规模化猪场粪污废水生物聚沉氧化新工艺及其生产性实验效果研究
A case study on effectiveness of a novel treatment process for purifying swine wastewater from large-scale piggery by using bio-coagulation dewatering followed by bio-oxidation
-
摘要: 针对我国猪场粪污废水现行厌氧-好氧活性污泥法处理模式达标难度大、运行成本高的问题,研发出生物聚沉氧化新工艺(bio-coagulation dewatering followed by bio-oxidation, BDBO)。在广东惠州某5万头猪场构筑了采用该工艺的实际工程,通过现场采样,详细分析新工艺各个单元的污染物,包括化学需氧量(COD)、氨氮、总氮(TN)和总磷(TP)的变化情况,研究了新工艺对猪场粪污废水的处理效果及机制。结果表明,在水力停留时间(HRT)仅为2.5 d的新工艺系统中,猪场粪污原水(进水)的COD、氨氮和TP分别为(11 697±1 484)、(837±25)、(532±97)mg·L-1,处理出水水质分别为(273±58)、(44±9)、(4.5±1.0)mg·L-1,总去除率分别达到了97.7%、94.7%、99.2%,出水远优于广东省地方畜禽养殖业污染物排放标准(DB 44/613-2009)。运行成本大约6元·t-1,比原常规处理系统(采用生化处理+物化处理组合工艺)出水水质更好,成本约为原处理系统的1/2~1/3,并同步解决了污泥的深度脱水问题。研究发现新工艺可相对快速处理达标并且成本相对较低,其机制在于废水进入常规生化系统(A2/O)之前,高效去除了悬浮颗粒物(SS),使得以SS形式存在的COD、P和部分N被大幅度削减。新工艺解决了目前猪场废水处理时间长、难达标(尤其是氨氮)、运行成本高的难题。Abstract: In view of difficulty and high cost of conventional anaerobic-aerobic activated sludge technique to successfully treat swine wastewater for meeting effluent discharge standard, a novel approach called as bio-coagulation dewatering followed by bio-oxidation (BDBO) is developed. BDBO technique was applied in a piggery with 50 000 pigs located in Huizhou city, Guangdong province. The water quality indexes (COD, NH3-N, TN and TP) of the effluent at different treatment stages in this project were investigated and determined for successive 4 months. The results showed that, in this BDBO process with only 2.5 d hydraulic retention time (HRT), the concentration of COD, NH3-N, and TP of final effluent were decreased to (273±58), (44±9) and (4.5±1.0) mg·L-1 from initial (11 697±1 484), (837±25) and (532±97) mg·L-1 in influent with removal efficiencies of 97.7%, 94.7% and 99.2%, respectively. Obviously, the effluent quality was much superior to the relative discharge standard by Guangdong province (DB 44/613-2009). Moreover, its operating cost was only about 6 yuan·t-1, which was about 1/2 to 1/3 of the costs with conventional anaerobic-aerobic activated sludge system. In addition, BDBO process also improved efficiently advanced dewatering of sewage sludge. The above-mentioned merits exhibited by BDBO process were found to be mainly attributed to absolutely removal of SS prior to A2/O stages. As a result, most of COD, P and partial N in the form of SS in the influent could be greatly reduced before the influent was treated with anaerobic-aerobic activated sludge technique. This already-pretreated influent only containing soluble COD, N and P due to completely removing SS was much easier for water purification through consequent A2/O processes. The novel BDBO process is of a great application prospect in the field of animal wastewater treatment because of a short HRT, meeting easily discharged standard (especially for NH3-N), and efficient operating cost.
-
[1] 韩巍. 规模化养猪场废水处理的试验研究[D].海口:华南热带农业大学,2006 [2] ZHAO B, LI J, LEU S Y.An innovative wood-chip-framework soil infiltrator for treating anaerobic digested swine wastewater and analysis of the microbial community[J].Bioresource Technology,2014,173:384-391 10.1016/j.biortech.2014.09.135 [3] 曾凤, 霍守亮, 席北斗,等. 猪场废水厌氧消化液后处理过程中DOM变化特征[J]. 环境科学,2011,32(6):1687-1695 [4] 王欢,李旭东,曾抗美. 猪场废水厌氧氨氧化脱氮的短程硝化反硝化预处理研究[J]. 环境科学,2009,30(1):114-119 [5] WEI X M, LIN C, DUAN N, et al.Application of aerobic biological filter for treating swine farms wastewater[J].Procedia Environmental Sciences,2010,2(1):1569-1584 10.1016/j.proenv.2010.10.169 [6] BORTONE G.Integrated anaerobic/aerobic biological treatment for intensive swine production.[J].Bioresource Technology,2009,100(22):5424-5430 10.1016/j.biortech.2008.12.005 [7] 广东省环境保护局, 广东省质量技术监督局.畜禽养殖业污染物排放标准:DB 44/613-2009[S].北京:中国标准出版社,2009 [8] 汪文强. 规模化猪场粪污废水常规生化/物化组合处理工艺的效果及存在问题[D]. 南京:南京农业大学,2018 [9] 周立祥. 一种快速处理奶牛场粪污废水的方法:ZL201510859704.9[P]. 2018-05-25 [10] 覃孔昌,颜成,王电站,等. 生物聚沉氧化法快速处理奶牛场粪污废水的研究[J]. 南京农业大学学报, 2017,40(6):1058-1064 [11] 马秋莹, 刘旭林, 封莉,等. 同步化学除磷对A2/O工艺除污染效能与活性污泥性能的影响[J]. 环境工程学报,2017,11(11):5848-5855 10.12030/j.cjee.201608143 [12] 周立祥. 污泥生物沥浸处理技术及其工程应用[J]. 南京农业大学学报,2012,35(5):154-166 [13] 侯庆杰, 王振宇, 梁剑茹,等. 预酸化下营养剂添加量对生物沥浸处理洗毛废水的影响[J]. 环境工程学报,2015,9(3):1079-1085 [14] 国家环境保护总局. 水和废水监测分析方法[M]. 4版. 北京:中国环境科学出版社,2002 [15] 杨宏, 姚仁达.pH和硝化细菌浓度对氨氮氧化速率的影响[J]. 环境工程学报,2017,11(5):2660-2665 10.12030/j.cjee.201512155 [16] 王淑莹,李论,李凌云,等. 快速启动短程硝化过程起始pH值对亚硝酸盐积累的影响[J]. 北京工业大学学报,2011,37(7):1067-1072 [17] 韩伟铖,颜成,周立祥. 规模化猪场废水常规生化处理的效果及原因剖析[J]. 农业环境科学学报,2017,36(5):989-995 [18] 赵雅光, 蔡利芳, 万俊锋,等. 组合工艺处理猪场废水中试实验研究[J]. 环境工程学报,2016,10(4):1665-1673 [19] 孟海玲,董红敏,黄宏坤. 膜生物反应器用于猪场污水深度处理试验[J]. 农业环境科学学报,2007,10(4):1277-1281 [20] 张思, 宁国辉, 杨铮铮,等. 复合填料土壤渗滤系统处理农村生活污水的效果[J]. 环境工程学报,2014,8(11):4625-4630 [21] 陈永志, 彭永臻, 王建华,等.A2/O-曝气生物滤池工艺处理低C/N比生活污水脱氮除磷[J]. 环境科学学报,2010,30(10):1957-1963 [22] 王建文.SBR工艺中同步硝化反硝化影响因素及动力学模型研究[D].西安:长安大学,2013 [23] 张自杰. 排水工程:下册[M]. 北京:中国建筑工业出版社,2015 [24] CELEN I, BUCHANAN J R, BURNS R T, et al.Using a chemical equilibrium model to predict amendments required to precipitate phosphorus as struvite in liquid swine manure[J].Water Research,2007,41(8):1689-1696 10.1016/j.watres.2007.01.018
计量
- 文章访问数: 2373
- HTML全文浏览数: 2229
- PDF下载数: 328
- 施引文献: 0