Wang Hangyao, Zhou Qin, Zhang Guangming, Yan Guokai, Lu Haifeng, Sun Liyan
School of Environment and Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China E-mail:
Changjiang Water Resources Protection Institute, Wuhan, Hubei 430051, China.
Water Sci Technol. 2016;74(3):616-24. doi: 10.2166/wst.2016.254.
A novel process coupling photosynthetic bacteria (PSB) with electrodeionization (EDI) treatment was proposed to treat high ammonia wastewater and recover bio-resources and nitrogen. The first stage (PSB treatment) was used to degrade organic pollutants and accumulate biomass, while the second stage (EDI) was for nitrogen removal and recovery. The first stage was the focus in this study. The results showed that using PSB to transform organic pollutants in wastewater into biomass was practical. PSB could acclimatize to wastewater with a chemical oxygen demand (COD) of 2,300 mg/L and an ammonia nitrogen (NH4(+)-N) concentration of 288-4,600 mg/L. The suitable pH was 6.0-9.0, the average COD removal reached 80%, and the biomass increased by an average of 9.16 times. The wastewater COD removal was independent of the NH4(+)-N concentration. Moreover, the PSB functioned effectively when the inoculum size was only 10 mg/L. The PSB-treated wastewater was then further handled in an EDI system. More than 90% of the NH4(+)-N was removed from the wastewater and condensed in the concentrate, which could be used to produce nitrogen fertilizer. In the whole system, the average NH4(+)-N removal was 94%, and the average NH4(+)-N condensing ratio was 10.0.
提出了一种将光合细菌（PSB）与电去离子（EDI）处理相结合的新工艺来处理高氨废水并回收生物资源和氮。第一阶段（PSB处理）用于降解有机污染物并积累生物质，而第二阶段（EDI）用于脱氮和回收。第一阶段是本研究的重点。结果表明，利用PSB将废水中的有机污染物转化为生物质是可行的。PSB能够适应化学需氧量（COD）为2300mg/L、氨氮（NH4(+)-N）浓度为288 - 4600mg/L的废水。适宜的pH为6.0 - 9.0，平均COD去除率达到80%，生物质平均增加9.16倍。废水COD去除与NH4(+)-N浓度无关。此外，接种量仅为10mg/L时PSB仍能有效发挥作用。经PSB处理后的废水再在EDI系统中进一步处理。超过90%的NH4(+)-N从废水中去除并浓缩在浓缩液中，可用于生产氮肥。在整个系统中，平均NH4(+)-N去除率为94%，平均NH4(+)-N浓缩比为10.0。
