VABR处理果汁废水效果的影响因素及工程应用研究

发布时间：2018-06-22 00:27

本文选题：VABR反应器 + 果汁废水　；参考：《苏州科技大学》2017年硕士论文

【摘要】：果汁生产废水有机物含量高,伴随果汁加工业的规模扩大,其废水排放已成为一个突出的水体环境污染问题。果汁生产过程中产生的废水,污染物浓度高,水质、水量波动大,为有效去除污染物、降低果汁生产企业废水排放对周边水体环境的污染,进行污水处理试验研究并开展实际工程应用研究。本文基于VABR反应器原理,以实际工程应用为研究背景,通过实验室小试,研究环境因素和操作因素对VABR处理果汁废水效能的影响。开展以VABR为主体的厌氧+好氧联用工艺处理果汁废水研究,并在实际工程中具体应用和验证。主要研究结果如下:1、在中温条件下,VABR处理果汁废水小试结果表明经接种厌氧污泥颗粒的反应装置,处理废水COD浓度最大到21858mg/L,果汁贡献的COD比例达86.3%时,COD去除率达92%以上。2、VABR反应器处理果汁废水试验,考察了容积负荷、水力负荷、出水回流比、进水碱度、进水C:N:P这五个因素对VABR处理果汁废水效果的影响。结果表明,HRT控制在30.0h~50.0h,出水回流比保持在600%左右,进水碱度保持在1300mg/L附近,C:N:P保持在400:5:1左右,可保证VABR对果汁废水最好的处理效果。3、采用SBR工艺对VABR反应器出水进行进一步的好氧处理,可有效提升COD的去除效率。进水COD浓度在300mg/L~1400mg/L,HRT约24h,其出水COD去除效率可达90%。某果汁生产企业废水处理工程,原水水量150m~3/d,进水COD浓度为10000mg/L~20000mg/L,p H值为4~6。采用二级厌氧(VABR)+A/O法工艺处理系统,VABR反应器COD容积负荷为14.3kg COD/(m~3.d),进水碱度大致为1300mg/L,COD:N:P为300:5:1~400:5:1,并投加一定量的微量元素以促进厌氧微生物代谢活性。其VABR出水COD去除率达90%以上,最终出水COD浓度稳定小于100mg/L。
[Abstract]:The wastewater from juice production has a high organic content, and with the expansion of juice processing industry, its wastewater discharge has become an outstanding problem of water environmental pollution. In order to effectively remove the pollutants and reduce the pollution to the surrounding water environment, the wastewater produced in the process of fruit juice production has high pollutant concentration, high water quality and large fluctuation of water quantity. Carry on the sewage treatment experiment research and carry out the practical engineering application research. Based on the principle of VABR reactor and with the background of practical engineering application, the effects of environmental factors and operation factors on the efficiency of VABR treatment of juice wastewater were studied in laboratory. The study on the treatment of juice wastewater by anaerobic aerobic process with VABR as the main body was carried out, and it was applied and verified in practical engineering. The main results are as follows: (1) at moderate temperature, VABR was used to treat fruit juice wastewater. The results showed that the reactor was inoculated with anaerobic sludge granules. The maximum COD concentration of treated wastewater was 21858 mg / L, and the COD ratio of juice was 86.3%. The COD removal rate of juice was more than 92%. The experiment of treating juice wastewater with VABR reactor was carried out. The volumetric load, hydraulic load, effluent reflux ratio and influent alkalinity were investigated. The effect of influent C: n: P on the treatment of juice wastewater by VABR. The results show that the HRT is controlled at 30.0 h / 50.0 h, the effluent reflux ratio is kept at about 600%, and the influent alkalinity is kept at about 1 300 mg / L, C / N: P is about 400: 5: 1, It can ensure the best treatment effect of VABR on juice wastewater. SBR process can be used to further aerobic treatment of VABR reactor effluent, which can effectively improve the removal efficiency of COD. The influent COD concentration is about 24h at 300mg / L 1400mg / L HRT, and the effluent COD removal efficiency can reach 90%. In the wastewater treatment project of a fruit juice production enterprise, the raw water volume is 150 mg / d, and the influent COD concentration is 10 000 mg / L / L ~ (2 000) mg / L ~ (-1) H = 4 ~ 6. The volumetric loading of 14.3kg / (mc3d) and the alkalinity of influent were about 1300mg / L / L COD / N: P = 300: 5: 1 / 400: 5: 1, and a certain amount of trace elements were added to promote the metabolic activity of anaerobic microorganism. The COD removal rate of VABR effluent is more than 90%, and the final effluent COD concentration is less than 100 mg / L.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X792

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