低温UASB处理食品加工废水出水高挥发酸的控制研究

Stuty on controlling Volatile Acid of UASB Effluent in Food Handing Effluent Disposal

试验探讨了低温下降低UASB处理食品加工废水出水挥发酸(VFA)的控制方法,为工程应用提供可靠的参数。试验中分别考察了碱度、微量金属元素、回流比对出水挥发酸的影响。结果表明:碱度的最佳投加量为2530 mg/L;微量金属元素以ZnCl2浓度计投量为3 mg/L时,对颗粒污泥有明显的激活作用;最佳回流比为100%。采用投加碱度、微量金属元素,回流等措施能有效的解决低温厌氧工艺出水VFA高的问题。

n this research , the controlling methods of high volatile acid of enfluent in low temperature period were discussed. The leading content of the experiment was decreasing volatile acid through adding all：alinity and trace metal elements and adopting the way of circturffluenee. The result showed that the best dose of alkalinity was 2530 rag/L; the best dose of trace metal elements was 3 mg/L（ZnC12） ; the best rate of eircumfluence was 100%. Through those methods the ,problem can be sovled.