食品与发酵工业2018，Vol.44Issue(1)：44-51,8.DOI:10.13995/j.cnki.11-1802/ts.015531
柠檬酸生产中厌氧消化液的循环回用工艺研究
The novel process of reusing anaerobic digestion effluent in citric acid fermentation
张宏建 1苏先峰 1张建华 1毛忠贵1
作者信息
- 1. 江南大学生物工程学院,工业生物技术教育部重点实验室,江苏无锡,214122
- 折叠
摘要
Abstract
A novel process of reusing anaerobic digestion effluent in citric acid fermentation was developed to resolve waste water pollution in the citric acid industry.Studies showed that direct application of the anaerobic digestion effluent had no effect on liquefaction of the raw materials,but had inhibition effect towards citric acid fermentation.Further studies proved that ammonia-nitrogen,Na +,K + from the anaerobic digestion effluent can inhibit citric acid production and its corresponding critical inhibition concentration were 100,200,and 300 mg/L respectively.In this paper,a combination of ultrafiltration and nano-filtration was adopted for the anaerobic digestion effluent treatment.The inhibitors were effectively purified,with efficiency as high as 90％ for Na +,K + removal and 80％ for ammonianitrogen removal.Application of the treated anaerobic digestion effluent in citric acid fermentation,there was 139.25 ± 1.85 g/L of citric acid,which was comparable to the control,138.70 ± 2.46 g/L.The novel reusing process is feasible and not only reduces wastewater pollution problem and saves fresh water resources,has high economic,environmental and social benefit.关键词
柠檬酸/厌氧消化液/纳滤/氨氮/钠离子/水回用Key words
citric acid/anaerobic digestion effluent/nanofiltration/ammonium-nitrogen/Na +/water reuse引用本文复制引用
张宏建,苏先峰,张建华,毛忠贵..柠檬酸生产中厌氧消化液的循环回用工艺研究[J].食品与发酵工业,2018,44(1):44-51,8.
