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231.
含单环芳香烃废水的超声降解实验研究 总被引:6,自引:0,他引:6
利用超声波译水体中的单环芳香烃降解进行探索性试验。结果表明,超声辐照70min,含单环芳香烃废水的降解规律基本遵循一级反应动力学;超声辐照90min,初始浓度为2.295~14.57mg/L的含苯废水,却除率可达到99%以上。 相似文献
232.
人工富集微生物技术对太湖梅梁湾水源地氮磷的去除研究 总被引:3,自引:0,他引:3
采用2种载体(PM和ACP)进行人工富集微生物的方法,来去除太湖梅梁湾水源地水中的氮磷污染物。通过研究不同的载体密度和水力停留时间对去除效率的影响,中试结果表明:当载体密度为13.1%,停留时间为7d,源水中ρ(TN)为2.95~6.41mg·L-1,ρ(NH4 -N)为0.49~3.31mg·L-1,ρ(NO2--N)为0.07~0.51mg·L-1,ρ(TP)为0.084 ̄0.25mg·L-1,ρ(PO4--P)为0.005~0.059mg·L-1的条件下,人工富集微生物技术对TN,NH4 -N,NO2--N,TP,PO4--P的平均去除率最高分别达到22.68%,57.08%,88.83%,45.36%,29.58%,可见利用人工富集微生物技术能有效去除水源地中的氮磷营养盐,对富营养化水源地水体的水质有明显的改善作用。 相似文献
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高压脉冲电晕法治理有机废气实验研究 总被引:15,自引:2,他引:15
介绍了采用高压脉冲电晕法去除乙醇,甲醛,二氧甲灶模拟废气的情况。实验在线一板式电晕反应器内进行,考察了电压峰值,气体浓度,停留时间和含湿量等不同因素对去除率的影响。实验结果表明能达到较好的去除效果。 相似文献
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以生活污水作为处理对象,采用双泥折流板反应器,进行了反硝化除磷的启动运行试验研究。在进水有机负荷为0.5kg/(m^3.d),m(C)lm(N)=5,t=30(+0.5)℃,HRT=11.08h,R=0.4,r=0.38,SRT=20d的条件下,系统对CODCr,TN,TP,氨氮的去除率分别为67%,63%,50%和82%,出水质量浓度分别为70mg/L,18mg/L,2.8mg/L,6.8mg/L.表明采用该装置进行反硝化除磷的研究是可行的。 相似文献
239.
Antimony (Sb) and its compounds, toxic metalloid, have been classified as high-priority pollutants. Increasing Sb released into the water environment by natural processes and anthropogenic activities, which exposure threatens to human health and ecosystems. Therefore, it is of unquestionable importance to remove Sb from polluted water. Keeping in view the extreme importance of this issue, we summarize the source, chemistry, speciation, distribution, toxicity, and polluted situation of Sb about aqueous solution. Then, we provide the recent and common technology to remove Sb, which are based on adsorption, coagulation/flocculation, electrochemical technology, membrane technology, ion exchange, etc. In this review, we focus in detail on the adsorption method, researchers at present have been investigating to discover more advanced, cost-effective, eco-friendly, reusable adsorbents. However, to date the Sb-containing wastewater treatment technologies are not sufficiently developed and most of research have been tested only in controlled lab conditions. Few reports are available that include field studies and applications. We critically analyzed the salient features and removal mechanisms, evaluating benefits and limitations of these technologies, hoping to provide more references for further research. Finally, we considered the Fe- or Mn-based technologies was the most promising technique to remove Sb for field application. 相似文献
240.
There are good prospects for phosphorus recovery from excess sludge by vivianite crystallization while a large number of extracellular polymeric substances in sludge will have impact on vivianite precipitation. In this study, as a representative of extracellular polymeric substance, the effect of sodium alginate (SA) on phosphorus recovery by vivianite precipitation under different initial SA concentrations (0–800 mg/L), pH values (6.5–9.0) and Fe/P molar ratios (1:1–2.4:1) was investigated using synthetic wastewater. The results showed that SA in low concentrations (≤400 mg/L) had little inhibitory effect on the phosphorus recovery rate. However, when the concentration of SA was larger than 400 mg/L, the phosphorus recovery rate decreased significantly with increasing SA concentrations. The inhibition rate of 800 mg/L SA was about 3 times as large as that of 400 mg/L SA. It was worth noting that the inhibitory effect of SA on vivianite precipitation decreased with increasing initial pH and Fe/P molar ratios. Additionally, SA has no obvious influence on the composition of products, but the morphology of harvested crystals was transformed from branches to plates or rods in uneven sizes. 相似文献