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《水文科学杂志》2013,58(2):362-366
Abstract Most commonly used biochemical oxygen demand (BOD) and dissolved oxygen (DO) models have been tested for their applicability in the River Kali, which is one of the most polluted rivers in India. A total of 732 field data sets were generated during field survey from March 1999 to February 2000. The modelling of BOD and DO in the River Kali involves derivation and solution of the governing equations that describe concentration change with time and space brought on by advective, decay, settling and loading functions. However, due to continuous discharges (e.g. from wastewater treatment plants) and steady-state flow conditions in the River Kali, the dispersion effects are found to be insignificant. In the analysis, the model parameters used in BOD-DO models were optimized using the Newton-Raphson technique and the performance of different models was evaluated using correlation statistics (r 2) and error estimation, viz. standard error (SE) and mean multiplicative error (MME). The results indicate that the BOD-DO models developed after Camp (1963) yielded the best agreement with the observed values as compared with several other approaches. 相似文献
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Interferences by Volatile Substances in Measuring the Biological Oxygen Consumption Using the Sapromat Aerobic microbial degradation processes can be well monitored by means of the oxygen consumption. There are special analyzers for these measurements, such as the Sapromat produced by Voith GmbH Heidenheim, Germany. Interference occurs during investigations with (or in the presence of) volatile components of low water solubility, which appear in dissolved state or as an additional phase. Thus, the Sapromat records an apparent oxygen consumption without the participation of microorganisms which is in the order of usual BOD5-values or even above them and is attributable to physico-chemical reasons and the measuring system used. The present paper points out this phenomenon and investigates the reasons. These are demonstrated and discussed. The results emphasize the urgency of blanks in order to detect abiotic effects using the Sapromat. 相似文献
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耗氧微生物的种类对光化学BOD传感膜性能影响的研究 总被引：2，自引：0，他引：2
采用同一制膜方法分别对异常汉逊酵母、枯草芽孢杆菌和恶臭假单胞菌进行等量包埋制备固定化微生物膜,并采用自制的光化学BOD微生物传感器试验了各种膜的响应时间、线性范围、重现性等方面的性能,从而选择性能最佳的耗氧微生物。同时也考察了温度、pH、盐度对不同微生物膜的影响。实验结果表明:以恶臭假单胞菌膜制备的传感膜性能最佳,测定BOD时间低于20 min,方法的重现性及精密度较好,其荧光强度变化速率最大值(dI/dt)的相对标准偏差为2.2%,在BOD值0~80 mg·L-1范围内呈现良好的线性关系,相比之下更适用于BOD的快速检测。 相似文献