(1. 中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083；
2. 中南大學(xué) 生物冶金教育部重點(diǎn)實(shí)驗(yàn)室，長沙410083)
摘 要: 難處理含硫金精礦的生物預(yù)氧化方法前景廣闊，但是由于生物預(yù)氧化反應(yīng)速度慢、氧化周期長等因素的存在，嚴(yán)重影響該法在實(shí)際應(yīng)用中的推廣。因此，研究生物預(yù)氧化技術(shù)的強(qiáng)化方法已成為推動(dòng)該技術(shù)發(fā)展的關(guān)鍵因素。為達(dá)到強(qiáng)化目的，總結(jié)了3個(gè)方面的強(qiáng)化策略：首先，分析了微生物群落的組成優(yōu)化，通過組合氧化能力更強(qiáng)的微生物群落來達(dá)到強(qiáng)化目的；其次，控制溶液的化學(xué)條件，以保證微生物的代謝和功能發(fā)揮；最后，對預(yù)氧化工藝進(jìn)行改進(jìn)，構(gòu)建更高效的生化反應(yīng)條件。通過這些方法，難處理含硫金精礦生物預(yù)氧化效果可望得到有效強(qiáng)化。
關(guān)鍵字: 生物預(yù)氧化；難處理含硫金精礦；微生物群落；化學(xué)條件控制；兩步氧化法
（1. School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Biological Metallurgy, Ministry of Education, Central South University, Changsha 410083, China）
Abstract:Growing demand of gold makes it essential to recover gold from refractory gold-bearing sulfide concentrates. Bio-oxidation method of refractory gold-bearing concentrates is a promising technology, but the widely utilization of bio-oxidation in the gold pre-treatment industry is limited by the low reaction rate and long oxidation cycle. Therefore, the intensifying approaches become the key factor to improve this technology. To achieve the intensification goal, three strategies were summarized in this work. Firstly, optimization of the microbial community was analyzed with the purpose of constructing more promising mixed cultures. Secondly, the chemical conditions were controlled to enhance the metabolism and function of the microorganisms. Thirdly, new processing approaches were improved to create more favorable conditions for biological and chemical reactions. When the bio-oxidation process is subjected to these strengthening strategies, the bio-oxidation efficiency will be elevated significantly.
Key words: bio-oxidation; refractory gold-bearing sulfide concentrate; microbial community; chemical condition control; two-step oxidation approach
