophenol of wastewater can be removed well. After treatment, the COD of wastewater can reach the 100mg/L of the project objective. For RDT-8 brominated water, the adsorption of HZ-16 macroporous resin by acidizing precipitation method and air oxidation treatment were good. The optimum reaction pH value of acidified precipitation method is 2? HZ-16 macroporous adsorption resin to adsorb tribromophenol, while air oxidation method can remove some organic matter from brominated water, but the COD of treated wastewater can not reach the target 100mg/L of the project. It needs to be treated with other waste water. For RDT-8 mixed wastewater, HZ-16 macroporous resin was adsorbed by acidified precipitation method, activated carbon adsorption and Fenton oxidation were used to treat the wastewater. The optimum pH value of acidizing precipitation method is 3? HZ-16 macroporous adsorption resin. When the flow rate is 4BV/h, the COD and tribromophenol of wastewater can be removed well after 250BV. The best process for DMF,Fenton oxidation of activated carbon in wastewater adsorbed after resin effluent is as follows: the reaction pH value is 3, the reaction time is 2hm (FeSO4 7H2O) 6g / L, V (30%H2O2) is 2ml / L. For artificial water distribution of DMF, biochemistry has a better removal effect on COD in wastewater, alkaline hydrolysis has a better removal capacity for DMF when the dosage of NaOH is 60 g / L, ratio of gas to water is 180: 1, activated carbon has a better adsorption effect on DMF. The activated carbon with adsorption saturation can be regenerated by hot air at 200 鈩，
本文编号：2220348
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