Discussion on advanced treatment processes
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When the BOD values are 19.7 mg/l, 17 mg/l, 25.4 mg/l, and 25.1 mg/l respectively, and the COD values are 125 mg/l, 108 mg/l, 132 mg/l, and 125 mg/l respectively, which advanced treatment process should be chosen to reduce the COD level to below 50 mg/l? Please discuss.
I think it first depends on what type of wastewater it is, what the COD level is, and whether it consists mainly of large organic molecules or small organic molecules. If organic macromolecules are the main component, considering the use of flocculants combined with co-flocculants is a good option; it is the preferred approach as it is the cheapest, and the removal rate can exceed 80%! If organic small molecules are the main component, aerobic or anaerobic treatment processes can be chosen depending on the concentration level ； If it is a substance that is difficult to degrade, it is necessary to first use strong oxidants for oxidation before proceeding with biochemical treatment. Also, if it contains heavy metals, pretreatment is necessary. That’s roughly it; if your wastewater is of a special type, then a plan needs to be devised based on the properties of that wastewater.
It quotes the remarks of zhizhouzhuren to provide the original poster with some ideas.
Thank you to the person above; how can one determine whether it is a macromolecule or a small molecule?
Based on the comparison of BOD and COD provided, biochemical treatment is not suitable; in other words, the wastewater should consist mainly of inorganic substances. The specific treatment method should be determined based on its actual composition, involving sedimentation. Oxidation. It should be used quite often
Fenton can handle it, and the catalytic oxidation catalyst we developed can also do the job. Coking or gasification wastewater with a COD of 150 mg/L can be treated biologically without any major issues.
I think choosing the method of chemical deep treatment, that is, using the M180 treatment agent, will achieve the desired result. It performs quite well in our factory at present, and the processing cost is also low, meeting the design and usage requirements.
Isn’t that M180 aluminum ferric chloride polymer? It’s not used in every situation. 7# cjxfpmx
The appropriate method depends on the composition of the wastewater; moreover, the volume of water is also an important factor/
I’m really curious about how the original poster can determine whether wastewater contains organic or inorganic substances based on BOD and COD I’m new to water treatment; please give me your guidance.