【摘要】：三(三溴苯基)三嗪是一種高效的溴系阻燃劑,簡稱RDT-8,在其生產過程中,會產生一系列的廢水,廢水的成分較為復雜,主要含有的污染物為三溴苯酚和N,N-二甲基甲酰胺(DMF)。本課題以RDT-8阻燃劑生產過程中產生的蒸餾離心水、溴化水洗水和混合廢水為主要的研究對象,采用酸化沉淀法、大孔樹脂吸附法、活性炭吸附等多種方法對這些廢水進行處理,研究各種方法對各股廢水中COD和三溴苯酚的去除效果,并得出實驗室小試時相應的最佳工藝條件,為廢水的中試及工程設計提供依據。在處理實際廢水的同時,對DMF人工配水進行研究,采用堿性水解法、生化法及活性炭吸附進行處理,得出各種方法的最佳工藝條件,為實際DMF廢水的處理提供依據。本文對RDT-8阻燃劑生產過程中產出的各股廢水進行水質分析,確認廢水中COD的組成,為達到《山東省半島流域水污染綜合排放標準》(DB37/676-2007)中其他排污要求的一級標準—100mg/L,采用物理、化學、生物等方法進行處理。對于RDT-8蒸餾離心水,采用酸化沉淀法和HZ-16大孔吸附樹脂處理效果良好。酸化沉淀法最佳的反應pH值為1.9,HZ-16大孔吸附樹脂在流速為4BV/h時,經過150BV后,能對廢水的COD和三溴苯酚有良好的去除能力,處理后廢水COD能達到項目目標的100mg/L以下。對于RDT-8溴化水洗水,采用酸化沉淀法、HZ-16大孔吸附樹脂吸附和空氣氧化法處理效果良好。酸化沉淀法最佳的反應pH值為2,HZ-16大孔吸附樹脂吸附三溴苯酚效果良好,而空氣氧化法能將溴化水洗水中的部分有機物去除,但處理后廢水COD不能達到項目目標的100mg/L以下,需要和其他廢水一起進行處理。對于RDT-8混合廢水,采用酸化沉淀法、HZ-16大孔吸附樹脂吸附、活性炭吸附和Fenton氧化法處理效果良好。酸化沉淀法最佳pH值為3,HZ-16大孔吸附樹脂在流速為4BV/h時,經過250BV后,能對廢水的COD和三溴苯酚有良好的去除能力,活性炭在樹脂出水后能有效的吸附廢水中的DMF,Fenton氧化法最佳工藝為：反應pH值為3,反應時間為2h,m(FeSO4·7H2O)=6g/L, V(30%H2O2)=2mL/L。對于DMF人工配水,生化法對廢水的COD有較好的去除效果；堿性水解法在NaOH投加量為60g/L,氣水比為180：1時對DMF有較好的去除能力；活性炭對DMF有較好的吸附效果,吸附飽和的活性炭可采用200℃熱空氣再生。
[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，

本文編號：2220348