【作者】 田凯勋；

【导师】 唐受印； 戴友芝；

【作者基本信息】 湘潭大学 ， 环境工程， 2003， 硕士

【摘要】 有机废水预处理中，水解酸化预处理工艺由于其具有成本低、适应性强、管理方便等特点，现已越来越广泛地被应用，但对于此工艺的一些理论和参数还不是很成熟。本课题在国内外已有研究成果的基础上，对水解酸化工艺进行了进一步的研究，旨在为此工艺的应用提供更有效的理论依据和设计参考。 本试验通过对污泥的培养与驯化，并进行了性能测定，得到了合格的污泥，然后分三部分对水解酸化预处理工艺进行了理论和实际废水处理的研究。 首先对水解酸化的影响因素进行了考察。用葡萄糖作唯一的碳源时，得出水解酸化的较适宜工艺条件为pH=6.10～8.02，最佳pH条件为7.0左右，COD_Cr浓度最好控制在5000mg／L以下。在pH=7.01、COD_Cr=3815.3mg／L条件下，其最大酸化率可达到44.6％，最大酸化度可达到64.6％。通过对产酸过程的分析，运用Monod方程模式，得出水解产酸的动力学参数为：V_max=8.42／d，K_s=1256.83mg／L。 水解酸化预处理可明显提高酱油废水的可生化性。当pH=7.0、HRT=4h时，酱油废水的BOD₅／COD_Cr值从0.34提高到0.52，COD_Cr去除率可达15.35％。经水解酸化预处理后，同浓度的酱油废水好氧处理效果明显变好，达到COD_Cr同样去除60％的时间大约要缩短6小时。 对于不易好氧和厌氧生物降解的吡啶废水，水解酸化工艺对其也有明显的降解作用。在pH=6.0、HRT=60h时，对于较低浓度的吡啶废水，废水中的吡啶基本上可以全部水解；浓度为102.7mg／L时吡啶可以降解75.27％；对于没经高浓度驯化的污泥，在吡啶浓度为198.4mg／L时，水解酸化降解率仍可达到55.86％。更多还原

【Abstract】 Based on general survey of the home and foreign study, a further research on anaerobic hydrolysis acidification process for organic wastewater was carried out in order to provide more effective theoretic basis and design advice to its industrial practice.Firstly, with the glucose used as the single energy source, the effects of HRT, pH and OL on anaerobic hydrolysis acidification process were studied. The experimental result showed that the optimum condition are pH=7.0 and the influent concentration of CODcr below 5000 mg/L, and the maximum acidification efficient (AE) and acidification degree (AD) were 44.6% and 64.6% respectively under the optimum condition. The kinetics parameters were Vmax=8.42/d and Ks=1256.83 mg/L.Then, the process was carried out to pretreat the soy sauce wastewater, and the result indicated that it can obviously improve the biodegradability of the wastewater and shorten the residence time of the aerobic process. Under the condition of pH=7.0 and HRT=4h, the BOD5/CODcr ratio of the soy sauce wastewater was improved from 0.34 to 0.52 and it can shorten the HRT 6 hours in the latter aerobic process.Moreover, for the pyridine wastewater, which was hardly degraded by the aerobic and the anaerobic treatment, the process was proved to be a good pretreatment method in this experiment. Under the condition of pH=6.0 and HRT=60h, the pyridine can be degraded completely at influent concentration below 50 mg/L and the percent conversion can reach 75.27% and 55.86% at the influent concentration of 102.7 mg/L and 198.4 mg/L , respectively.更多还原