炼油废水化学需氧量贡献物质的研究

Research on the Contributing Substances of Chemical Oxygen Demand in Refining Wastewater

摘要

化学需氧量（Chemical Oxygen Demand, COD）是指在严格规定的条件下，利用强氧化剂处理水样时，水中还原性物质被氧化分解所消耗的氧化剂的量，通常以单位体积水样消耗的氧的质量表示（mg/L）。它是评价水体受有机物污染程度的重要综合性指标。针对催化烟脱硫装置外排废水COD持续超标的问题，通过系统查阅文献资料、深入分析氧化反应机理，并结合大量实验室测试与水质分析，最终识别出对COD贡献较大的主要物质组分，包括残留的还原性无机离子、部分难降解有机物等。这一研究结果为后续优化工艺参数、调整操作条件或引入深度处理措施提供了可靠依据，有助于实现废水COD的有效控制与达标排放。

Abstract

Chemical Oxygen Demand (COD) refers to the amount of oxidant consumed for the oxidation and decomposition of reductive substances in water when treating water samples with strong oxidants under strictly specified conditions. It is usually expressed as the mass of oxygen consumed per unit volume of water sample (mg/L). It is an important comprehensive indicator for evaluating the degree of organic pollution in water bodies. In response to the persistent problem of COD exceeding the standard in the wastewater discharged from the catalytic flue gas desulfurization device, through systematic literature review, in-depth analysis of the oxidation reaction mechanism, and combined with a large number of laboratory tests and water quality analysis, the main material components that contribute significantly to COD were finally identified, including residual reductive inorganic ions and some refractory organic substances. This research result provides a reliable basis for the subsequent optimization of process parameters, adjustment of operating conditions or introduction of advanced treatment measures, which is conducive to the effective control of COD in wastewater and its compliance with discharge standards.

关键词

催化烟脱 / 化学需氧量COD / 贡献物质

Key words

Catalytic flue gas removal / Chemical Oxygen Demand (COD) / contributing substances

参考文献

[1] 曹臣 等， 废水处理生物出水中COD构成的解析-以焦化废水为例【J】. 环境化学， 2012, 31（10）： 1494-1501

[2] 李宁, 催化裂化烟气脱硫脱硝装置废水COD超标原因分析及应对措施【J】. 石油炼制与化工， 2021, 52（01）： 126-130

[3] 李琦 等， 白洋淀典型水域COD的组成及各组分贡献.【J】 环境化学， 2023, 44(09): 4915-4926