ABR-CSTR组合工艺处理黄酒废水效能研究

发布时间：2018-07-03 01:03

本文选题：ABR-CSTR组合工艺 + 黄酒废水　；参考：《苏州科技学院》2015年硕士论文

【摘要】：随着我国黄酒行业的迅猛发展,黄酒生产废水所带来的环境问题日渐显著。黄酒废水富含淀粉、糖类和蛋白质等有机物,属于高浓度有机废水。厌氧生物处理技术以其消耗少、效率高、成本低、反应条件温和以及无二次污染等显著特点,成为处理高浓度有机废水的首要选择。厌氧折流板反应器(ABR)是以分阶段多相厌氧反应器为理论基础的高效厌氧反应器,具有结构简单,截留污泥能力强,稳定性高等诸多优点。本文通过组合ABR和CSTR反应器形成厌氧-好氧工艺,研究了该组合工艺对黄酒废水的处理效能。本文主要考察了ABR-CSTR组合工艺在启动阶段和稳定阶段的运行特性,考察了容积负荷对系统处理效能的影响,水力停留时间、混合液回流比等因素对系统实现脱氮除磷的优化以及系统的产气特性。主要研究结果如下:(1)ABR-CSTR组合工艺历经100天成功启动。污泥性能良好,并出现生物相的分离。系统出水COD平均浓度在80mg/L以下,COD去除率保持在95%~98%之间。此外,出水NH4+-N、TN和TP的平均浓度分别为0.6、20.4和0.9mg/L,平均去除率分别为99%、56%和83%。(2)随着容积负荷由4kgCOD/(m3·d)增加到8kgCOD/(m3·d),ABR出水COD浓度逐渐上升,去除率由93%降低到81%。CSTR进水负荷相应提高,系统COD去除率依然保持在95%以上。容积负荷的改变,对系统内部造成了一定影响,但整个工艺对负荷的冲击具有很好的缓冲作用,后续CSTR好氧段是保证系统出水稳定的关键。(3)ABR厌氧段对黄酒废水具有良好的厌氧消化作用,在容积负荷分别为4kgCOD/(m3·d),6kgCOD/(m3·d)和8kgCOD/(m3·d)条件下,ABR前三隔室的沼气产量分别为1.58、2.48和2.88m3/(m3·d)。在容积负荷为6kgCOD/(m3·d)时,系统平均产气速率达到最高,各隔室产气速率分别为0.221、0.337和0.433m3/(kgCOD)。(4)ABR-CSTR组合工艺处理黄酒废水的最优运行条件是容积负荷为6kgCOD/(m3·d),HRT为32h,R为150%,SRT为15d,DO为2mg/L。在此运行条件下,系统对黄酒废水具有稳定、高效的去碳脱氮除磷效果。此运行条件下系统出水COD、NH4+-N、TN和TP的平均浓度分别为82.9、1.4、12.8和1.1mg/L,平均去除率分别为98%、97%、75%和81%。
[Abstract]:With the rapid development of rice wine industry in China, the environmental problems caused by rice wine wastewater are becoming more and more obvious. Yellow rice wine wastewater is rich in starch, sugar and protein, and belongs to high concentration organic wastewater. Anaerobic biological treatment technology has become the first choice for the treatment of high concentration organic wastewater due to its characteristics of low consumption, high efficiency, low cost, mild reaction conditions and no secondary pollution. Anaerobic baffle reactor (ABR) is an efficient anaerobic reactor based on the theory of phased multiphase anaerobic reactor. It has many advantages, such as simple structure, strong sludge interception ability and high stability. In this paper, the anaerobic aerobic process was formed by combining ABR and CSTR reactors, and the efficiency of the combined process in treating rice wine wastewater was studied. In this paper, the operation characteristics of ABR-CSTR combination process in start-up and stabilization stages are investigated, and the effect of volumetric load on system treatment efficiency and hydraulic retention time are investigated. Factors such as reflux ratio of mixed liquid optimized the nitrogen and phosphorus removal and the gas production characteristics of the system. The main results are as follows: (1) ABR-CSTR process was successfully started after 100 days. The sludge has good performance and biophase separation. The average COD concentration of effluent was below 80 mg / L and the COD removal rate was between 95% and 98%. In addition, the average concentrations of NH _ 4-NN _ (TN) and TP in effluent were 0.6 mg / L and 0.9 mg / L, respectively, and the average removal rates were 990.56% and 833% respectively. (2) with the volume loading increasing from 4 kg COD / (m 3 d) to 8 kg COD / (m 3 d), the effluent COD concentration increased, and the removal rate decreased from 93% to 81% 路CSTR. The COD removal rate of the system remains above 95%. The change of volumetric load has a certain effect on the system interior, but the whole process has a good buffer effect on the impact of the load. (3) ABR anaerobic stage has a good anaerobic digestion effect on rice wine wastewater, and the biogas production of the first three compartments of ABR is 1.582.48 and 2.88m3/ (m3 d). / m3 d) respectively under the volumetric loading of 4kgCOD / (m3 d) 6kg COD / (m3 d) and 8kg COD / (m3 d), respectively. When the volumetric load was 6 kg COD / (m 3 d), the average gas production rate of the system reached the highest, and the gas production rate of each compartment was 0.221% 0.337 and 0.433m3/ (kgCOD). (4) ABR-CSTR respectively. The optimal operating conditions were as follows: the volumetric load of 6 kg COD / (m3 d) HRT was 32 h / (m 3 d), and the SRT of 15 d DO was 2 mg / L. Under these conditions, the system has a stable and efficient decarbonization, nitrogen and phosphorus removal effect on rice wine wastewater. Under this condition, the average concentrations of COD _ 4 -N _ 4 TN and TP in effluent were 82.9g / L and 1.1mg / L, respectively, and the average removal rates were 98g / L and 81g / L, respectively.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X797

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