In the past ten years of dry sewage treatment, the question of ammonia nitrogen exceeding the standard has been asked not a thousand times but 800 times.To put it bluntly, most people add medicine frantically when they see that ammonia nitrogen is high, and sodium hypochlorite and carbon sources are all messed up, but the water is still not up to standard after the money is spent.It's probably not a problem with the equipment that the ammonia nitrogen exceeds the standard, but you don't understand why it's so high.
DIEN sewage treatment equipment
Whether the ammonia nitrogen is high or not, let's see if the carbon source is enough.
Nine out of ten high ammonia nitrogen in domestic sewage is due to insufficient carbon sources.Denitrification requires carbon, and if the carbon is not enough, ammonia and nitrogen cannot be converted.When many sewage treatment equipment is designed, the amount of carbon source investment is not counted correctly, or no one cares about the carbon source investment after operation.If you go to see those factories where the ammonia and nitrogen output are stable and up to standard, the carbon source investment and addition are all controlled by automation, not by feeling.To put it bluntly, if you are still adjusting the carbon source by hand, it is really unfair that the water output is not up to standard.
In the fall of 2023. a sewage treatment station in a residential area in the northern suburbs of Xi'an was found with a daily treatment capacity of 50 tons. Ammonia nitrogen has been stuck at 8mg/L and cannot come down. The standard is below 5mg/L.Their previous approach was to increase carbon sources drastically, and they spent more than 4.000 yuan on carbon sources in a month.When I looked at it in the past, the carbon source dosing pump was good, but the controller was not connected, and it was all manually watched and added.I asked them to connect the automatic dosing, and the amount of carbon source was directly cut in half, and the ammonia nitrogen dropped below 4mg/L in three days.You see, the problem is not in medicine, but in people.
A few emergency soil methods can really be used at critical moments
Ammonia nitrogen suddenly soared, and I couldn't wait to adjust the system. There were several emergency moves.Adjust the pH to between 7.5 and 8.0. ammonia nitrogen is easier to blow off under alkaline conditions, and the aeration volume is increased, which can take away part of it.I can't say how effective this can be. Anyway, in the cases I have seen, the emergency drop of two or three mg/L is not a big problem.Another trick is to increase the reflux ratio and pump back more sludge from the second sink, so that the microorganisms in the hypoxic zone can eat more ammonia and nitrogen.This trick does not cost money, but it needs the support of your equipment.Many small sewage treatment equipment does not have a reflux design at all, and it is useless to use this trick.
DIEN sewage treatment equipment
Dosing is not a panacea, don't be fooled
When it comes to the price of sewage purification equipment, many people come up cheaper than anyone else.I just want to ask, have you calculated the cost of cheap equipment and medicines?Some equipment hosts are cheap, but the potion consumption is two or three times that of others. The extra money spent in a year is enough to buy another one.Our DIEN's equipment can do everything from sewage treatment to reverse osmosis. Carbon source dosing and automation control are standard, so you don't need to toss it later.Ammonia, the more you drag it, the more difficult it is to get it.Is the ammonia nitrogen stable on your station now?Say the number in the comment area, let me analyze it for you
