Are there any simple and practical ways to remove COD?
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Are there any simple and practical ways to remove COD?
Simple: adsorption by filtering media. I conducted an experiment earlier in which special filtering media could reduce COD levels from over 10,000 to around 100 in one go. However, its practicality depends on the requirements of the client; the operating costs are relatively high. The filtering media can be regenerated, but it still needs to be replaced too frequently compared to other options. Note: The raw material for the filtering material is coal; once it becomes unavailable, it can simply be burned as coal. The cost is around 1,000 yuan per ton
One solution per type of wastewater; there is no universal treatment process. The principles for selecting a process are effectiveness and cost-effectiveness.
Yes, the simplest method is to use adsorbent materials, with activated carbon being the most straightforward option. In fact, treating wastewater is neither the simplest nor the most complicated task; what’s crucial is to choose a suitable treatment method by taking into account various factors such as the quality of the water, the raw materials used, the geographical location, and the skills of the operators.
Adsorption? Filter? It’s hard to say without knowing the specific data on site; for the chemical wastewater here, adsorption is used: o
Simply use physical methods, such as adsorption, precipitation, and so on~
There are physical, chemical, and biochemical methods; the most thorough one is the biochemical method, which converts COD into carbon dioxide and water.
Using waste to treat more waste: if there is no boiler, wastewater is used for slag flushing, and the contact time is appropriately extended to take advantage of the ash’s ability to absorb COD. See if there are any factories in the vicinity that need your factory’s wastewater as raw material, and offer it to them for free or at a price.
Principles for selecting a process: effectiveness, cost-effectiveness
cod=2000mg/L. Water sample 1 is a glucose solution. Water sample 2 is a formalin solution. For the same COD, there are common simple and practical methods. Also, my old view is that environmental protection is all about getting value for your money.
I think it depends on the range of COD that needs to be treated and the treatment efficiency required； If the goal is to reduce COD to a very low level, a combination of adsorption and membrane technology can be used.
Activated carbon adsorption might be the simplest method.
The plan and investment needs to be determined based on the intended use, as well as the water quality
It depends on the nature of the wastewater; if it is circular in structure, biological fermentation is less effective for removal, while adsorption is a better option. This post was last edited by li*ch1968 on 2009-4-12 at 12:18.]
It’s nothing more than enrichment and reprocessing, or direct microbial treatment. However, the latter does not meet the simple requirements; so let’s go with the former and think about something else after adsorption.
Incinerators provide the most thorough burning. Won’t coal adsorption introduce new organic substances?
There are many viable methods for simply removing COD, such as activated carbon adsorption, but finding an economical and efficient method is not easy. Biological methods are the most thorough approach, yet they also have limitations; they generally don’t work well in cases with high salt content. In short, it’s not an easy task.
Although they are both COD, the types of substances are actually very different. Setting aside practical material analysis, it’s not quite the right approach to discuss methods merely by referring to COD in a general sense.
According to the environmental protection industry: there is no wastewater that cannot be treated; the key lies in investment and operating costs! The simplest methods are burning and evaporation, but they are also the most costly.