| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an organic wastewater treatment method by which organic matters, phosphorus, and nitrogen contained in high concentration organic wastewater containing compounds of phosphorus and nitrogen can be efficiently treated and the generation of wastes is extremely suppressed. SOLUTION: Acid-fermentation of organic wastewater 4 containing phosphorus and nitrogen is carried out in an acid producing tank 1 and methane- fermentation of the resultant wastewater is then carried out in an up-flow type and anaerobic activated sludge-bed type methane fermentation tank 2. Then, a magnesium compound 15 is added to the obtained wastewater, pH of the wastewater is controlled to be 8-10, and the wastewater is stirred and mixed by aeration to recover solid particles 17 of produced ammonium magnesium phosphate. In this way, organic matters, phosphorus, and nitrogen in organic wastewater are removed.</p> |
