Abstract:

With different proportion of the slag and blast furnace slag as raw material, slag particles adsorbent was made by mixing raw material into the ball and then roasting the ball. The static and dynamic adsorption test was used to investigate the adsorption performance to biogas slurry of NH+4N, TN, TP and COD. The results showed that pH, adsorption time and density of biogas slurry had significant influence on the slag particles adsorbent of different proportion adsorbing biogas slurry TP. Under proper conditions, the biogas slurry TP removal rates of different proportion of slag granules were all over 90%. Langmuir, Freundlich and Temkin models were good descriptions for the isothermal adsorption law of slag particles adsorbent for wastewater TP. The removal rates of NH+4N, TN, TP and COD of wastewater in dynamic adsorption test were all around 90%. Among them, the removal effect of No. ① mixed slag with slag and steel slag ratio 4∶1 was the best. Its average removal rate reached the discharge standard as 99.24%, 96.75%, 99.94% and 8971%, respectively. Slag particles could be used as adsorption material for treating NH+4N, TN, TP and COD.

Key words: slag, steel slag, adsorption quantity, phosphorus absorption rate

摘要：

以不同配比的炉渣和钢渣为原料，经混合、成球、焙烧制成炉渣颗粒吸附剂。通过静态吸附试验和动态吸附试验，考察了该吸附剂对沼液中NH+4N、TN、TP和COD的吸附性能。结果表明，沼液的pH、吸附时间、沼液的浓度等因素对不同配比的炉渣颗粒吸附剂吸附沼液中TP均有显著影响。在适当条件下，不同配比的炉渣颗粒对沼液中的TP去除率均在90%以上。炉渣颗粒吸附剂对废水中TP的等温吸附规律可用Langmuir、Freundlich和Temkin模型进行较好的描述。动态吸附试验中废水中NH+4N、TN、TP、COD去除率均在90%左右，其中以炉渣和钢渣质量比为4∶1(①号)的混合渣去除效果最好，平均去除率分别为99.24%、9675%、99.94%、89.71%，可达标排放。炉渣颗粒可以作为吸附材料处理沼液中的NH+4N、TN、TP和COD。

关键词: 炉渣;钢渣;吸附量;吸磷率