【摘要】 采用低压纯氧设备在排污口应急处理进行了应用研究,结果发现:纯氧曝气能够快速提升黑臭水体的溶解氧,改善水体的感官效果。0.5 h可以将水体的溶解氧从0.15 mg/L提高到4.21 mg/L,5 h内水体中的溶解氧达到32.73 mg/L;纯氧曝气可以使水体的颜色快速变化透明度显著增加,0.5 h水体黑色变成黑白色,2 h水体变成淡黄色,水体透明度从5 cm提高到50 cm;纯氧曝气可以在10 h内将污水中COD_Cr从48.03 mg/L消减到22.71 mg/L,消解率为53%。纯氧曝气可以在10 h内将污水中TP从5.48 mg/L消减到3.71 mg/L,消解率为31.8%。纯氧曝气对氨氮的去除效果不好,曝气后水体中的氨氮升高了13.1%。更多还原

【Abstract】 This paper was to aim at illustrating the effects of pure oxygen aeration on the emergency treatment of black and odorous water which was discharged from thesewage outfalls in river channel. The results revealed that pure oxygen aeration could rapidly increase dissolved oxygen in black and odorous waterbody and thus improve the sensory view of water body. The concentration of dissolved oxygen could be raised to 4.21 mg/L in water after0.5 hours of aeration with pure oxygen, and even reach up to 32.73 mg/L after 5 hours aeration. The transparency of water body was also dramatically increased to 5 cm and then 50 cm with 0.5 hours and 2 hours aeration, respectively. The color of water gradually changed to khaki(0.5 hours) and yellowish(2 hours) accordingly.In addition, the concentration of chemical oxygen demand and total phosphate were decreased by 53% and 31.8% respectively with an aeration for 10 hours. However, it was unexpected that theammonia concentrationswere increased by 13.1% after the aeration, which implies that the aeration of pure oxygen may have little effect on ammonia nitrogen removal.更多还原