|
| Removal of Organics in Scattered Piggery Washing Wastewater by Anaerobic Baffled Reactor |
| Received:April 20, 2015 |
| View Full Text View/Add Comment Download reader |
| KeyWord:anaerobic baffled reactor;scattered piggery;washing wastewater;batch operation;dissolved organic matter |
| Author Name | Affiliation | E-mail | | XIAO Yu | School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | SHEN Zhi-qiang | Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | ZHOU Yue-xi | Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | zhouyuexi@263.net | | WU Fu-ping | School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China | |
|
| Hits: 2536 |
| Download times: 2921 |
| Abstract: |
| The present study explored treatment of washing wastewater from scattered and small-scale piggeries by anaerobic baffled reactor (ABR). The operating performances of two influent patterns --sequencing batch(SB) and continuous operation(CO) were compared. The removals of pollutants by SB-ABR in an operation cycle were investigated. The signature organics were detected by three-dimensional fluorescence spectrum and ion chromatography. The removal rates of COD by SB-and CO-ABR were greater than 60%, with CO-ABR higher than SB-ABR. The average COD in the effluent of SB-ABR was 600 mg·L-1 at COD loading rate of 1.40 kg·m-3·d-1, which was greater than that of CO-ABR(350 mg·L-1). The alkalinity of SB-and CO-ABR were more than 1000 mg·L-1. The COD was mainly removed in the first grid of SB-ABR. The organics were reduced quickly during the early period, and reached a steady status after 12 h. In the SB-ABR, there were two fluorescence peaks at λEx/λEm=275 nm/340 nm and λEx/λEm=220 nm/340 nm, which represents protein-like substances, with the peak intensity decreasing along the flow path. The variation trend of the protein-like fluorescence peaks was similar to that of COD. The organics were mainly hydrolyzed within the first 4 h, and small molecular organics, such as formic acid, acetic acid and propionic acid, were mainly produced during this period. |
|
|
|
