上流式厌氧污泥床反应器处理凉果废水性能研究
2017-07-10史亮陈师楚何凌峰张永利
史亮 陈师楚 何凌峰 张永利



摘 要:采用上流式厌氧污泥床反应器(UASB)法处理凉果废水,考察废水厌氧处理过程中COD、浊度、脱色率、pH、电导率、悬浮物去除率的变化规律。结果表明:随着厌氧时间的增加,UASB反应器对废水的处理效果不断提高。在最适宜的厌氧时间条件下,废水的COD去除率达62.0%、浊度去除率达41.1%、吸光度及脱色率分别为0.498及48.4%、pH为5.4、悬浮物去除率达30.3%。故,UASB法可作为凉果废水的预处理方式,以降低后续废水的好氧处理难度。
关 键 词: 上流式厌氧污泥床反应器法;凉果废水;COD去除率;浊度去除率;脱色率
中图分类号: X 703 文献标识码: 文章编号: 1671-0460(2017)07-1303-04
Study on Performance of Upflow Anaerobic Sludge Bed Reactor for Treating Preserved Fruit Wastewater
SHI Liang1,CHEN Shi-chu 1,HE Ling-feng2,ZHANG Yong-li2
(1. Foshan Sikete Environmental Protection Engineering Co., Ltd., Guangdong Foshan 528000, China;
2. School of Environmental and Chemical Engineering, Foshan University, Guangdong Foshan 528000, China)
Abstract: The preserved fruit wastewater was treated with the upflow anaerobic sludge bed (UASB) reactor, the change rule of COD, turbidity, decoloring rate, pH, conductivity, suspended solids removal rate in wastewater anaerobic treatment process was researched. The results showed that, with the increase of anaerobic time, the treatment effect of wastewater over the UASB reactor increased. Under the most suitable condition of anaerobic time, the COD removal rate of wastewater was 62%, turbidity removal rate was 41.1%, absorbance and decoloring rate were 0.498 and 48.4%, pH=5.4, and suspended solids removal rate was 30.3%. Therefore, the UASB method can be used as a pretreatment way for preserved fruit wastewater, in order to reduce the difficulty of subsequent aerobic wastewater treatment.
Key words: Upflow anaerobic sludge bed; Preserved fruit wastewater; COD removal rate; Turbidity removal rate; Decoloring rate
加工果品行業的重要方向是加工凉果。早在19世纪50年代,我国的果品产量就达到了相当的数量,其数值为679万t。蜜饯生产在我国已有很悠久的历史,发展至今已成为一种深受人们特别是儿童喜爱的食品[1]。随着加工技术的不断进步与人民生活水平提高,我国的蜜饯产量愈来愈高,逐渐形成了口感不同的“北蜜”和“南蜜”两大派系。两者虽在口味与处理技术上存在差异,但在处理工程中排放的废水等物质都对环境造成了污染[2,3]。生产蜜饯和果脯产生的废水常常有刺激性气味,其排入水体污染环境;同时,污水渗入农田,加剧了农田的盐碱化,导致粮食减产。随着网络购物的兴起,人们对蜜饯的需求量逐年递增,随之而来的废水排放逐渐增加,加速了环境恶化,蜜饯废水的治理问题急需得到改善[4]。处理废水方法多样:生物、化学、物理法[5]。……
