BOD5稀释倍数的探讨

对稀释法测定生化需氧量（ＢＯＤ５）稀释倍数探讨如下。１已知ＣＯＤ值对于初次测定成分复杂的工业废水,若已知ＣＯＤ（Ｃ）值,其α（ＢＯＤ５／ＣＯＤ）一般在０２～０８之间,则ＢＯＤ５＝（０２～０８）ＣＯＤ根据《水和废水监测分析方法（第３版）》,ＢＯ...     

废水的BOD_5测定中根据BOD_5／COD_（cr）值确定稀释比的一种方法

废水的ＢＯＤ５测定中取稀释比是一个很重要的问题。本文根据数学推导得出ＢＯＤ５测定中取稀释比的一种方法。ＢＯＤ５／ＣＯＤｃｒ值在０．０５－０．１，０．１－０．３，０．３－０．６，０．６－１．０四个范围内其稀释比ｆ２可对应取５５／ＣＯＤｃｒ、２２／ＣＯＤｃｒ、９／ＣＯＤｃｒ、５／ＣＯＤｃｒ。     

用TOC值估算炼油废水BOD5的稀释倍数

根据ＴＯＣ与ＢＯＤ５之间的相关关系，来估算ＢＯＤ５稀释倍数，应用于炼油废水ＢＯＤ５的测定计算模型简单，操作快捷，准确。     

废水化学需氧量测定中稀释倍数的确定

废水化学需氧量测定中稀释倍数的确定漆利之（江苏淮阴县环境监测站，淮阴２２３３００）根据实测经验、资料或物料衡算了解ＣＯＤ大致浓度范围，当①ＣＯＤｃｒ值小于８００ｍｇ／Ｌ的水样可直接测定不必稀释。②ＣＯＤｃｒ估算值ｍ＞８００ｍｇ／Ｌ时，计算其最小稀释倍...     

五日生化需氧量测定中稀释倍数的估算

假定样品经过培养后耗氧率达５５％；推导出ＢＯＤ５稀释倍数Ｋ＝ＢＯＤ５／４．４，由稀释程度规定推导出ＢＯＤ５稀释倍数Ｋ＝（ＢＯＤ５－１）／４．０两种方法Ｋ基本相同，标准样品，工业废水经上述方法稀释后，测定结果比较满意，尤其对工业废水测定，既缩短了分析时间，又降低了测定误差。     

近年来国内稀释法测定BOD5研究进展

论述了近年来国内在稀释测定生化需氧量（ＢＯＤ５）中有关稀释倍数的研究成果；分析评价了一些确定稀释倍数的数理公式；总结了稀释法测定ＢＯＤ５的基本要求。     

BOD5样品分析中稀释倍数的确定

首衔正确估计出样品ＢＯＤ５浓度范围，并测定稀释水的溶解氧，然后根据稀释倍数公式计算三个适当的稀释倍数，本方法省时，可靠，适用性强，能够确保ＢＯＤ５样品分析一次成功。在ＢＯＤ５样品中分析中具有广泛的应用价值。     

关于用TOC值确定BOD_5稀释倍数的实验研究

关于用ＴＯＣ值确定ＢＯＤ＿５稀释倍数的实验研究刘秋欣，邢曼莉，李心红（辽宁鞍山市环境监测站，１１４００４）众所周知，水质环境监测中ＢＯＤ５测定的关键不外乎培养温度。接种液、稀释倍数的确定三大因素。在培养温度、接种液一定的条件下，稀释倍数的选取可谓至关...     

生化需氧量测定的稀释倍数研究进展

概述了稀释法测定生化需氧量（ＢＯＤ５）的基本要求，综述了近年来国内生化需氧量测定中有关稀释倍数研究的主要成果，分析评价了稀释法测定生化需氧量的一些数理公式。     

缫丝废水化学耗氧量与生化需氧量相关性探讨

根据缫丝行业废水ＣＯＤＣｒ与ＢＯＤ５的测定结果，通过研究它们之间的相关性，建立了相关方程式，从而以ＣＯＤｃｒ值预测预报ＢＯＤ５值，大大简化了分析测试工作，对控制该行业污染及其治理，加强监督管理起到积极作用。     

地表水中BOD 5监测时的快速估算

阐述了BOD5与溶解氧之间的相关性,提出可以通过溶解氧和水温估算BOD5值,但是,首先要建立水样稀释前溶解氧与BOD5的相关关系.举例说明了对地表水中BOD5值的估算和稀释倍数确定的应用.     

Application of Defined Co-Immobilized Microbial Consortium as a Ready-to-Use Seed Inoculum in Bod Analysis

A number of microorganisms were isolated from sewage. Biochemical Oxygen Demand (BOD-5 day) analysis was carried out by individual pure cultures. The cultures giving higher or equal BOD values as compared to reference GGA solution were selected for the formulation of a defined mixed microbial consortium. This microbial consortium was co-immobilized on calcium-alginate beads. Four synthetic and six industrial samples were tested for BOD by using immobilized beads as well as sewage as source of seeding materials. BOD values obtained with beads for all the synthetic as well as industrial samples were fairly comparable with those obtained with sewage. Reusability of prepared microbial beads was also checked with different synthetic and industrial samples and was compared with reference GGA solution. The same microbial beads can be reused three times for different BOD-5 day estimations. It is recommended that immobilized microbial beads can be used as a ready-to-use seeding material for BOD analysis.     

Comparison of BOD results obtained by dilution and manometric methods in sanitary landfill leachates

This study examined the determination of BOD in landfill leachates by dilution (D-method) and manometric methods (M-method). The differences in results were discussed based on statistical tests. The effects of sample dilution, seeding, chloride and total Kjeldahl nitrogen (TKN) level were examined. The M-method was found to be more sensitive to increases in chloride and TKN concentrations. However, in the M-method the positive interference of nitrogenous BOD (NBOD) to carbonaceous BOD (CBOD) was more successfully prevented. The BOD rate constant k and the ultimate BOD (BODu) were estimated by non-linear regression. With the M-method these parameters could be more reliably estimated than the D-method. Suggestions were made for BOD analyses in landfill leachates in future studies.     

BOD生物传感器快速测定方法应用与探讨

介绍了微生物传感器快速测定生化需氧量(BOD)的方法,通过对标准溶液、工业废水、地表水、污水处理厂废水的检测,分析其精密度和准确度,通过与BOD_5的比对,对方法的存在问题及适用性进行了探讨和研究,为该方法的发展及其在环境监测中的实际应用提供了技术依据。     

Practical field application of a novel BOD monitoring system

A biochemical oxygen demand (BOD) monitoring system, based on electrochemically-active bacteria in combination with a microbial fuel cell, has been developed for the purpose of on-site, on-line and real-time monitoring of practical wastewater. A microbial fuel cell that had been enriched with electrochemically-active bacteria was used as the basis of the measurement system. When synthetic wastewater was fed to the system, the current generation pattern and its Coulombic yield were found to be dependent on the BOD5 of the synthetic wastewater. A linear correlation between the Coulombic yields and the BOD5 of the synthetic wastewater were established. Real wastewater obtained from a sewage treatment plant also produced a highly linear correlation between the Coulombic yield and BOD5 in the system. To examine on-site, on-line and real-time monitoring capability, the BOD monitoring system was installed at a sewage treatment plant. Over 60 days, the measurement system was successfully operated with high accuracy and good stability with the measuring period for a sample being 45 min. This application showed that the application of the measurement system was a rapid and practical way for the determination of BOD5 in water industries.     

Design and assembly of an experimental laboratory for the study of atmosphere–plant interactions in the system of fumigation chambers

A 5-day biochemical oxygen demand (BOD(5)) test has been used as the standard measurement of organic pollution in rivers worldwide. However, it may be argued that BOD is not a sufficient indicator of organic pollution when nitrogenous biochemical oxygen demand (NBOD) is present in water samples. In this study, BOD, NBOD, and carbonaceous biochemical oxygen demand (CBOD) of treated sewage effluent (TSE) were measured near at the discharge outlet of 3 sewage treatment plants (STPs) in Sakai, Itachi, and Kashio rivers in Central Japan. Additional measurements were conducted at one point upstream and two points downstream from the STP discharge points in the rivers. It was estimated that NBOD values in the TSE of Sakai River, Kashio River and Itachi River accounted for 54%, 69% and 18% of their BOD values, respectively. Respective NH4+ and NO2- concentrations were positively correlated with those of NBOD values in Sakai, Itachi, and Kashio rivers. The BOD loads from the TSE were estimated to be 2.2, 5.7, and 1.2 times higher than the CBOD loads in the Sakai, Itachi, and Kashio rivers, respectively. The variation of the portion of NBOD values of each TSE, as well as the ratios of CBOD to BOD loads, was attributed to the difference in each STP system. Consequently, the NH4+ and NO2- of TSE led to the increase of NBOD in the Sakai River basin.     

浅谈BOD_5的质量控制

接种稀释水是做好ＢＯＤ５质量控制的关键，根据不同的季节、不同的温度、不同深度的花园土，以得到较理想的接种稀释水。