These two methods of phosphorus removal are the unique treatment process of weak water, which is a high-efficiency phosphorus removal process developed by the team of weak water Promise Tsinghua University and the Aachen University of Technology in Germany to solve the problem of large amount of traditional calcium salt dephosphorization sludge and struvite. The problem of incomplete phosphorus removal is also a very good method for the hypophosphite in chemical nickel. Phosphorus removal agent _ orthophosphate _ hypophosphite research and development background: These two methods of phosphorus removal are the unique treatment process of weak water, which is the high-efficiency phosphorus removal process developed by the weak water promise Tsinghua University team and the German Aachen University of Technology. It solves the problem of large amount of traditional calcium salt dephosphorization sludge and incomplete removal of phosphorus by struvite method, and also proposes a very good method for hypophosphite in chemical nickel. Positive phosphorus treatment method 1. Dissolve the orthophosphorus remover into a 10% solution. 2. Dissolve the phosphorus removal flocculant into a 0.1% solution. 3. The amount of the positive phosphorus treatment agent is 10-15 times that of phosphorus. For example, wastewater contains 100 ppm of phosphorus, and the amount of water per ton is 1-1.5 kg (solid). The amount of phosphorus removal flocculant is 10 g / ton of water. 4. Take 500ml of wastewater, adjust the pH to 4.5-5.5, add the remover according to the phosphorus content, and stir for 10 minutes. Add 2 drops of dephosphorization flocculant and stir for 3 minutes. 5. Precipitate for half an hour. The supernatant was filtered to measure phosphorus. The advantage of this method is phosphorus removal: the amount of sludge is small, the pH is low, and there is a certain ability to remove COD. The phosphorus removal rate can reach over 99.7%. Secondary phosphorus treatment method 1. The secondary phosphorus removal agent can be directly added with dry powder. 2. Dissolve the phosphorus removal flocculant into a 0.1% solution. 3. Prepare 27% hydrogen peroxide. 4. The amount of the secondary phosphorus treatment agent is 10-15 times that of phosphorus. For example, wastewater contains 100 ppm of phosphorus, and the amount of water per ton is 1-1.5 kg (solid). The amount of hydrogen peroxide is 10-12 times that of phosphorus; the amount of phosphorus flocculating agent is 10 g/ton of water. 5, take 500ml of wastewater, adjust the pH = 2.5-3.5, add the remover according to the phosphorus content, then add hydrogen peroxide, stir for 30 minutes. Adjust pH = 4.5-5.5, add 2 drops of phosphorus removal flocculant, and stir for 3 minutes. 6. Precipitate for half an hour. The supernatant was filtered to measure phosphorus. The advantage of this method is phosphorus removal: the amount of sludge is small, the pH is low, and there is a certain ability to remove COD. The phosphorus removal rate can reach over 99.7%.
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