【作者】 齐志鑫；

【导师】 任南琪；

【作者基本信息】 哈尔滨工业大学 ， 环境科学与工程， 2010， 硕士

【摘要】 印染废水具有水质复杂、pH高、可生化性差等特点,采用单一的好氧生物处理难以使出水达标排放,因此本研究采用中试规模的复合型厌氧折流板反应器(ABR)处理印染废水,通过厌氧微生物的水解酸化作用将印染废水中的复杂有机物降解为易于好氧微生物利用的简单有机物。本研究确定了复合型ABR稳定运行的工艺参数,从而为绍兴水处理发展有限公司一期工程厌氧段挖潜改造工程的设计和运行提供了决策依据和参考。本研究考察了复合型ABR的启动及其运行效能,中试结果表明,复合型ABR在HRT为60 h,pH为7.0~8.5,水力负荷为9.3 m~3/(m~2·d),容积负荷为0.4 kgCOD/(m~3·d)的条件下启动。复合型ABR将印染废水中的84种有机物削减为44种,并有效去除了某些类型的染料;在进水COD范围为700~1300 mg/L,HRT为12 h,pH在7.0~9.0波动时,水解酸化效果较明显,COD去除率平均为28.6 %,废水的平均B/C由0.27提高至0.35;当pH在6.5~7.2波动时,产甲烷作用增强,COD平均去除率达到40.0 %。SS的平均去除率为40.8 %。复合型ABR出水经好氧处理后,COD变化范围为104~142 mg/L,平均值为124 mg/L,经少量硫酸铝试剂混凝处理后可达标排放。复合型ABR降低了废水的污染程度,提高了废水的可生化性,减小了废水的pH变化范围,从而为后续好氧段的稳定运行提供了有利条件。广义灰色关联分析结果表明,表面水力负荷、容积负荷、水温和进水SS对复合型ABR的COD去除效果影响较大。依据复合型ABR的运行效能和广义灰色关联法的分析结果,确定了复合型ABR稳定运行的工艺参数:HRT控制在12 h;pH范围为7.0~9.0;碱度保持在600~1400 mg/L;ORP保持在-450~-550 mV;表面水力负荷为40~48 m~3/(m~2·d);容积负荷为1.3~2.5 kgCOD/(m~3·d)。通过分析复合型ABR的COD去除率的影响因素,认为复合型ABR的表面水力负荷的最大提升幅度不宜超过每天3 m~3/(m~2·d);可以不调节复合型ABR内的温度,但应尽可能采取适当的保温措施;应当对ABR的各隔室底部及时适量排泥。更多还原

【Abstract】 Dye wastewater is characterized by complex quality, high pH, low biodegradability and so on, which is difficult to be discharged under standard by single aerobic biological treatment. Therefore, this study used a pilot-scale compound anaerobic baffled reactor (ABR) to treat dye wastewater, which utilized the hydrolyzation and acidification of the anaerobic microbes to degrade the complex organic matter in dye wastewater to simple one which could be easily used by aerobic microbes. This study identified technical parameters for steady operation of the modified anaerobic baffled reactor, and thus supplied basis and reference for decision making for the design and operation of the anaerobic part revamp engineering of the First Period Engineering in Shaoxing Water Treatment and Development Ltd.This study investigated the startup and operation performance of the modified anaerobic baffled reactor. The pilot-scale trial results showed that the reactor were successfully started up under the condition that influent COD range was 700~1 300 mg/L, HRT was 60 h, pH 7.0~8.5, hydraulic load range 9.3 m~3/(m~2·d) and volume load 0.4 kgCOD/(m~3·d). The modified anaerobic baffled reactor reduced the organic matter type number from 84 to 44, effectively removed some types of dye; when pH fluctuated between 7.0 and 9.0, the effect of hydrolyzation and acidification was evident, the average COD removal efficiency was 28.6 % and the ratio of BOD to COD from 0.27 to 0.35; when pH fluctuated between 6.5 and 7.2, the effect of methanogenesis was intensified, and the average COD removal efficiency reached 40.0 %. The average SS removal efficiency was 40.8 %.After the effluent of the compound ABR was treated by aerobic process, the COD variation range was 104~142 mg/L, the average of which was 124 mg/L. The effluent could be discharged under standard after cogulation treatment by a small amount of aluminium sulfate. The compound ABR reduced the pollution degree of dye wastewater, improved its biodegradability, decreased its pH variation range, and thus supplied favorable conditions for the steady operation of the latter aerobic part.The results of generalized grey relational analysis showed that hydraulic load, volume load, water temperature and influent SS greatly influenced COD removal efficiency. Based on the operational performance of the modified anaerobic baffled reactor and the results of generalized grey relational analysis maintained in a certain range: technical parameters for steady operation of the reactor were identified: HRT 12 h; pH range 7.0~9.0; alkalinity range 600~1400 mg/L; ORP range -450~-550 mV; hydraulic load range range 40~48 m~3/(m~2·d), volume load range 1.3~2.5 kgCOD/(m~3·d).Based on comprehensive analysis on the influencing factors of COD removal efficiency of the reactor, it is suggested that the maximum elevation of hydraulic load of the reactor should not be higher than 3 m~3/(m~2·d) per day; there is no need to regulate the reactor temperature, but it is better to take some insulation measures; it is necessary to discharge a proper amount of sludge at the bottom of each compartment in time.更多还原