颜成2,
王电站1,
汪文强1,
邬振江2,
梁剑茹1,
周立祥1
1.南京农业大学资源与环境科学学院，南京 210095
2.南京贝克特环保科技有限公司，南京 211505
基金项目: 国家自然科学基金资助项目（21637003）
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
YE Tao1,,YAN Cheng2,
WANG Dianzhan1,
WANG Wenqiang1,
WU Zhenjiang2,
LIANG Jianru1,
ZHOU Lixiang1
1.College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
2.Nanjing Bact Environmental Solutions Co.Ltd., Nanjing 211505,China
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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。
关键词: 猪场废水/
生物聚沉氧化/
深度脱水/
水质净化
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.
Key words:swine wastewater/
bio-coagulation dewatering and bio-oxidation/
advanced dewatering/
wastewater purification.
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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
叶韬1,,颜成2,
王电站1,
汪文强1,
邬振江2,
梁剑茹1,
周立祥1
1.南京农业大学资源与环境科学学院，南京 210095
2.南京贝克特环保科技有限公司，南京 211505
基金项目: 国家自然科学基金资助项目（21637003）
关键词: 猪场废水/
生物聚沉氧化/
深度脱水/
水质净化
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。
English Abstract
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
YE Tao1,,YAN Cheng2,
WANG Dianzhan1,
WANG Wenqiang1,
WU Zhenjiang2,
LIANG Jianru1,
ZHOU Lixiang1
1.College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
2.Nanjing Bact Environmental Solutions Co.Ltd., Nanjing 211505,China
Keywords: swine wastewater/
bio-coagulation dewatering and bio-oxidation/
advanced dewatering/
wastewater purification
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.
