Combined treatment process for high-concentration ammonia nitrogen waste water
A technology for ammonia nitrogen wastewater and a treatment method, which is applied in the field of high-concentration ammonia nitrogen wastewater treatment, can solve the problems of low ammonia nitrogen load, high ammonia nitrogen wastewater treatment cost, complicated operation, etc., and achieves high ammonia nitrogen load capacity, easy control of reaction conditions, and low energy consumption. Effect
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[0016] Embodiment one: first add 320g quicklime CaO to 25L waste water containing ammonia nitrogen 6500mg / L in the adjustment tank, and the pH value of waste water recorded at this time is adjusted to 12; then the waste water is passed into the stripping tower; the top of the stripping tower A sprinkler is installed, and a Raschig ring is arranged in the tower body; the waste water forms a thin liquid flow through the sprinkler and flows through the Raschig ring arranged in a zigzag path; at the same time, air is blown into the aeration port at the bottom of the tower to make the Raschig ring The surface is in contact with the gas-liquid phase; then let the blown off tail gas enter the absorption pool filled with waste hydrochloric acid or waste sulfuric acid to absorb part of the ammonia nitrogen. The concentration of ammonia nitrogen in the eluted effluent measured at this time is 2300 mg / L, and the removal rate of ammonia nitrogen is about 65%.
[0017] Then, the effluent a...
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