摘要
通过间歇曝气形成微氧环境让SRB和CSB实现共生,使含硫酸盐有机废水中硫酸根最终转化成单质硫达到脱硫目的。研究考察了曝气量对SRB还原和CSB氧化的影响,确定了合适的曝气强度和水力停留时间,使得单质硫占系统内总硫比值最大。实验结果显示,在进水COD/SO24-=2 000/1 500 mg/L、曝气开关时间为2 s/2 min、生化时间为10 h时,单质硫产率最大,为89.53%,SO24-浓度降至最低值72.7 mg/L,还原率达95.1%,此时脱硫效果较好。
Desulfuration of organic wastewater containing sulfate was realized by transforming the sulfate to elementary sulfur in a micro-aerobic condition resulted from intermittence aeration, in which sulfate-reducing bacteria （SRB） and colorless sulfur bacteria （CSB） kept symbiotic. The effect of oxygen amount on the reduc- tion of SRB and oxidization of CSB was investigated. The optimal aeration intensity and hydraulic retention time under which the maximum ratio of elementary sulfur to the amount of total sulfur occurred were found. The re- sults indicated that, for an influent with COD/SO24- = 2 000/1 500 mg/L, after being processed in such a system with the aeration switching time of 2 s/2 rain and biochemical time of 10 h, the maximum productivity of elemen- tal sulfur of 89.53% was achieved, with the minimum sulfate concentration of 72.7 mg/L, and a sulfate reduction rate of 95. 1%.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第1期306-310,共5页
Chinese Journal of Environmental Engineering
关键词
脱硫
微氧
硫酸盐还原菌
无色硫细菌
单质硫
desulfuration
micro-aerobic
sulfate-reducing bacteria
colourless sulfur bacteria
elemental sulfur
