共查询到18条相似文献,搜索用时 125 毫秒
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用分光光度法测定水中化学需氧量CODCr,通过正交试验选择氧化的最佳选择。试验结果表明对CODCr值为50~1000mg/L的水样:氧化剂K2Cr2O7用量为0.20~0.40mol/L,催化剂Ag2SO4用量为10g/LH2SO4,消解时间10min,加热温度180℃。用CODCr为138mg/L的质控标样进行验证试验,其绝对误差为0.5~3.0mg/L。与标准方法相比用分光光度法测定CODCr具有分析误差小,省时、省力,节约药剂的特点。 相似文献
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间歇曝气系统中硝酸盐氮负荷对脱氮效率的影响 总被引:1,自引:0,他引:1
本试验主要考察间歇反应器缺氧阶段硝酸盐氮负荷NNO-x-N(KgNO-x-N/KgMLSSd)对脱氮效率的影响。试验结果表明:在一定水温和BOD5/NOx-N下,NNOx-N负荷对脱氮效率有显著影响。在反应器中采用高浓度污泥是降低NNOx-N的有效途径,有利于反应器脱氮速率VDN(mg/l·min)的提高。此外,通过正交试验得出了在BOD5/NO-x一定时,NNO-x-N、T℃与脱氮效率ηNO-x-N之间的数量关系式 相似文献
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A/O~2法在炼油污水处理中的应用 总被引:3,自引:0,他引:3
为探索A/O2(厌氧Anaerobic/好氧Oxic/好氧Oxic)法在处理炼油污水中的应用,进行了A/O2法中型试验,验证NH3-N容积负荷与去除率之间的关系,以及溶解氧、含油量对处理效果的影响等几项内容。A/O2法应用于炼油污水的处理是可行的,对COD、NH3-N、油、酚、SS等有很好的处理效果。将A/O2法应用于济南炼油厂,各构筑物运转正常,处理效果很好,完全达到国家排放标准。A/O2用来处理炼油污水,工艺可行、技术先进、经济合理,不仅对COD、氨氮去除率高,对其它排放指标去除率都很高。实践证明A/O2法用来处理炼油污水是完全可行的,济南炼厂污水处理的成功经验值得推广。 相似文献
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根据粉煤灰的吸附机制,通过试验研究,为粉煤灰吸附工程提供了设计参数,同时也为探明COD、BOD5及色度在粉煤灰中的降解转化规律提供了借鉴依据。 相似文献
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本试验采用UASB—接触氧化工艺对沤麻废水的处理进行了研究,系统启动两个月后达到稳定的处理效果,厌氧段进水COD浓度为700mg/1,有机负荷为9.25kgCOD/m3·d,停留时间为24小时,COD去除率可达到89.3%,好氧段接触氧化池的有机负荷为2.IkgCOD/m3·d,处理时间为10小时,整个系统总的COD去除率可达到97%,该工艺是处理高浓度沤麻废水行之有效的方法。 相似文献
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常用钻井液填加剂对钻井污水化学需氧量的影响 总被引:1,自引:1,他引:0
针对石油工业钻井污水化学需氧量(COD)严重超标的状况,从分析测定目前油田常用的8种钻井液添加剂的COD入手,探讨了钻井液添加剂对钻井污水的影响。实验结果表明:8种钻井液添加剂按油田现场配比复配后,对钻井污水COD的影响程度各不相同,其大小依次为:柴油、HPAN、磺化沥青、PAN、PAM-1、FA-367、XY-27、CMC;钻井污水中COD值严重超标的主要因素是钻井液添加剂;并且钻井液添加剂浓度与其对应的COD之间存在良好的一元线性关系。根据一元线性回归方程可较好地预测油田现场各钻井液添加剂对COD的影响,为解决钻井污水处理这一难题提供科学依据。 相似文献
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In this study, a model to estimate the optimum mine size is developed. The model is developed on the basis of marginal analysis. The model solves for the production rate at which the present value of marginal costs equals the present value of marginal revenues—the rate that microeconomic theory shows will maximize the net present value of production from the mine.In addition, the article discusses the effects on the optimum production rate of: the physical characteristics of the deposit, economic factors, and financial factors. It has been found that, not surprisingly, as the reserve tonnage increases, the optimum mine size increases. Also, the optimum production rate increases as the ore grade increases. A direct relationship has been found between the mineral price and the optimum production rate. The optimum mine size is found to be inversely related to the expected growth rate of mineral price, while it is directly related to the expected growth rate of mining costs. A concave relationship has been found between the cost of capital and the optimum mine size. 相似文献
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油田钻井废泥浆固化处理研究 总被引:2,自引:1,他引:1
文章结合油田的现场实际情况,针对该区钻井废泥浆污染物的特性,研究了固化的最佳工艺条件,并对固化效果进行评价。通过多组固化处理定性对比实验,从多种处理剂中筛选出处理效果较好的水泥、粉煤灰、石灰和黄土作为固化处理废泥浆的固化剂原材料。利用筛选出的固化剂组成,设计正交实验,确定固化剂最佳配方为每100mL泥浆添加10g水泥、20g粉煤灰、8g石灰、15g黄土。影响因素对固化处理效果的影响实验结果表明:当废泥浆固相含量在30%~70%,固化温度在20~40℃之间,固化时间能够满足7d的条件下,固化效果最佳。 相似文献
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Hartmut Laabs Gert A. Schultz 《Journal of the American Water Resources Association》1992,28(1):211-222
ABSTRACT: The determination of optimum reservoir operating rules for reservoirs with multiple conflicting objectives is still a difficult task - despite many publications in this field. In this paper a three-step Multi Objective Decision Making (MODM) method is presented, the emphasis of which is placed on the necessity to make the work easy for the decision maker, which many MODM techniques fail to achieve. The method is applied to the development of a compromise optimum operating rule for a multi-purpose reservoir. In the first step of the method stochastic DP is chosen which is combined with the “weighting method” allowing combination of various objectives into one objective function. By systematically varying the weights for the objectives a large number of pareto optimum reservoir operating rules is generated. In the second step of the method the performance of all these operating rules is tested with the aid of a model simulating reservoir operation. The results are statistically analyzed and the reliabilities for attaining the various objectives are computed. The third step of the model applies another MODM technique which allows the decision maker - in a computer dialog - to select his optimum reservoir operating rule from the large number of pareto optimum solutions generated in step 1. Here he can specify his preferences for the various objectives. For this purpose two alternative MODM techniques are offered: Compromise Programming and the SEMOPS method. Their performance is shown along with the generation and selection of operating rules for the multi-objective Wupper reservoir system in Germany. 相似文献
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为了研究车载巡回处理装置对小城镇垃圾渗滤液的处理效果,采用自制的UV-Fenton试验装置研究了pH值、FeSO_4剂量、反应时间等因素对处理效果的影响,结果表明:最佳pH值为4.0,进水中COD为825 mg/L时,FeSO_4和H_2O_2的投加量分别为0.008 mol/L和0.08 mol/L,此时COD去除率72.22%,出水COD为216 mg/L;随着FeSO_4投加量缓慢增加到一定程度后转而下降,FeSO_4最佳投加量为0.008 mol/L;不同H_2O_2和Fe~(2+)配比对COD去除效果具有影响,(10:1)时为最佳配比。经过氨吹脱和混凝沉淀预处理的渗滤液采用UV/Fenton处理工艺,出水中COD可以达到《生活垃圾填埋场污染控制标准》(GB 16889-1997)中二级标准。 相似文献
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JZW-4钻井污水处理装置的研制及应用 总被引:1,自引:0,他引:1
为解决现有的钻井污水处理设备无法满足污水处理需要的问题,研制了JZW-4型钻井污水处理装置。对污水进行了室内试验,证明只有混凝-离心-过滤法是最佳的处理方法;并根据此方法研究制造出了JZW-4钻井污水设备。现场试验结果表明:用该装置处理污水,出口水质符合国家综合二级排放标准。说明JZW-4钻井污水处理装置工艺流程设计合理,适应性强,处理效果好,具有创造性。 相似文献