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241.
针对太湖流域某复合污染型支浜阳台排放洗涤废水经雨水管道直接排河产生的污染问题,在雨水排放口上游设置溢流井,收集污水,提升至交替曝气生物滤池一体化设备,处理后排入河中,在工程稳定运行数月后,研究该技术处理效能、工艺优化方式和技术特色。综合评估表明:该处住宅阳台洗涤废水碳源浓度较低,但是即使C/N3·(m2·d)-13种水力负荷下氨氮容积负荷的变化均与氨氮去除率变化趋势一致;用normfit函数对3种水力负荷长期运行时氨氮出水浓度进行预测,结果表明平均出水浓度的区间估计均在0.79~2.18 mg·L-1较低浓度之间,且置信度均接近1,说明工程可在较大水力负荷下运行。周期内水质连续监测的结果表明,切换曝气方向后出水水质下降的延续时间为30 min,相应时段出水应进行回流处理。 相似文献
242.
通过对环境胁迫因子参数的不同设定,对固定菌修复污染土壤效果进行了研究.结果显示,当环境胁迫因子温度(高温40 ℃和低温15 ℃)、酸碱度(pH=4和pH=9)及重金属(Cd和Pb)存在时,对固定菌降解污染物的影响并不大,而游离菌降解率却有一定的下降趋势.进一步观察了固定化载体内部微观结构,为固定菌用于有机污染土壤的异位修复提供了一定的理论基础. 相似文献
243.
Xiangjie Gong Yanchun Lin Xiaodong Li Angjian Wu Hao Zhang Jianhua Yan 《Journal of the Air & Waste Management Association (1995)》2020,70(2):138-157
ABSTRACTThis work provides a systematic review on the decomposition of volatile organic pollutants in flue gas through the gliding arc (GA) plasma technology. To begin with, the basic mechanisms of GA plasma generation are summarized and three characteristic stages existed during the GA plasma generation process are revealed: gas breakdown stage, equilibrium stage, and non-equilibrium stage. Then, the types of GA reactors are comparatively illustrated. Possible destruction mechanisms of volatile organic compounds (VOCs) by GA plasma are discussed by taking chloroform, benzene, and methanol as examples. Furthermore, the effects of many operating parameters on the VOCs destruction efficiency are comprehensively analyzed. Simultaneously, the product distribution, energy cost, technical and economic during the whole decomposition process are considered. Finally, the advantages and disadvantages of GA plasma and its further development trend are concluded from the academic and industrial application of GA plasma in VOCs decomposition.Implications: This paper comprehensively describes the principle, characteristics, research progress and engineering application examples of the degradation of volatile organics by gliding arc discharge plasma, so that readers can fully understand the degradation of volatile organics by gliding arc discharge plasma and provide theoretical basis for the industrial application of the degradation of volatile organics by gliding arc discharge plasma. 相似文献
244.
245.
Changming Du Xiangjie Gong Yanchun Lin 《Journal of the Air & Waste Management Association (1995)》2019,69(8):879-899
This paper explores the application of corona plasma technology as a tool in treatment of volatile organic compounds (VOCs). The review introduces the principle of corona discharge and describes the characteristics of plasma, especially of various corona plasma reactors. By summarizing the main features of such reactors, this paper provides a brief background to different power sources and reactor configurations and their application to VOC treatment design. Considering chlorinated compounds, benzene series and sulfur compounds, this paper reveals the probable mechanism of corona plasma in VOC degradation. Additionally, the effects of numerous technical parameters – such as reactor structure, shape and materials of electrodes, and humidity – are analyzed comprehensively. Product distribution, energy efficiency and economic benefits are invoked as factors to evaluate the performance of VOC degradation. Finally, the practical application of corona plasma and its advantages are briefly introduced. The review aims to illustrate the enormous potential of corona plasma technology in the treatment of VOCs, and identifies future directions.
Implications: This paper comprehensively describes the principle, characteristics, research progress and engineering application examples of the degradation of volatile organics by corona discharge plasma, to provide a theoretical basis for the industrial application of this process. 相似文献
246.
以乙二胺(EDA)还原氧化石墨烯(GO)制得一种吸附剂材料,即还原态氧化石墨烯(RGO)。考察了动态条件下Cd2+溶液的初始浓度、流速及吸附床高度对穿透曲线的影响,同时利用Bed-Depth-Service Time(BDST)模型对吸附床高度与穿透时间的关系进行线性拟合分析,研究了RGO对Cd2+溶液的动态吸附性能。结果表明,RGO可以有效地去除水溶液中的Cd2+,随着吸附床高度的增加,离子的去除率增大,穿透时间延长;当溶液初始浓度增大时穿透时间缩短,离子的去除率减小;而溶液的流速加快,穿透时间和去除率都相应减小。吸附床高度与穿透时间的关系可用BDST模型较好地进行描述,预测新的操作条件下的穿透时间与实验值误差均小于5%。 相似文献
247.
NaOH预处理对杂交狼尾草厌氧发酵产沼气的影响 总被引:1,自引:0,他引:1
研究了NaOH预处理对杂交狼尾草厌氧消化制沼气的影响。采用质量分数分别为0%、2%、4%、6%和8%的NaOH溶液对杂交狼尾草进行碱预处理,在中温(35℃) 、TS质量分数6%、接种率20%及初始pH为7.0条件下,进行厌氧发酵实验。对比了处理前后原料木质纤维素含量,探讨了不同浓度预处理对发酵过程沼气产量、甲烷浓度、pH以及产气速率的影响。结果表明,NaOH预处理有助于提高杂交狼尾草厌氧发酵的产气量和产气速率,其中4%NaOH预处理为较优条件。经4% NaOH溶液常温浸润24 h后,杂交狼尾草木质素降解率最大,比未处理实验组提高了31.2%;厌氧发酵总产气量比未处理实验组提高了31.6%。 相似文献
248.
249.
Jia Ming Teng Miaomiao Tian Sinuo Yan Jin Meng Zhiyuan Yan Sen Li Ruisheng Zhou Zhiqiang Zhu Wentao 《Environmental science and pollution research international》2021,28(32):43476-43482
Environmental Science and Pollution Research - PEN is a widely used triazole fungicide, usually used to control grape white rot. In the process of agricultural use, PEN will be scattered to the... 相似文献
250.
Lyu Yucai Yang Tao Liu Herong Qi Zheng Li Ping Shi Ziyao Xiang Zhen Gong Dachun Li Ning Zhang Yaoping 《Environmental science and pollution research international》2021,28(16):19866-19877
Environmental Science and Pollution Research - Chromium (Cr) is one of the most widely used heavy metals in industrial processes, resulting in water and soil pollution that seriously threaten... 相似文献