Treatment and resource utilization for a non-biodegradable organophosphorus wastewater using micro-channel reactor

Pub Date : 2023-08-25 DOI:10.1590/s1413-415220220235

Hongxia Liu, Zhiguo Wang

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Abstract

ABSTRACT This study aimed to develop a method to treat and reuse non-biodegradable organophosphorus industrial wastewater using the micro-channel reactor. As an important pharmaceutical and fine chemical intermediate, diethyl hydroxymethylphosphonate (DHP) produces large amounts of industrial wastewater, which poses a serious threat to natural environment and human health. It is of great value to find a treatment method of the DHP industrial wastewater with simple operation, good safety, low cost, and environment friendly. In this study, hydrogen peroxide (H2O2) and DHP industrial wastewater were reacted in the micro-channel reactor. Reaction conditions were optimized by adjusting reaction temperature, reaction time, reaction pressure, and sampling flow rate. The treated wastewater was further neutralized by sodium hydroxide (NaOH). After the oxidation and neutralization reaction of the DHP industrial wastewater, the removal rate of chemical oxygen demand (COD) in treatment wastewater can reach 97.3%. Moreover, after the treated solution being dried, the inorganic phosphate solid was obtained with the phosphorus content as high as 92.1%. It can realize the reuse of phosphorus resources for the DHP industrial wastewater.

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微通道反应器处理不可生物降解有机磷废水及其资源化利用

摘要本研究旨在开发一种利用微通道反应器处理和回用不可生物降解的有机磷工业废水的方法。羟甲基膦酸二乙酯(DHP)作为一种重要的医药和精细化工中间体，产生了大量的工业废水，对自然环境和人类健康造成了严重威胁。寻找一种操作简单、安全、成本低、环境友好的DHP工业废水处理方法具有重要的价值。在微通道反应器中对过氧化氢(H2O2)和DHP工业废水进行了反应。通过调节反应温度、反应时间、反应压力和取样流量，优化反应条件。处理后的废水进一步用氢氧化钠(NaOH)中和。DHP工业废水经氧化中和反应后，处理废水中化学需氧量(COD)去除率可达97.3%。处理后的溶液经干燥处理后，得到磷含量高达92.1%的无机磷酸盐固体。可实现DHP工业废水磷资源的回用。

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