What to do if flocculation does not lead to sedimentation in wastewater treatment?
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The existing wastewater treatment processes involve iron-carbon treatment followed by flocculation using PAC/PAM. However, for one type of wastewater in our company, flocculation does not occur after going through these steps, which leads to problems in the subsequent wastewater treatment process. I would like to ask experts: what could be the reasons for this situation?
Considering the type of flocculant and the dosage ratio, conducting sampling titration tests, or sending the wastewater to flocculant manufacturers can help in selecting the appropriate flocculant.
Your wastewater might need to be neutralized first, right? :lol
Before adding the flocculant, it is necessary to adjust the pH value. A pilot test using the flocculant is conducted to determine which type is effective, after which it is added on a larger scale. Under normal circumstances, as long as the dosage of wastewater is properly adjusted, there should be no problems.
It should be related to the pH value; some flocculants cannot be used in acidic conditions. Talk to the manufacturer about this
Flocculants are divided into cationic and anionic types; it depends on the requirements for future procurement whether there are any differences in selection. Additionally, when the mixing ratios change, the tendency to settle may decrease from easy settlement to difficult settlement
The reason for this phenomenon is mostly due to an inappropriate proportion of the flocculant used. The dosage ratio can be determined through pilot tests, or the manufacturer can be consulted at critical moments to choose other flocculant products
Send the sample to the manufacturer so that they can help you select the appropriate model.
If the flocs can float on the water surface like cooked egg whites, it is also convenient to automatically skim them out during the flow process and send them to a plate and frame filter press for filtration.