What should I do if the ammonia nitrogen level in the wastewater effluent doesn’t decrease? ?
Thread Content
For gelatin wastewater, the wastewater treatment process includes a regulating tank, air flotation, a coagulation tank, a primary sedimentation tank, hydrolysis-acidification tanks, and AO tanks. The ammonia nitrogen level in the regulating tank is 115, while the COD level is 2000; in the primary sedimentation tank, the ammonia nitrogen level is 116 and the COD level is 1800. Sludge has been added to the system, and it has been in operation for nearly half a month. Currently, the ammonia nitrogen level in the effluent from the secondary sedimentation tank is around 175, with a COD level of about 400. The dissolved oxygen level in the aerobic tank is around 3, and there are bubbles all over the biochemical tank. I seek advice from experts on how to reduce the ammonia nitrogen level! ! !
:'(:'(:'(:'(:'(:'(
1. The removal efficiency of air flotation isn’t high. Is there very little suspended matter in the wastewater from the regulation tank? If so, why use air flotation? It is recommended to see if the removal efficiency of air flotation can be improved. An increase in ammonia nitrogen indicates that the decomposition of certain substances has produced ammonia nitrogen; it is advisable to remove these substances at the source as much as possible. 2. What is the amount of sludge being added? What is the current sludge concentration? If there isn’t enough sludge, it will take some time to cultivate it, or more sludge needs to be added. 3. The dissolved oxygen level is a bit high; it should be kept between 1 and 2. What is the sludge return ratio?
The flotation effect is not very noticeable; currently, the SV30 value is around 15, and the sludge return ratio is about 2:1. I’d appreciate it if anyone with expertise could provide some guidance. Thank you!
An increase in ammonia nitrogen indicates that the organic matter in this water contains nitrogen, and an ammonification reaction has taken place. Just half a month after sludge addition, the COD removal effect will be quite noticeable, but for ammonia nitrogen, the nitrification process needs to be initiated, and this process is slower. Factors such as temperature, alkalinity, dissolved oxygen, and effluent COD need to be considered, as well as whether the hydraulic retention time is sufficient for nitrification to occur This poster needs to take a close look at the materials on nitration tuning.
Sodium hypochlorite, agreed. Blow
The crystalline condensation catalytic oxidation wastewater treatment equipment developed and produced by our company is designed specifically for treating industrial wastewater with high salt content and high concentration. Crystalline salts can be extracted and recovered without the need for high pressure, high temperature, or freezing; there is no salt-containing water required for catalytic oxidation in biochemical systems or membrane treatment. It meets the **Class I wastewater discharge standard with COD ≤ 60 mg/L**. Suitable for various industries such as chemicals, petroleum, metallurgy, machinery manufacturing, pharmaceuticals, food, and starch. Engineer Duan: 13520333227, dxm9359@vip.sina.com.
For this condition, the electrochemical method works too
It seems that so many of these comments come from people without actual experience; follow what I’ve said: for processes other than the SBR process, raise the dissolved oxygen level in the effluent to 4-5, and maintain the pH between 7.5 and 8. If the pH cannot be maintained at this level, add lye. The sludge concentration should be above 50%, and try to avoid sludge discharge in order to ensure a long sludge retention time. After operating in this manner for half a month, the ammonia nitrogen level in the effluent will start to decrease. If the retention time can be kept above 50 hours, the ammonia nitrogen level in the effluent can be reduced to below 10 after one month. To further reduce total nitrogen, an adequate amount of carbon source must be added, with methanol being the best option for removing it.
1. The biochemical system has not been properly adjusted, which is why there is a lot of foam. 2. Nitifying bacteria, needless to say, are completely absent; therefore, ammonia nitrogen will not be discussed.