High-concentration wastewater
Thread Content
I recently met an engineer surnamed Gao from a company in Shanghai; he said that a reagent they produce, which is a strong oxidant, when added to high-concentration wastewater and left to aerate for 48 hours, can reduce the COD level from 60,000 to around 2,000； The decomposition products are water and CO2; it’s not clear whether this is true or not ；
Most of them are fake. In terms of oxidizing power, the order is: fluorine > hydroxyl radicals > ozone > hydrogen peroxide > permanganate > chlorine dioxide > chlorine... Fluorine is a gas; hydroxyl radicals exist for only a few nanoseconds; ozone is also a gas. If hydrogen peroxide had such an effect, it would have been developed by now. This type of reagent has also been marketed; its mechanism mainly involves interfering with COD monitoring, and it actually lacks the ability to remove contaminants.
Most of them are fake; there are many COD removers that take advantage of the COD measurement method to test TOC as a way of verification
I really haven’t heard of this; it would be great if it were true
Regardless of whether such a strongly oxidizing substance actually exists, if we consider the reaction mechanism and atomic charge balance: 1. The substance added primarily acts as a catalyst; through aeration, it enables the oxygen in the air to fully oxidize the substances present, thereby reducing COD. This conclusion is not valid. 2. It is possible for oxidizing substances to cause oxidation and degradation, but their oxidizing capacity has certain limits. Such substances are indeed necessary for treating wastewater with high COD levels. Not to mention the potential increase in wastewater volume or the formation of other harmful components, the cost associated with using such substances will definitely be high. In summary, the credibility of this claim is low.
What kind of wastewater is it? Do you have a water quality report?
For wastewater with high COD, membrane separation can be used to recover useful organic substances, allowing the wastewater to be discharged up to the required standards. If needed, contact QQ: 568337457
This is a solvent membrane designed specifically for aqueous solutions of organic substances, allowing those organic substances to pass through preferentially