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BIOLEACHING PROCESS OF CHROMIUM, NICKEL, ZINC AND LEAD FROM ELECTROPLATING INDUSTRIAL WASTE SLUDGE USING BUBBLE COLUMN
BIOLEACHING PROCESS OF CHROMIUM, NICKEL, ZINC AND LEAD FROM ELECTROPLATING INDUSTRIAL WASTE SLUDGE USING BUBBLE COLUMN
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机译：鼓泡柱电镀电镀工业废渣中铬，镍，锌和铅的浸出工艺
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摘要
Bioleaching of zinc, nickel, chromium and lead from the electroplating industrial sludge was made in this process. The present innovation of the process deals with the operating parameters of the bioleaching process conducted in bubble column with dimensions of diameter 5 cm and height 30 cm. Isolated sulphur grown Acidothiobacillus ferrooxidans was used for the bioleaching purpose. Initially the culture was adapted to the sludge for the better leaching performance. The media constituents parameter are elemental sulphur - 6g/l, MgSO4.7H2O - 0.5 g/1, (NH4)2SO4 - 3 g/l and KH2PO4 - 0.5 g/1, KCl - 0.1 g/1 with initial pH 3 and air flow rate one litre per minute. 300 ml of working volume, 5% (w/v) of dried sludge and 10% (v/v) of inoculum was also carried out for the process. The bioleaching process with these parameters have showed the better results in efficiencies of zinc, nickel, chromium and lead from the electroplating industrial sludge and leaching rate.
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机译：在此过程中，从电镀工业污泥中进行了锌，镍，铬和铅的生物浸出。该方法的当前创新涉及在直径为5cm，高度为30cm的鼓泡塔中进行的生物浸出过程的操作参数。分离的硫生长的酸性氧化铁硫杆菌用于生物浸出目的。最初，使培养物适应污泥以获得更好的浸出性能。介质成分参数为元素硫-6 g / l，MgSO4.7H2O-0.5 g / 1，（NH4）2SO4-3 g / l和KH2PO4-0.5 g / 1，KCl-0.1 g / 1（初始pH 3）和空气流量每分钟一升。该工艺还进行了300 ml的工作体积，5％（w / v）的干污泥和10％（v / v）的接种物。具有这些参数的生物浸出过程在电镀工业污泥的锌，镍，铬和铅的效率和浸出率方面显示出更好的结果。
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