School of Environmental and Civil Engineering, Jiangnan University, Jiangsu Province, China.
Water Sci Technol. 2012;65(5):883-9. doi: 10.2166/wst.2012.919.
Increasing textile wastewaters and their biotreatment byproduct-waste activated sludge are serious pollution problems. Butyric acid production from textile wastewater sludge by anaerobic digestion at different C/N ratios was investigated. Adding starch to textile wastewater sludge with a C/N ratio of 30 increased the butyric acid concentration and percentage accounting for total volatile fatty acids (TVFAs) to 21.42 g/L and 81.5%, respectively, as compared with 21.42 g/L and 10.6% of textile wastewater sludge alone. The maximum butyric acid yield (0.45 g/g VS), conversion rate (0.74 g/g VS(digest)) and production rate (2.25 g/L d) was achieved at a C/N ratio of 30. The biological toxicity of textile wastewater sludge also significantly decreased after the anaerobic digestion. The study indicated that the anaerobic co-digestion of textile wastewater sludge and carbohydrate-rich waste with appropriate C/N ratio is possible for butyric acid production.
纺织废水及其生物处理副产物——废活性污泥的增加是严重的污染问题。本研究采用厌氧消化法，在不同 C/N 比下，从纺织废水污泥中生产丁酸。与单独使用纺织废水污泥相比，将 C/N 比为 30 的淀粉添加到纺织废水污泥中，丁酸的浓度和占总挥发性脂肪酸（TVFA）的百分比分别提高到 21.42g/L 和 81.5%。在 C/N 比为 30 时，丁酸的最大产率（0.45g/gVS）、转化率（0.74g/gVS（消化））和产率（2.25g/L·d）最高。纺织废水污泥的生物毒性在厌氧消化后也显著降低。研究表明，对于丁酸的生产，在适当的 C/N 比下，对纺织废水污泥和富含碳水化合物的废物进行厌氧共消化是可行的。
