这关键区别between BOD and COD is thatthe BOD is the oxygen demand of microorganisms to oxidize organic matter in the water under aerobic conditions while the COD is the oxygen demand to oxidize all the pollutants in the water chemically。
Quality of a given water sample depends on some variable factors. Also, it can be categorized in several ways such as biological, physical and chemical. They are namelypH,浊度,微生物,溶解的氧含量和溶解的非营养素。可能影响水质的主要参数是水的组成。通常水含有无机离子的气体有机化合物,活生物体和其他一些痕量化合物。该组合物取决于不同因素,例如温度,来源和污染水平等。氧需求是测量水质的最常见方法之一。生物氧需求(BOD)和化学氧需求(COD)都属于该现象。本文的主要目的是对它们的概念,相似性,差异和实际用法提出清晰的想法。
CONTENTS
1。概述和关键差异
2。什么是身体
3。What is COD
4。Similarities Between BOD and COD
5.并排比较 - 表格形式为BOD VS COD
6.Summary
什么是Bod?
BOD is the abbreviation of biological oxygen demand in water. It is also called as biochemical oxygen demand. There is a significant relationship among organic matter, microbial population and dissolved oxygen content in water.有氧微生物需要氧气来代谢。因此,他们使用溶解氧并将有机物转化为能量。此外,他们利用有机食品中提供的能量,进一步的代谢反应,尤其是为了生殖。因此,人口密度在获得的能源方面正在增加,但取决于可用的食物含量。对新创建的人群的代谢需求再次产生了对溶解的氧气的需求,该氧与可用食品成正比。
因此,生物氧的需求是有氧生物所需的溶解氧气的量,以分解有机材料,以获取代谢的能量。该值应在给定的时期内在给定的温度下进行测试,这也将取决于营养浓度和酶促反应。此外,污染水中的BOD价值通常高于淡水。由于家用污水,石油残留物以及动物和农作物的废物,因此可能是高生BOD的结果。
什么是鳕鱼?
化学氧需求(COD)是确定水中总有机化合物的间接方法。因此,COD是指将所有有机碳氧化为CO所需的氧气量2and H2O. COD不仅参与有机物的分解,而且还与无机化学物质(氨和亚硝酸盐)的氧化有关。这被解释为水的能力,在两种情况下消耗溶解氧。
此外,COD测试使用化学试剂将污染物氧化。因此,它不依赖于使用微生物来通过有氧呼吸分解样品中的有机材料。不仅如此,与BOD相比,COD总是很高,因为COD是对污染物的完全分解的测量,与BOD不同,BOD通常不会将生化分解作为化学崩溃。
What are the Similarities Between BOD and COD?
- COD and BOD can be indicated as mg/L or ppm (parts per million).
- Both parameters measure the amount of oxygen needed to oxidize pollutants in water.
- Also, both measurements indicate the intensity of water pollution.
- 此外,BOD和COD都是虚度的关键ewater for determining the amount of waste in the water.
What is the Difference Between BOD and COD?
BOD refers to the amount of oxygen consumed by microorganisms to decompose organic matter in water under aerobic conditions. On the other hand, COD refers to the amount of oxygen needed to oxidize all the organic and inorganic pollutants in water chemically. Therefore, this is the key difference between BOD and COD.
此外,COD测试利用强氧化试剂在水中氧化材料,而BOD测试不使用化学试剂,而是允许微生物对有机物作用。因此,这也是BOD和COD之间的区别。BOD和COD之间的另一个区别是,可以在实验室的几个小时内完成COD测试。但是,BOD测试需要五天。此外,由于COD测量氧化总污染物所需的氧气量,因此COD值总是大于BOD值。同样,在COD中,在BOD中没有发生污染物的完全分解。
这below infographic on the difference between BOD and COD describes these differences comparatively.
摘要 - Bod vs Cod
BOD and COD are two parameters to measure water quality and the amount of organic pollution of water. BOD measures the amount of oxygen utilizing by aerobic microorganisms to breakdown organic matter in water. On the other hand, COD measures the amount of oxygen needing to oxidize total organic and inorganic pollutants in water chemically without the involvement of microbes. So, this is the key difference between BOD and COD. Moreover, COD is always higher than the BOD. Since COD uses a strong oxidizing agent, it oxidizes pollutants completely into CO2and H2o与BOD不同。BOD是一项耗时的测试,而COD可以在几个小时内完成。因此,这总结了BOD和COD之间的差异。
参考:
1。“Chemical Oxygen Demand.” NeuroImage, Academic Press.在这里可用
2。“Biochemical Oxygen Demand.” Wikipedia, Wikimedia Foundation, 11 Dec. 2018.在这里可用
图片提供:
1.“ BOD测试瓶(生物氧需求)(3231600029)” Susana秘书处(CC BY 2.0)通过下议院维基梅迪亚
2。”2719059″ (CC0) viaMax Pixel
Leave a Reply