放电等离子体水处理技术是一种新型的高级氧化技术，具有处理条件温和，效率高、无选择性、无二次污染等诸多优点。首先利用放电等离子体水处理技术对难降解的有机废水进行预处理，分解破坏其中的难降解有机大分子，然后利用经济高效的生物处理方法处理，如此结合放电等离子体水处理技术与生物水处理技术的优势，达到更加高效彻底地处理难降解有机废水。研究了双极性高压脉冲放电等离子体作用下，气液固三相混合体等离子体反应器中四溴双酚A(TBBPA)的降解规律与机理。考察了放电电压峰值、填料球粒径、气体流量、溶液电导率、初始浓度、TiO2催化剂等对TBBPA降解规律的影响。实验结果表明双极性脉冲放电等离子体系统对TBBPA具有较好的降解特性，降解效率高，降解过程中溶液由无色透明变为棕黄色。在峰值电压为32kV，填料球粒径为5mm，气量为1.0m3/h时，初始浓度为100mg/L的 TBBPA溶液在放电处理20分钟后，TBBPA基本被降解完全。放电电压越高，降解效果越好；气量由0.2m3/h增加到1.0m3/h时，TBBPA的去除速率增大而；填料球粒径由5mm增加到9mm时，TBBPA的去除速率减小；TBBPA初始浓度的升高，对其降解速率影响不大；而溶液的电导率升高明显降低TBBPA的降解速度。TiO2光催化剂能够明显提升放电等离子体对TBBPA的降解效果。等离子体作用下TBBPA的降解包含分解断链与脱溴环节。活性污泥法中微生物能够分解利用经过放电等离子体预处理后的四溴双酚A废水中的有机物，而基本不能直接分解利用TBBPA分子，从分子级证实了等离子体联合生物降解有机废水的优势。研究了双极性高压脉冲放电等离子体联合生物对实际印染废水的处理效果。首先测定了不同参数下经放电等离子体处理后实际印染废水化学需氧量（COD）和五日生化需氧量（BOD5）的变化，考察了放电等离子体对实际印染废水可生化的影响。结果表面：放电电压峰值是影响实际印染废水COD、BOD5以及可生化性的关键因素；而填料球粒径、气体流量、TiO2光催化剂等对放电等离子体处理实际印染废水的效果影响不大。稀释原印染废水后，放电等离子体处理效果更佳。活性污泥法处理放电等离子体预处理后的实际印染废水时，其COD值下降幅度更大。证实放电等离子体联合生物降解实际有机废水具有良好优势。
Water treatment by discharge plasma is a new type of advanced oxidation technology which has mild processing conditions, high efficiency, nonselective and no secondary pollution, and many other advantages. The "discharge plasma + biodegradation" treatment process can firstly take full use of discharge plasma to destroy the nonbiodegradable organic polymer in wastewater, then use the economic and efficient biodegradation to completely decompose organic wastewater, so combination of the advantages of discharge plasma water treatment technology and biodegradation can achieve a more efficient and thorough treatment for nonbiodegradable organic wastewater. Degradation and its mechanism of tetrabromobisphenol A (TBBPA) in the gas-liquid-solid three-phase mixture plasma reactor by bipolar pulse discharge plasma have been investigated. Studied the effects of voltage, diameter of glass beads, air flow rate, the conductivity of the solution, the initial concentration, and TiO2 catalyst on the degradation of TBBPA. Experimental results show that the bipolar pulsed discharge plasma system has better effect on the degradation of TBBPA high efficiency degradation, and the color of the TBBPA solution varied from colorless transparent to brownish-yellow with the discharge process. Almost all the TBBPA was converted into other intermediates after 20min discharge treatment under the condition of 32kV peak voltage, 1.0m3/h air flow and 9mm diameter glass beads. Degradation rate of TBBPA increased with the increase of applied voltage. Removal rates of TBBPA increased when air flow varied from 0.2m3/h to 1.0m3/h. While glass beads diameter varied from 5mm to 9mm, removal rates of TBBPA decreased. The initial concentration of TBBPA has little effect on its removal rates. Increase the conductivity of the solution would significantly reduce the degradation rate of TBBPA. Titania(TiO2) photocatalyst had a significantly enhancement on the degradation of TBBPA in the bipolar pulsed discharge plasma system. Degradation of TBBPA in the plasma system contained decomposition process and debromination. The single biodegradation basically cannot direct decompose TBBPA molecule while "discharge plasma + biodegradation" treatment process can thoroughly decompose organic matter in the TBBPA wastewater pretreated by bipolar discharge plasma. It confirmed the advantages of discharge plasma joint biodegradation for organic polymer pollutant.The effect of bipolar pulse discharge plasma combined with biodegradation on degradation of actual dyeing wastewater was studied. Firstly, the variation of chemical oxygen demand (COD) and five-day biochemical oxygen demand (BOD5) of actual dyeing wastewater treated by bipolar discharge plasma under different parameters were measured. Secondly, the effect of bipolar discharge plasma on the biodegradability of actual dyeing wastewater was investigated. Results showed that the voltage was the key factors affecting COD, BOD5, and biodegradability of actual dyeing wastewater while diameter of glass beads, air flow rate, TiO2 photocatalyst had little effect on the degradation of actual dyeing wastewater. Discharge plasma had better effect on while diluting the original actual dyeing wastewater. When using activated sludge method to decompose actual dyeing wastewater pretreated by bipolar discharge plasma, the COD of it declined more compared with no pretreated. It confirmed that the discharge plasma joint biodegradation had good advantages on the actual organic wastewater treatment.
