在面对顺酐废水

In the face of maleic anhydride wastewater

顺酐废水主要特点是COD含量非常高、其内的大分子污染物特别多、pH值低、营养物质缺乏等，因此在使用传统的废水处理工艺是很难做到达标排放。

The main characteristics of maleic anhydride wastewater are high COD content, abundant macromolecular pollutants, low pH value, and lack of nutrients. Therefore, it is difficult to achieve standard discharge using traditional wastewater treatment processes.

例如某企业的顺酐装置排放的废水是有三股，三股都不是“善茬”，其中离心机轻相废水的水量和浓度都较高，COD浓度在26000mg/L-32000mg/L，其它废水则是真空泵排放废水，COD浓度都可以超过10000mg/L；

For example, the wastewater discharged from a certain enterprise's maleic anhydride plant consists of three streams, none of which are "good crops". Among them, the amount and concentration of the centrifuge light phase wastewater are relatively high, with a COD concentration of 26000mg/L-32000mg/L, while the other wastewater is discharged from a vacuum pump, with a COD concentration exceeding 10000mg/L;

而另一个企业的顺酐装置废水是会排放出溶剂萃取离心分离废水和切换冷却器清洗废水，COD浓度会超过40000mg/L，其内的更是富含邻苯二甲酸、富马酸、马来酸、焦油等污染物，处理难度巨大。

The wastewater from another enterprise's maleic anhydride plant will discharge solvent extraction centrifugal separation wastewater and switching cooler cleaning wastewater, with a COD concentration exceeding 40000 mg/L. The wastewater is also rich in pollutants such as phthalic acid, fumaric acid, maleic acid, tar, etc., making treatment difficult.

生物法是解决有机物的常见工艺：厌氧生物处理技术+好氧生物处理技术。

Biological method is a common process for solving organic matter: anaerobic biological treatment technology+aerobic biological treatment technology.

厌氧生物处理技术是可以做到提高可生化性，去除废水当中的大分子污染物，并且COD去除率相对较高，可从COD浓度在7000mg/L降低1200mg/L（UASB反应器等）。它的处理是利用兼性厌氧菌和专性厌氧菌的共同作用，将废水中的有机物分解并产生CO2，CH4等的一种生物处理技术，其具体过程是通过水解、发酵(或酸化)、产乙酸和产甲烷四个阶段来达到去除有机物的目的。

Anaerobic biological treatment technology can improve biodegradability, remove macromolecular pollutants from wastewater, and have a relatively high COD removal rate, which can be reduced from a COD concentration of 7000mg/L to 1200mg/L (UASB reactor, etc.). Its treatment is a biological treatment technology that utilizes the combined action of facultative anaerobic bacteria and specialized anaerobic bacteria to decompose organic matter in wastewater and produce CO2, CH4, etc. The specific process is achieved through four stages: hydrolysis, fermentation (or acidification), acetic acid production, and methane production to remove organic matter.

与好氧生物处理技术相比，虽说厌氧生物处理具有不需充氧、能耗低、污泥量小等特点，但是厌氧反应器的启动时间较长、出水水质未能达到排放标准，需要配合好氧生物处理技术来完成废水的净化。

Compared with aerobic biological treatment technology, although anaerobic biological treatment has the characteristics of no need for oxygenation, low energy consumption, and small sludge volume, the start-up time of anaerobic reactors is longer, and the effluent quality does not meet the discharge standards. Therefore, it is necessary to cooperate with aerobic biological treatment technology to complete the purification of wastewater.

现在也有很多好氧生物处理技术可应用在浓度较高生物接触氧化法、生物降解反应器系统(RBS)、深井曝气法(DSP)和序批式活性污泥法(SBR)等。

There are also many aerobic biological treatment technologies that can be applied in high concentration biological contact oxidation, biodegradation reactor systems (RBS), deep well aeration (DSP), and sequencing batch activated sludge (SBR) processes.

生物接触氧化法是生物膜法的一种。在生物接触氧化法中，微生物主要以生物膜的状态附着在固体填料上，有部分生物絮体呈破碎生物膜状悬浮于处理水中，生物接触氧化法中有机物的去除主要靠生物膜(附着微生物)的作用来完成。

Biological contact oxidation method is a type of biofilm method. In the biological contact oxidation method, microorganisms mainly adhere to solid fillers in the form of biofilms, and some biological flocs are suspended in the treated water in the form of broken biofilms. The removal of organic matter in the biological contact oxidation method mainly relies on the action of biofilms (attached microorganisms).

如果处理顺酐废水采用生物法进行降解的话，还需要针对废水内的情况，例如油脂、可生化性、偏酸性等问题，在生化处理阶段前进行解决。

If biological degradation is used to treat maleic anhydride wastewater, it is necessary to address issues such as oil, biodegradability, and acidity in the wastewater before the biochemical treatment stage.