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1.
超声波对垃圾渗滤液COD和氨氮去除的研究   总被引:2,自引:0,他引:2  
摘要:试验采用超声波作用去除垃圾渗滤液中COD和氨氮。通过正交设计,探讨了活性炭用量、pH值、超声波功率、辐照时间、曝气时间5个因素对COD和氨氮去除率的影响。结果表明在活性炭用量1.0g,pH为9,超声波强度为360W,辐照时间为6min,曝气时间为6min时处理COD和氨氮综合去除效果最好,COD去除率为63.7%,氨氮去除率为80.24%。  相似文献   

2.
生物质炭对垃圾渗滤液中氨氮去除效果的研究   总被引:4,自引:2,他引:2  
为了寻找经济、有效的氨氮吸附材料,为物化处理技术在垃圾渗滤液上的运用提供一些实际参考的选择,以生物质炭(木炭)作为吸附材料进行吸附试验,研究木炭投加量、渗滤液初始pH值、吸附时间、氨氮浓度4个因数变化的条件下,木炭对垃圾渗滤液中氨氮的去除率及其吸附动力学特征。结果表明:随着木炭用量的增加,木炭对氨氮的吸附量逐渐增大,木炭投加量为80~160 g/L时,渗滤液中氨氮的去除率达34.27%~39.41%。在最佳pH 10和最佳吸附时间240 min条件下,木炭对渗滤液中氨氮的去除率分别为24.21%、16.91%。木炭对垃圾渗滤液的氨氮有一定的去除效果,其吸附动力学特征符合伪二级动力学方程和颗粒内扩散方程。  相似文献   

3.
响应面法优化电解芬顿协同法深度处理老龄垃圾渗滤液   总被引:3,自引:0,他引:3  
采用电解芬顿法深度处理老龄垃圾渗滤液,选取电量、进水pH值、进水氨氮浓度3个因素为变量,CODCr去除率为响应值进行Box-Behnken中心组合设计。利用响应面法对试验结果进行分析,建立了CODCr去除率为响应值的二阶多项式模型并进行了方差分析和显著性检验,通过解模型逆矩阵得到最佳条件:单位面积电量为23.26 Ah/dm 2、pH值为3.58、进水氨氮浓度56.78 mg/L。在最佳条件下,CODCr去除率为96.5%,与模型预测值偏差为4.45%,吻合度较高。对电解芬顿深度处理前后的渗滤液进行GC-MS分析,表明电解芬顿协同处理技术能有效降解垃圾渗滤液中难生化降解的有机物,将有机物种类从42种降低至21种,是较有效的深度处理技术。  相似文献   

4.
应用臭氧—活性炭联用技术处理食品厂废水的探究   总被引:3,自引:0,他引:3  
采用臭氧—活性炭联用技术对食品厂废水进行处理,并对臭氧处理时间,臭氧浓度,处理水的流量等因素进行不同水平单因素实验,以找出最佳实验条件,同时结合实际问题,采用L9(34)正交表进行3因素3水平实验,最终得出臭氧—活性炭联用技术处理食品厂污水的最佳工艺条件为:臭氧处理时间为30min,臭氧质量浓度为9.6mg/L,水流量为0.8m3/h。在最佳工艺条件下,臭氧—活性炭结合工艺对COD的去除率为89.8%,对UV254的去除率为97.3%,达到了农田灌溉水质(水作和旱作的灌溉)标准,基本达到蔬菜灌溉用水的标准。  相似文献   

5.
谢磊 《中国农学通报》2010,26(17):367-369
通过城市污水处理厂的活性污泥培养出好氧颗粒污泥并处理高浓度猪场废水,对pH值、溶解氧浓度、进水浓度等主要操作条件进行了单因素试验。实验结果表明,颗粒污泥具有良好的生物活性。在进水氨氮浓度较高(>800mg/L)、pH为8左右、溶解氧浓度在2.0mg/L的条件下,稳定运行数天后,氨氮和COD的去除率均可达到80%以上。  相似文献   

6.
混凝-活性炭吸附工艺去除水中甲氰菊酯农药   总被引:1,自引:0,他引:1  
通过对含甲氰菊酯农药的模拟水样进行混凝活性炭吸附处理,分别考察了混凝剂种类、投加量、pH等因素对混凝效果的影响以及木质粉末活性炭投加量、吸附时间、pH等因素对吸附效果的影响。结果表明,对水样作常规混凝处理时,氯化铁的处理效果优于其他混凝剂,当氯化铁的投加量为20 mg/L,pH为8时,甲氰菊酯去除率可达59.4 %。对水样做活性炭吸附处理时,适宜pH范围为6~9,木质粉末活性炭最佳投加量为40 mg/L,最佳吸附时间为70 min,在最优吸附条件下,甲氰菊酯去除率可达81.6 %。在最优混凝吸附条件下,氯化铁混凝协同木质粉末活性炭吸附去除甲氰菊酯的去除率均大于90%,对水中甲氰菊酯去除效果较好。  相似文献   

7.
采用活性炭涂层改性悬浮填料,在连续曝气的条件下,考察了SBBR反应器脱氮性能。结果表明,SBBR反应器表现出良好的同步硝化反硝化(SND)脱氮性能,对NH3-N和TN的去除率分别为80.7%和63.1%。典型周期内反应器同步硝化反硝化率可达82.7%。单因素试验发现,脱氮率随着曝气时间t的增加而增加,随着溶解氧质量浓度ρDO和填料投加量δ增大而先增大后减小。同时,以溶解氧质量浓度、填料投加量和曝气时间为考察因素,脱氮率为评价指标,采用响应曲面法建立了二次多元回归模型。通过模型求解得出最佳工况:溶解氧浓度为2.37 mg/L,填料投加量为40.10%,曝气时间为5.17 h,此时,脱氮率得到最大值为69.28%。验证试验表明,回归模型的预测值与实测值偏差率为1.57%。  相似文献   

8.
为了研究PRB技术修复垃圾渗滤液污染地下水的可能性,筛选最佳反应介质及其配比,为城市垃圾渗滤液污染地下水的治理提供参考,选择零价铁粉、膨润土、沸石、活性碳、炉渣5种反应介质,研究其对垃圾渗滤液污染地下水的治理效果。结果表明:5种反应介质单独作用下,活性炭对地下水中的COD去除效果最好,去除率达到76.0%,沸石对COD去除效果最差,去除率仅为45.0%,但沸石对地下水中NH3的去除效果最好,去除率为70.8%,零价铁对NH3的去除效果最差,去除率为42.3%;选择零价铁、活性炭、沸石3种介质按照不同配比继续试验,得出对COD的去除效果以零价铁:活性炭:沸石= 2:2:1的比例最好,其次是1:2:2和2:1:2,对NH3的去除效果以零价铁:活性炭:沸石=1:2:2的比例最好,其次是2:1:2和2:2:1。  相似文献   

9.
葡萄柚汁树脂脱苦工艺的研究   总被引:1,自引:1,他引:0  
以福建引进的葡萄柚新品种为原料,进行葡萄柚汁树脂脱苦研究。通过树脂添加量、脱苦时间、脱苦温度、pH等因素研究葡萄柚汁脱苦最佳工艺。在单因素实验的基础上,通过正交实验确定葡萄柚汁树脂脱苦的最佳条件为:保持葡萄柚原汁pH,树脂脱苦最适温度为10℃,树脂添加量为2.0%,树脂脱苦最适时间为60 min。在此工艺条件下,葡萄柚果汁脱苦率达48.05%,能实现良好的风味特征。  相似文献   

10.
为了探讨混凝法去除水中纳米颗粒的可行性及最佳条件,研究了无机混凝剂(PAC、PFS、PAFC)和有机絮凝剂(CPAM、APAM、NPAM)对TiO2纳米颗粒的去除效果,并考察了投加量、pH、沉淀时间、水力条件及有机无机复配对TiO2纳米颗粒去除效率的影响。单独投加PAC、PFS和PAFC时,三者对应的最高去除率分别为92.51%、84.43%、95.66%。单独投加CPAM、APAM、NPAM时三者对应的去除率仅为61.72%、29.06%、55.37%。复配最佳混凝条件为:投加40 mg/LPAC和3 mg/LCPAM,pH值为9,G值143.5/s,沉淀时间15 min,此时,TiO2纳米颗粒去除率为99.6%。  相似文献   

11.
It is difficult to treat landfill leachate in China.Traditional biologic method and physical method always have high expenses,or cann''t reach the discharge standards.The authors use a new biologic method to treat landfill leachate,which is the Wood_microbial System from Japan.The system to be digested by 3 aeration tanks and 1 reaction tank.The comparison combine processed wool_dust broken pieces with the certain grain degree size were throw in the tanks.Dirty and organic matter are in the digest tanks through the aeration reaction and aneration reaction repeatedly.In this experiment the speed of wastewater discharge and oxygen supply has been changed, and the change of biologic system and the effect of pollutant are removed. The optimal treatment condition can be found.The experiment shows that the system has a good result,special for nitrogenous.The BOD is average to do away with the rate to amount to 90%,almost reach the second class or third class for leachate standard.But BOD loading should be not beyond 4 kg/(m 3.d),othrwise,the system will not operate in normally.  相似文献   

12.
Cavitating water jets were used to degrade complicated organic compounds sampled from landfill leachate from a sanitary landfill in Chongqing, P. R. China. The law of chemical oxygen demand (COD) and the impact of factors such as pumping pressure, confining pressure, cavitating time and pH were evaluated in the experiment. We concluded that a cavitating water jet can degrade complicated organic compounds. Cavitating water jets therefore can improve biological oxygen demand (BOD)5/COD. The optimal cavitating condition was also obtained: at a pH 9.0, confining pressure 0.6MPa, cavitating time 90mins and pumping pressure 10MPa,the COD, BOD5 and BOD5/COD increase to 124.8%, 293.3% and 52.44% respectively. Chromaticity decreases while SS increase to 191.5%. These changes create good conditions for subsequent treatment.  相似文献   

13.
水蕹菜对富营养化养殖水的净化作用研究   总被引:1,自引:0,他引:1  
为检测水蕹菜对富营养化水的净化能力,将水蕹菜漂浮栽培于富营养化水中,分析不同时间水质的变化。结果表明,漂浮栽培水蕹菜的水中,富营养化成分起初快速下降,20d后下降变缓,到40d时,化学需氧量降低了63.43%,总氮、硝态氮、铵态氮分别下降了67.63%、69.78%和75.75%,总磷、磷酸盐分别下降了62.24%和75.31%。水蕹菜生长速度在20d后开始下降。水蕹菜能有效净化富营养化养殖水。  相似文献   

14.
The removal efficiencies of different pollutants in subsurface flow constructed wetland (SSFW), surface flow constructed wetland (SFW) and combination flow constructed wetland(CFW) treating sewage plant effluent were comparatively analysed. The results were analyzed by using a reaction kinetics model. It is shown that COD, TN, TP are more effectively removed in SSFW than in other two types of wetland, and the kinetic constants are 0.29, 0.20, 0.28 m/d respectively. The SFW has higher removal rate on ammonia and the kinetic constant is 0.12 m/d. Temperature change greatly affects the kinetic constants of ammonia and total nitrogen removal reaction, whilst the influence on COD and TP are not significant. The pollutants removal efficiencies decrease greatly with the increase of hydraulic loading and areal loading. The increment of areal removal mass is reduced with the increase of areal loading in three types of wetland. It is strongly recommended that the constructed wetland be operated on low pollutants loading condition.  相似文献   

15.
With trait of late landfill leachate treated hardly, it is an effective method of enhancing biodegradability of late landfill leachate that electrolytic oxidation pretreats late landfill leachate, and it is very necessary to calculate current efficiency. Varity of organic pollutants in the late landfill leachate is studied under the electrochemical action by some tests and current efficiency under different electrolytic condition is calculated. The results show that the most high current efficiency is 34.11% when the current density is 15 mA/cm^2 and electrolytic time is 6.5 h.  相似文献   

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