光合细菌强化高浓度酵母废水厌氧生物处理效果研究  

Photosynthetic bacteria enhancing anaerobic biological treatment effect of high concentrated yeast wastewater

作　　者：李友明[1] 薛宇慧 葛广德 胡永玫 侯轶[1] Li Youming;Xue Yuhui;Ge Guangde;Hu Yongmei;Hou Yi(State Key Laboratory of Pulp and Paper,South China University of Technology,Guangzhou 510640,China;Guangxi Zhuang Autonomous Region Metallurgical Products Quality Inspection Station,Nanning 530023,China)

机构地区：[1]华南理工大学制浆造纸国家重点实验室,广州510640 [2]广西壮族自治区冶金产品质量检验站,南宁530023

出　　处：《农业工程学报》2019年第9期214-220,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：广东省科技计划攻关项目(2015A020215009)

摘　　要：高浓酵母废水的厌氧生物处理效率对废水处理系统的运行成本和经济可行性具有至关重要的作用。该文采用光合细菌强化厌氧污泥的方法处理酵母废水,考察了废水在厌氧处理前后的化学需氧量、色度变化以及光合细菌加入前后微生物的OTU分布、厌氧污泥细菌的物种门类、污泥古菌聚类结果序列数量的变化。结果表明:光合细菌加入后,单段厌氧反应器处理酵母废水化学需氧量和色度去除率分别由原来的58.20%、47.50%显著提升至 75.12%和62.04%,光合细菌强化厌氧生物处理过程效果明显。微生物多样性分析发现在厌氧污泥驯化和添加光合细菌强化过程中,优势菌种不断累积,特异性增强,物种门类数目减少。光合细菌与其他异养细菌存在共生关系,加入光合细菌后污泥中产甲烷优势群落微生物明显增多,从而提高厌氧系统的处理效果。研究结果为高浓工业有机废水的有效处理提供了参考。Yeast industry provides enormous economic and social benefits for the sugarcane biomass industry. However, yeast industrial wastewater is characterized by high concentration of chemical oxygen demand (CODcr), high chromaticity, high concentration of sulfate and difficult biodegradation, which leads to many issues of the environment. The treatment process of wastewater has the problem that discharge water is difficult to reach the standard and its cost is too high, which has become a bottleneck restricting the development of domestic yeast enterprises. Biotechnology is currently widely used, but the results are still not up to standard. Therefore, biological treatment should be supplemented by other methods for in-depth treatment. In this paper, yeast wastewater was treated by adding photosynthetic bacteria to strengthen anaerobic sludge. The ultrafiltration membrane was used to filter the separated dialysate wastewater as the test object. A small UASB anaerobic reactor was designed. The initial MLSS (mixed liquid sludge concentration) value of the inoculated sludge in the reactor was 4 820 mg/L, and the reactor temperature was kept at 32 ℃. The hydraulic retention time was 48 h, and the influent pH value was controlled between 6.8 and 7.0. At the start-up stage of the anaerobic reactor, glucose, ammonium nitrate and potassium dihydrogen phosphate were used as C, N and P source, respectively, and an appropriate amount of trace elements were added to prepare a nutrient solution with a ratio of 300:5:1 of C:N:P. Yeast wastewater and nutrient solution were mixed and configured into water samples with mass concentration gradient of 3 000-3 500, 7 000-7 500, 10 000-10 500 and 14 000-15 000 mg/L, respectively. The water samples were added to the reactor in a gradient form from low concentration to high concentration, and the batch test was carried out until the organic concentration of wastewater reached the concentration of raw water. After the treatment effect of the reactor was stabilized, the photosynthetic bacter

关 键 词：废水 废水处理 光合细菌 厌氧处理工艺 微生物多样性 

分 类 号：X703.1[环境科学与工程—环境工程]