{"id":1707,"date":"2022-03-07T14:47:31","date_gmt":"2022-03-07T13:47:31","guid":{"rendered":"https:\/\/active-oxygens-sustainability.evonik.com\/artikel\/anspruchsvolles-industrieabwasser-nachhaltig-klaeren\/"},"modified":"2022-04-20T16:16:22","modified_gmt":"2022-04-20T14:16:22","slug":"sustainable-treatment-of-high-maintenance-wastewater","status":"publish","type":"article","link":"https:\/\/active-oxygens-sustainability.evonik.com\/en\/articles\/sustainable-treatment-of-high-maintenance-wastewater\/","title":{"rendered":"Sustain\u00adable treat\u00adment of high-main\u00adte\u00adnance wastewater"},"content":{"rendered":"\n
\n
<\/div>\n<\/div>\n\n\n\n
\n
<\/div>\n\n\n\n
\n

Sustain\u00adable treat\u00adment of \u201chigh-main\u00adte\u00adnance\u201d indus\u00adtrial wastewater<\/h1>\n

Indus\u00adtrial waste\u00adwater in the chem\u00adi\u00adcal indus\u00adtry is often polluted. Evonik will in future utilize the envi\u00adron\u00admen\u00adtally compat\u00adi\u00adble, resource-conserv\u00ading Fenton reac\u00adtion, involv\u00ading hydro\u00adgen perox\u00adide supplied by Evonik Active Oxygens, for pretreat\u00adment purposes at its Marl site.<\/span><\/span><\/h4>\n\n\n\n
\n
<\/div>\n<\/div>\n<\/div>\n\n\n\n
<\/div>\n\n\n\n
2<\\\/sub>O2<\\\/sub> in Fenton plant to pretreat contaminated industrial wastewater sustainably"}\"><\/div><\/div>\n<\/div>\n\n\n\n
\n
<\/div><\/div>\n<\/div>\n\n\n\n
\n
<\/div>\n\n\n\n
\n

G<\/span>reat things have happened at Marl Chem\u00adi\u00adcal Park, Evonik\u2019s largest site in Germany. A new plant complex for manu\u00adfac\u00adtur\u00ading high-perfor\u00admance plas\u00adtic, Polyamide 12, is \u201cthe largest capac\u00adity enlarge\u00adment in Evonik\u2019s recent history,\u201d says J\u00f6rg Gissel\u00admann, Head of Envi\u00adron\u00admen\u00adtal Oper\u00ada\u00adtions in Marl. And there\u00adfore, prob\u00ada\u00adbly the largest and most spec\u00adtac\u00adu\u00adlar \u201cnew addi\u00adtion\u201d to the massive chem\u00adi\u00adcal park in the Ruhr region ever. Sections of the plant have been in oper\u00ada\u00adtion since Janu\u00adary 2021, while further expan\u00adsion of manu\u00adfac\u00adtur\u00ading capac\u00adity in Marl is now good to go.<\/p>\n<\/div>\n\n\n\n

<\/div>\n\n\n\n
<\/div>\n<\/div>\n\n\n\n
\n
<\/div>\n\n\n\n
\n
Pretreat\u00adment of heav\u00adily polluted indus\u00adtrial wastewater<\/h5>\n

However, indus\u00adtrial produc\u00adtion also gener\u00adates indus\u00adtrial waste\u00adwater. Normally polluted process water can be puri\u00adfied in a waste\u00adwater treat\u00adment plant. In such plants, a screen first of all removes solids and suspended matter, and then pollu\u00adtants are decom\u00adposed by bacte\u00adria. This is usually the most effec\u00adtive method of treat\u00ading cont\u00ada\u00adm\u00adi\u00adnated process water.<\/p>\n

But some indus\u00adtrial waste\u00adwater \u2013 espe\u00adcially in the chem\u00adi\u00adcal and phar\u00adma\u00adceu\u00adti\u00adcal indus\u00adtries \u2013 is heav\u00adily cont\u00ada\u00adm\u00adi\u00adnated by organic and inor\u00adganic pollu\u00adtants, such as aromatic compounds, hydro\u00adcar\u00adbons, amines and others. \u201cThis waste\u00adwater can\u2019t be biode\u00adgraded in a waste\u00adwater treat\u00adment plant,\u201d says Philipp Christ, Oper\u00ada\u00adtions Assis\u00adtant at Evonik Active Oxygens. \u201cThe bacte\u00adria are unable to do that job. That is why this waste\u00adwater has to be pretreated, before it is piped into the treat\u00adment plant.\u201d If new waste\u00adwater flows are added to an indus\u00adtrial site, e.g. as a result of a new produc\u00adtion facil\u00adity, it is impor\u00adtant to scru\u00adti\u00adnize them.<\/p>\n<\/div>\n\n\n\n

<\/div>\n\n\n\n
<\/div>\n<\/div>\n\n\n
<\/div>\n\n\n
\n
<\/div>\n\n\n\n
\n

In the past, heav\u00adily polluted indus\u00adtrial waste\u00adwater was often incin\u00ader\u00adated \u2013 an expen\u00adsive and energy-inten\u00adsive process that nega\u00adtively impacted on the envi\u00adron\u00adment.  Alter\u00adna\u00adtive processes were there\u00adfore devel\u00adoped to break up the large, tough-to-degrade mole\u00adcules in the waste\u00adwater to enable them to then be degraded by bacte\u00adria. These are mainly the so-called AOP<\/a> (advanced oxida\u00adtion processes) meth\u00adods, which work on the basis of hydro\u00adgen perox\u00adide<\/a> (H2<\/sub>O2<\/sub>) or ozone. H2<\/sub>O2<\/sub> is a highly effec\u00adtive oxidant<\/a> that\u2019s produced and sold by Evonik Active Oxygens. Given that this chem\u00adi\u00adcal decom\u00adposes into water and oxygen during the reac\u00adtion, no harm\u00adful by-prod\u00aducts remain, as with other oxidants.<\/p>\n<\/div>\n\n\n\n

<\/div>\n\n\n\n
<\/div>\n<\/div>\n\n\n\n
\n
<\/div>\n\n\n\n
<\/div><\/div>\n\n\n\n
<\/div>\n\n\n\n
<\/div>\n<\/div>\n\n\n\n
<\/div>\n\n\n\n
\n
<\/div>\n\n\n\n
\n
Hydro\u00adgen perox\u00adide is a key compo\u00adnent of the Fenton reaction<\/h5>\n

These AOP meth\u00adods involve hydro\u00adgen perox\u00adide being catalyzed by addi\u00adtional compo\u00adnents like ultra\u00advi\u00ado\u00adlet light or \u2013 as in the Fenton reac\u00adtion<\/a> \u2013 iron salts, in order to increase the oxida\u00adtion effect. Combi\u00adna\u00adtions of compo\u00adnents are also an option. Under certain condi\u00adtions, the catalyza\u00adtion of H2<\/sub>O2<\/sub> results in the forma\u00adtion of so-called hydroxyl radi\u00adcals, which have a very high oxida\u00adtion poten\u00adtial. These break up the complex, tough-to-degrade mole\u00adcules, which then become small, water-solu\u00adble and biodegrad\u00adable. \u201cSo, what remains are small organic frag\u00adments, such as acetic acid or lactic acid, which are then metab\u00ado\u00adlized by the bacte\u00adria in the waste\u00adwater treat\u00adment plant,\u201d Christ explains.<\/p>\n

The vari\u00adous AOP meth\u00adods are suit\u00adable for differ\u00adent appli\u00adca\u00adtions. Fenton performs well in sustain\u00adabil\u00adity and cost terms by comparison:<\/p>\n