How to treat waste liquid containing sulfuric acid
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This post was last edited by zfc318 on 2009-11-2 20:06. How should sulfuric acid-containing waste liquids be treated to avoid environmental pollution?
If the sulfuric acid waste liquid does not contain toxic or hard-to-degrade substances and has a sulfuric acid content of over 50%, it can be considered for use by phosphate fertilizer plants; it can also be used to neutralize the alkaline wastewater from other enterprises, and its concentration and reuse by the same facility is also an option.
Neutralize first! ! ! ! ! ! !
This post was last edited by zfc318 on 2009-11-2 at 20:07. Few people ask so seriously about how to avoid environmental pollution. Simply disposing of the sulfuric acid waste isn’t difficult; but what is the organic content in your waste? What are the values of indicators like COD? Generally speaking, to truly resolve this issue completely, I recommend incineration followed by the recovery of concentrated sulfuric acid. This is the best way to ensure complete harmlessness. As for other measures, well… to be honest, I’m afraid some people might get upset if I mention them. Most of such measures are just meant to make money, or they serve as a cover-up to transfer waste elsewhere.
This post was last edited by zfc318 on 2009-11-2 20:07. The conditions mentioned by the original poster are rather vague, so it’s difficult to give you an answer! Please give a general description of the composition of the waste liquid. Sure, I’ll give you some advice!
I’m not sure how much waste acid the poster has; if there is a large amount, it should be sent to a facility qualified to handle hazardous waste. If the quantity is small, neutralization can be used followed by disposal at a wastewater treatment plant. For reference only
In my opinion, recycling generally has the least impact on the environment and can help reduce operating costs. However, I am not aware of the specific details regarding sulfuric acid mentioned by the original poster, so I cannot offer any better suggestions
First, consider whether recycling is possible so that the material can be used in production after processing; however, the costs will be higher accordingly (there should be specialized manufacturers of such equipment)； Next, consider whether it can be recycled and reused in other processes, such as the treatment of printing and dyeing wastewater ； Considering the issues that need to be addressed, neutralization treatment is the main approach; it is also necessary to check for the presence of other pollutants before carrying out comprehensive treatment.
Shanghai Dijia Environmental Protection Engineering Co., Ltd. has carried out many such projects for sulfuric acid reuse.
If there is no organic waste, calcium hydroxide can be used for neutralization; it’s inexpensive.
It mainly depends on the concentration and whether there are any heavy metals.