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高盐废水的生物处理效率因盐分对活性污泥系统的抑制作用而受到很大的限制。寻求降低盐抑制作用,提高生物处理效率的方法和技术是目前研究的热点。针对SBR工艺处理高盐肝素钠生产废水的活性污泥,从金属离子间的拮抗效应出发,研究了K+、Ca2+和Mg2+3种金属离子对污泥性能的影响。结果表明,K+、Ca2+和Mg2+添加量分别为40、50和150 mg/L时,COD去除率比对照组分别提高了2.8%、8.0%和3.8%,其余添加量下无明显改善;K+、Ca2+和Mg2+添加量分别为100、200和20 mg/L时,氨氮去除率比对照组分别提高了39.8%、9.8%和28.4%,其中Ca2+对氨氮去除效果的改善能力最差,同时在最佳添加量下讨论了这3种金属离子对污泥浓度以及污泥沉降速率的影响。
The biological treatment efficiency of high-salt wastewater is greatly limited by the inhibitory effect of salt on the activated sludge system. Seeking ways to reduce the salt inhibition and improve the efficiency of biological treatment methods and techniques are the current research hot spots. According to the antagonistic effect of metal ions, the effects of K +, Ca2 + and Mg2 + 3 metal ions on sludge performance were studied. The results showed that COD removal rate increased by 2.8%, 8.0% and 3.8% respectively when the K +, Ca2 + and Mg2 + contents were 40, 50 and 150 mg / L, respectively. The ammonia nitrogen removal rate increased by 39.8%, 9.8% and 28.4% respectively when Ca2 + and Mg2 + were 100, 200 and 20 mg / L, respectively. Among them, Ca2 + had the least ability to improve ammonia nitrogen removal efficiency, The effects of these three metal ions on the sludge concentration and the sludge sedimentation rate were discussed under the optimum dosage.