【作者】 李靓；

【导师】 俞马宏；

【作者基本信息】 南京理工大学 ， 环境工程， 2010， 硕士

【摘要】 近几年,大蒜制造业蓬勃发展,各种大蒜加工企业规模不断扩大,由此产生了大量的加工废水,但是大蒜废水具有强烈的抑菌作用,因此目前对于这类废水的研究还很少。本文主要研究了ABR-好氧组合工艺对于大蒜水的降解效果,并且考察了添加后续混凝处理对废水COD的去除。本文首先研究了ABR反应器单独处理大蒜加工废水的情况。先以水力停留时间为指标表征了自制ABR反应器,说明增加填料可延长反应器的停留时间,提高其COD的去除率。成功启动了ABR反应器,对于COD为3000mg/L的进水,去除率稳定在75%左右。同时还考察了温度以及进水有机负荷对去除率的影响,确定了本实验ABR反应器的最佳运行工艺,即在35℃下,进水流量为1L／h,进水有机负荷为5000mg/L,此时COD的去除率稳定在80%左右。在ABR反应器的最佳工艺条件下考察ABR-好氧组合工艺对于废水的去除率：ABR反应器对于废水的去除率始终稳定在80%左右,好氧反应器的去除率则始终保持在85%～90%之间,ABR-好氧组合工艺的总去除率始终保持在97%左右,出水水质符合国家二级排放标准。另外实验确定了组合工艺的最适进水COD浓度为5500mg/L,最适温度可达到45℃,而经过ABR处理后的废水再进入好氧反应器处理比相同COD的大蒜水直接进入好氧反应器的COD去除效果提高了8%,可见ABR提高了废水的可生化性。同时,本实验还考察了后续添加混凝处理对于出水COD的去除情况。对比不同混凝剂投加量对于COD去除率的影响,确定了本实验混凝剂的投加量为60mg/L,经过混凝处理,可以将出水的COD降低至60mg/L以下,且出水澄清,透光性好,满足国家一级排放标准。更多还原

【Abstract】 In recent years,because of the expanding of garlic processing enterprises,it produces a lot of wastewater,however the garlic wastwater has characteristics of antiseptic and detoxification, and currently there is few research for this kind of wastewater.This paper studied the effect of ABR-aerobic process on the degradation of garlic wasterwater,and researched the influence of continuerous added coagulation treatment on the removal efficiency of COD in the wasterwater.This article firstly studied the ABR reactor separately treated garlic processing wastewater.Characterized the self-made ABR reactor with HRT,indicating adding the packings will increase the reactor residence,and improve the COD removal rate. Successfully launched the ABR reactor, for the influent of COD 3000mg/L,removal rate maintained about 75%.Meanwhile,the effects of temperature and influent organic loading on the removal rate were studied,the optimal operation process of the ABR reactor was determined which the water flow rate of 1L/h and water organic load of 5000mg/L under the temperature of 35℃,the removal rate of COD stabilized at 80%.Studied the wastewater removal rate of ABR-aerobic process,wastewater removal rate of ABR reactor stabilized at about 80%,the removal rate of aerobic reactor maintained at 85% to 90%,and the total ABR-aerobic process removal rate remained at about 97%,the effluent attained the state’s second-class standard for the environmental quality of surface water. Determined the optimum influent COD is 5500mg/L,while the optimal temperature of ABR-aerobic combined process can reach 45℃.Compared with the same organic load garlic water directly entered the anaerobic reactor,the COD removal of wastewater entered after treatment by ABR reactor enhanced 8%,it can be seen that the wastewater’s biochemical ability can be increased by ABR.As the same time,this experiments also investigated the coagulation process for the effect of COD removal.Comparing the COD removal rate under different dosage and finally determined coagulant dosing quantity of this experiment is 60mg/L,and after coagulation, COD can be reduced to below 60mg/L,the effluent kept clear and attained the state’s first-class standard for the environmental quality of surface water.更多还原