共查询到17条相似文献,搜索用时 46 毫秒
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从制药厂的活性污泥中分离到一株能以唯一碳源和硫源降解甲硫醚的菌株JLM-8,经过生理生化测试与16S rDNA系统发育树分析鉴定为嗜麦芽寡养单胞菌(Stenotrophomonas maltophilia)。通过测定菌株的生长量、甲硫醚的降解率,利用响应面法优化最佳降解条件,并测定了该菌降解甲硫醚的动力学参数。结果表明:当接种量为25 mg·L-1时,通过响应面法优化的最佳降解条件为温度31.3℃、pH 7.5,初始甲硫醚浓度50 mg·L-1时最大预测降解率为98.2%,实验验证降解率为97.9%。菌株降解动力学参数最大比降解速率、半饱和系数、抑制系数分别为2.37 h-1、143.55 mg·L-1、51.35 mg·L-1,临界抑制浓度为78.46 mg·L-1。 相似文献
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活性炭吸附协同介质阻挡放电降解甲硫醚 总被引:2,自引:0,他引:2
采用活性炭协同介质阻挡放电技术对恶臭物甲硫醚去除进行了研究.结果表明,甲硫醚去除率随着能量密度的提高而上升.在相同能量密度下,等离子体反应器中引入活性炭可以显著提高去除率.当能量密度大于288 J·L-1时,甲硫醚去除率>98%.甲硫醚去除率随着初始浓度和气体流量的增大而降低.本实验中,湿度显著影响甲硫醚在活性炭协同等... 相似文献
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二甲硫醚废气的综合处理技术 总被引:1,自引:0,他引:1
采用活性炭吸附回收和氧化吸收相结合的办法来处理理高浓度二甲硫醚废气,以活性炭为吸附剂,先通过吸附床吸附,然后通过吸收塔以喷淋方式氧化除去少量未被吸附床吸附的二甲硫醚,最后使废气达标排放。将吸附饱和后的活性炭用水蒸气脱附再生,脱附冷却后得到的二甲硫醚回用于生产。 相似文献
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介质阻挡放电低温等离子体降解甲硫醚 总被引:1,自引:1,他引:1
在线-筒式反应器中,应用介质阻挡放电低温等离子体对甲硫醚的降解进行实验研究.采用BPFN型窄脉冲高压电源供电,考察了重复频率、峰值电压、初始浓度、气体流量等单因素对去除率的影响.结果表明,介质阻挡放电能够有效地去除甲硫醚废气.甲硫醚去除率随着重复频率的增加而上升,但能量利用率却降低,本实验中采用重复频率为100 Hz较合适.当气体流量为1000 mL·min-1、初始浓度为906 mg·m-3时,甲硫醚去除率可达100%,此时能量利用率为0.864 mg·kJ-1.当甲硫醚初始浓度为525 mg·L-1,气体流量由1000 mL·min-1增加至2000 mL·min-1时,甲硫醚去除率由100%降低至85.7%,但是能量利用率却由0.706 mg·kJ-1升高至1.210 mg·kJ-1. 相似文献
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微波无极紫外点阵光催化氧化降解酸性蓝BGA的研究 总被引:1,自引:0,他引:1
以不规则石英片作为TiO2光催化剂的载体.与微波无极紫外灯形成点阵光催化氧化降解酸性蓝BGA.通过比较不同反应体系的处理效果,验证了微波无极紫外点阵光催化氧化法的优越性.实验结果表明,当反应时间为60 min、H2O2 投加量2 mL/L、酸性蓝BGA初始质量浓度300 mg/L、曝气量0.15 L/min时,其对酸性蓝BGA废水的TOC去除率和脱色率分别达到42.74%和90.17%.在降解的过程中它受pH影响较大,采用分段控制pH的方法,能够进一步提高脱色效果. 相似文献
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在微波辐照下,采用NaNO2氧化降解壳聚糖,研究了反应时间、反应温度、 NaNO2用量等不同条件对壳聚糖解速率的影响情况。实验结果表明微波辅助能明显促进壳聚糖的降解,适当增加NaNO2用量和提高反应温度均能加快壳聚糖的氧化降解速率。 相似文献
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Hana Žabová Vladimír Církva Milan Hájek 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2009,84(8):1125-1129
BACKGROUND: A continuous‐flow microwave photocatalytic reactor was set up consisting of a glass tube equipped with microwave powered mercury electrodeless discharge lamps (EDLs) coated with thin films of nanoporous titanium(IV) oxide. The effect of operational parameters on photocatalytic degradation of aqueous mono‐chloroacetic acid (MCAA) by a TiO2/UV/MW process was investigated. RESULTS: Studies were carried out at a relatively high concentration of MCAA (0.1 mol L?1), and revealed that reaction temperature and light intensity of the EDLs depend inversely on the flow rate, but that the 366 nm line intensity of EDL is directly proportional to the reaction temperature. The photodegradation of MCAA was enhanced by heating and significantly enhanced by air bubbling of the reaction mixture in the glass reservoir at laboratory temperature. The photocatalytic efficiency increased with the number of titania‐coated EDLs inserted in the glass tube reactor. CONCLUSIONS: It was found that the operational parameters (i.e. flow rate, reaction temperature, number of titania‐coated EDLs, and air bubbling) had important effects on degradation efficiency. The photocatalytic degradation of MCAA on thin films of titanium(IV) oxide in the continuous‐flow microwave photoreactor can be enhanced in the TiO2/UV/MW system. Copyright © 2009 Society of Chemical Industry 相似文献
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Vladimír Církva Stanislav Relich Milan Hájek 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2010,85(2):185-191
BACKGROUND: Low‐pressure batch and continuous‐flow microwave photoreactors were equipped with microwave powered quartz mercury electrodeless discharge lamps (Hg‐EDLs). Photohydrolysis of aqueous mono‐chloroacetic acid (MCAA) into hydroxyacetic acid and HCl was chosen as the model reaction to evaluate these photoreactors. The effects of operational parameters on the MCAA photolysis through a UV/MW process were investigated. RESULTS: Studies were carried out at relatively high MCAA concentration (0.1 mol L?1). The photoreaction course was monitored by the pH change in the solution. The MCAA conversion was optimized as a result of a trade‐off between the thermal dependence of the photochemical quantum yield (which increases with increasing temperature) and the thermal dependence of the EDL light intensity of 254 nm line (which increases with decreasing temperature). The microwave photoreactors made it possible to study the temperature dependence of MCAA photohydrolysis. CONCLUSION: It was found that operational parameters (i.e. reaction temperature, quantum yield) had important effects on photoefficiency. Photohydrolysis of MCAA in the microwave photoreactors can be enhanced by the UV/MW system. The results of conversions (in 120 min) for the particular photoreactor set‐ups show that the best reaction conditions for MCAA photolysis were obtained in the low‐pressure batch microwave photoreactor (the conversion was 46% at 80 °C). Copyright © 2009 Society of Chemical Industry 相似文献