Wang Yong, Li Wei-Guang, Yang Li, Su Cheng-Yuan
National Engineering Research Center of Urban Water Resources, Harbin 150090, China.
Huan Jing Ke Xue. 2013 Feb;34(2):604-10.
In the batch experiments inoculated with activated sludge from tannery wastewater treatment plant, biodegradation characteristics and kinetics of three tanning agents, naphthalene-2-sulfonic sodium, tannic acid and bayberry tannin, were studied under aerobic and anaerobic conditions. And the aerobic/anaerobic biodegradation laws of real tannery wastewater with respect to COD change were also investigated using the same batch experiments. The results showed aerobic degradation was superior to anaerobic degradation for tanning agent removal and mineralization. The removal rates of naphthalene-2-sulfonic sodium, tannic acid and bayberry tannin by aerobic biodegradation were >90% , >90% and 50% -75% , respectively whereas 10%-40%, >95% and 20% -30%, respectively by anaerobic degradation. In terms of COD removal about tannic acid biodegradation, the removal rates under aerobic and anaerobic conditions were >75% and < 75% ,respectively. The first-order kinetic constants during aerobic biodegradation of tannic acid and bayberry tannin were slightly influenced by initial concentrations while initial concentration had a significant effect on the first-order kinetics rate in the case of naphthalene-2-sulfonic sodium aerobic-biodegradation because naphthalene- 2-sulfonic sodium with initial concentration >or= 70 mg.L-1 was toxic to microorganism leading to a significant decline of kinetic constants. Biodegradation of real tannery wastewater under aerobic and anaerobic conditions represented obvious stage characteristics and the COD concentration had a good linear correlation with reaction time in the phases of fast degradation and slow degradation. The aerobic maximum specific degradation rate wqas 11.6 times higher of anaerobic degradation.
在接种制革废水处理厂活性污泥的批次实验中，研究了萘 - 2 - 磺酸钠、单宁酸和杨梅单宁三种鞣剂在好氧和厌氧条件下的生物降解特性及动力学。并采用相同的批次实验研究了实际制革废水在好氧/厌氧条件下关于化学需氧量（COD）变化的生物降解规律。结果表明，对于鞣剂的去除和矿化，好氧降解优于厌氧降解。萘 - 2 - 磺酸钠、单宁酸和杨梅单宁的好氧生物降解去除率分别>90%、>90%和50% - 75%，而厌氧降解的去除率分别为10% - 40%、>95%和20% - 30%。就单宁酸生物降解的COD去除而言，好氧和厌氧条件下的去除率分别>75%和<75%。单宁酸和杨梅单宁好氧生物降解过程中的一级动力学常数受初始浓度影响较小，而对于萘 - 2 - 磺酸钠的好氧生物降解，初始浓度对一级动力学速率有显著影响，因为初始浓度≥70mg·L-1的萘 - 2 - 磺酸钠对微生物有毒，导致动力学常数显著下降。实际制革废水在好氧和厌氧条件下的生物降解呈现明显的阶段特征，在快速降解和缓慢降解阶段，COD浓度与反应时间具有良好的线性相关性。好氧最大比降解速率是厌氧降解的11.6倍。
