臭氧在污泥预处理中的应用研究   总被引：3，自引：0，他引：3  

王兴华  何若平  吴菁芃  周华  韦萍 《中国沼气》2010,28(2):27-29

采用臭氧氧化法对活性污泥进行预处理。通过单因素试验考察了臭氧添加对污泥TCOD,SCOD,VS,TS的影响,并以污泥厌氧发酵产气量为考察指标,筛选出最佳预处理工艺。研究表明,经0.25 gO3.gVS-1臭氧处理后的污泥TCOD降低了1800 mg.L-1,SCOD上升了400 mg.L-1,VS平均上升了20%,TS平均降低了2.5%,产气量较未处理增加了250%。  相似文献   

Lethal doses of ozone for control of all stages of internal and external feeders in stored products     

Hansen LS  Hansen P  Jensen KM 《Pest management science》2012,68(9):1311-1316

BACKGROUND: Gaseous ozone (O₃) has potential for control of insects in stored grain. Previous studies have focused on freely exposed insects. Immatures of internal pests (e.g. Sitophilus spp. and most stages of Rhyzopertha dominica F.) are protected within kernels and probably require higher doses and/or longer treatment times for full control. A laboratory study determined the doses of ozone necessary for full control of freely exposed and internal stages of eleven stored‐product pest species. Test insects were three species of Sitophilus, R. dominica, Tribolium confusum Jacquelin du Val, T. castaneum Herbst, Plodia interpunctella Hübner, Sitotroga cerealella Olivier, Oryzaephilus surinamensis L., Ephestia kuehniella Zeller and Stegobium paniceum L. Insects were exposed to continuous flows of ozone in doses of 10–135 ppm and exposure times of 5–8 days. Dose‐mortality bioassays were conducted on three species of Sitophilus and P. interpunctella. RESULTS: Freely exposed stages (with a few exceptions) were controlled with 35 ppm of ozone for 6 days. Full mortality of internal stages within kernels required exposure to 135 ppm for 8 days. CONCLUSION: This study confirms that higher doses and/or longer treatment times are necessary for control of internal stages of stored‐product pests. Copyright © 2012 Society of Chemical Industry  相似文献   

臭氧氧化猪场处理尾水对苦草(Vallisneria spiralis)抗氧化系统的影响     

王俊力  陈桂发  刘福兴  宋祥甫  邹国燕 《农业环境科学学报》2016,35(12):2299-2305

为了探索臭氧氧化技术应用于畜禽养殖废水排放前的预处理对环境可持续发展的影响,用不同浓度臭氧氧化处理经生化工艺处理后的猪场尾水,以苦草为试验材料,从活性氧代谢和抗氧化系统的角度,探讨了沉水植物在臭氧氧化猪场处理尾水中的适应性以及臭氧氧化技术的应用对水生植物的影响。结果表明:与未经臭氧氧化处理相比,臭氧氧化后(AO1 10 mg·L~(-1)、AO2 30 mg·L~(-1)、AO3 50 mg·L~(-1))猪场处理尾水中苦草的过氧化氢(H_2O_2)含量有升高趋势;AO2处理中苦草的抗坏血酸(AsA)-谷胱甘肽(GSH)循环对H_2O_2调节起重要作用,苦草的抗坏血酸过氧化物酶(APX)活性、AsA和GSH含量增加,从而使生物量增加;AO3处理中苦草AsA含量降低,H_2O_2与抗氧化物质之间没有达到平衡,从而使生物量降低。结果显示,试验条件下,30 mg·L~(-1)的臭氧氧化应用于猪场处理尾水,能增强沉水植物的抗氧化系统,促进生长,从而对水生生态系统有调节作用。  相似文献