硫粉投量对生物沥滤疏浚底泥脱水性能的影响  

Effect of Sulfur Powder Dosage on Dewatering Ability of Dredged Sediment by Bioleaching

作　　者：刘建宏[1] 石明岩[1] 刘恒甫[1] 简国丹 周曦琳 石云峰 LIU Jianhong SHI Mingyan LIU Hengfu JIAN Guodan ZHOU Xilin SHI Yunfeng(College of Civil Engineering, Guangzhou University Guangzhou 510006)

机构地区：[1]广州大学土木工程学院 [2]广州市金龙峰环保设备工程有限公司

出　　处：《工业安全与环保》2017年第10期70-72,共3页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(51308136);广东省水利科技创新项目(2014-15);国家级大学生创新训练项目(201511078012);广东省大学生创新训练项目(201611078069);广东省研究生教育创新计划项目;天河区科技计划项目(201605YH026)

摘　　要：硫粉作为能源物质之一,可同时被氧化亚铁硫杆菌和氧化硫硫杆菌所利用,其投量对生物沥滤效果起决定性作用。为此,保持5g/L黄铁矿粉和10%接种物投量不变,在1~4g/L范围内改变硫粉投量,通过摇瓶试验分析了硫粉投量对生物沥滤疏浚底泥脱水性能的影响及其作用机理。试验得到:当硫粉投量为2g/L时,比阻由2.81×10^(12)mg/kg降至0.92×10^(12)mg/kg,降幅(81.82%)最大,该投量为试验条件下的硫粉最佳投量。此时pH、Fe^(3+)和SO_4^(2-)变化率也达到最大或接近最大,说明底泥脱水性能的改善是生物沥滤产生的氧化、酸化和混凝协同作用的结果。As one of the energy materials, sulfur powder can be used for acidithiobacillus ferroxidans and acidithiobacillus thiooxidans at the same time and its dosage plays a decisive role in bioleaehing. Therefore, keeping the dosage of 5g/L pyrite and 10% inoculum unchanged and sulfur powder varied from 1g/L to 4g/L, it is analyzed the effects of sulfur powder on the dewatering ability of dredged sediment in bioleaching through the flask experiment, as well as its mechanisms. The result shows that the specific resistance to filtration decreases from 2.81 × 1012mg/kg to 0. 92 × 1022 mg/kg and the declining （81.82% ） is greatest when the sulfur powder dosage is 2g/L, which is the best addition under the condition of experiment. At this point, the changes of pH, Fe3＋ and SO42- reach or close to the maximum and it is illustrated that improvement of the dewatering ability of sediment is the cooperative results of oxidation, acidification and coagulation produced form bioleaching.

关 键 词：硫粉 生物沥滤 疏浚底泥 脱水 

分 类 号：X703[环境科学与工程—环境工程]