Treating Wastewater With Cu²⁺, Zn²⁺ With Magnetic Field-Magnetotactic Bacteria Comprehensive Technology

Magnetic Field-Magnetotactic Bacteria(MTB) Comprehensive Technology removing heavy mental from wastewater has become a new hotspot reeently. It not only has the advantages of high speed and high seleetivity but also donotereate the second Pollution, microorganism which adsorb heavy metal ions can be easily isolated from the wastewater. But there are few reports concerning application of the technologies in dealing with the wastewater.In the study of this thesis,the result using magnetic separators absorbed Cu²⁺,Zn²⁺ indicated the method was effective and feasible.The results of the research show us:1) MTB are more easily acclimated in slightly aerobic condition.the quantity and magnetism of MTB are more greater in this condition.2) The two strains named J-1,J-3 can remove Cu²⁺,Zn²⁺. Remove efficiency of J-1 is 61.2%,55.7%;and J-3 is 5.2%,41.8%。J-1 have higher remove efficiency.3) The best condition absorb Cu²⁺ is pH=5,T=25℃,t=1.5h,MTB=60g/l。the best condition absorb Zn²⁺ is pH=5,T=25℃, t= 2h,MTB=80g/l。A comparison of different isotherm models revealed that Langmuir model fitted the experimental data best.4) When Cu²⁺,Zn²⁺coexist in water the remove efficiency descend 36.76%,24.5% respectively and MTB adsorb Zn²⁺ preferential.5) Use magnetic separators dealing with the wastewater.the OD600 have descend and the remove efficiency of heavy metal irons have arised .