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本文分析了棉秆、棉籽壳、棉籽饼和棉油皂脚的开发途径和利用技术,并从我国经济现状和技术水平出发,提出了应该重点开发的领域。 相似文献
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Wet air oxidation (WAO) and catalytic wet air oxidation (CWAO) of slaughtered animal byproducts (ABPs) were investigated. Two
step experiment was carried out consisting of a non-catalysedWAO run followed by a CWAO run at 170–275°C , 20 MPa, and reaction
time 180 min. TheWAO (1st step) of sample (5 g/L total organic carbon (TOC)) yielded (82.0 4)% TOC removal and (78.4 13.2)%
conversion of the initial organic-N into NH4
+-N. Four metal catalysts (Pd, Pt, Rh, Ru) supported over alumina have been tested in
catalytic WAO (2nd step) at elevated pH to enhance ammonia conversion and organic matter removal, particularly acetic acid. It was
found that the catalysts Ru, Pt, and Rh had significant e ects on the TOC removal (95.1%, 99.5% and 96.7%, respectively) and on
the abatement of ammonia (93.4%, 96.7% and 96.3%, respectively) with high nitrogen selectivity. The catalyst Pd was found to have
the less activity while Pt had the best performance. The X-Ray di raction analysis showed that the support of catalyst was not stable
under the experimental conditions since it reacted with phosphate present in solution. Nitrite and nitrate ions were monitored during
the oxidation reaction and it was concluded that CWAO of ammonia in real waste treatment framework was in good agreement with
the results obtained from the literature for ideal solutions of ammonia. 相似文献
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氧化镁湿法脱硫技术相比其他烟气脱硫技术具有独特的技术优势,但其脱硫副产品一直无法得到合理的回收利用,制约了该脱硫技术的广泛推广。目前,大部分采用该技术的企业选择将副产品直接丢弃,无法为企业创造利润,同时也造成环境污染。根据公司现状,研究合适的脱硫副产品氧化制硫酸镁工艺流程,不仅可以为企业创造可观的经济效益,也降低了溶液中的COD含量,对吸收塔、浆液循环泵等设备的磨损也将大大降低。 相似文献