[1]张华生,邵一奇,颜成,等.厌氧消化时间对猪场粪污废水理化性质及其生物沥浸效果的影响[J].南京农业大学学报,2019,42(1):124-129.[doi:10.7685/jnau.201804021]
 ZHANG Huasheng,SHAO Yiqi,YAN Cheng,et al.Effect of anaerobic digestion time on physicochemical properties of swine wastewater and its bioleaching effectiveness[J].Journal of Nanjing Agricultural University,2019,42(1):124-129.[doi:10.7685/jnau.201804021]
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厌氧消化时间对猪场粪污废水理化性质及其生物沥浸效果的影响()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
42卷
期数:
2019年1期
页码:
124-129
栏目:
生物与环境
出版日期:
2019-01-09

文章信息/Info

Title:
Effect of anaerobic digestion time on physicochemical properties of swine wastewater and its bioleaching effectiveness
作者:
张华生1 邵一奇1 颜成2 梁剑茹1 王电站1 周立祥1
1. 南京农业大学资源与环境科学学院, 江苏 南京 210095;
2. 南京贝克特环保科技有限公司, 江苏 南京 211505
Author(s):
ZHANG Huasheng1 SHAO Yiqi1 YAN Cheng2 LIANG Jianru1 WANG Dianzhan1 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
关键词:
厌氧消化猪场粪污废水生物沥浸脱水性能
Keywords:
anaerobic digestionswine wastewaterbioleachingdewaterability
分类号:
X713
DOI:
10.7685/jnau.201804021
摘要:
[目的]本文旨在了解厌氧消化时间对猪场粪污废水性质及其后续生物沥浸(包括pH值和脱水性能)的影响。[方法]研究猪场粪污废水在厌氧消化期间的理化性质变化,包括pH、化学需氧量、氨氮含量和总磷含量,并利用生物沥浸法处理不同厌氧消化时间(0~60 d)的沼液。[结果]厌氧消化会导致粪污废水pH值和总碱度的升高,pH值从起始的6.5升高至7.5,总碱度升高54.6%。有机物和总磷的去除率分别为68.9%和28.6%,但对氨氮含量无明显影响,导致C/N值大幅降低,从15.3降至4.4。猪场粪污废水经厌养消化后,其EPS含量增加。研究发现厌氧消化0~15 d的沼液,其生物沥浸效果较好,体系pH值降至4.5左右,过滤比阻(SRF)降至5×1011m·kg-1以下,脱水性能提高95.1%以上。厌氧消化30~60 d的沼液,其生物沥浸效果变差,pH值维持在6.5~8.0,过滤比阻逐渐升高。[结论]为便于生物沥浸处理,猪场粪污废水可不经厌氧消化,或者厌氧消化时间不宜超过2周。厌氧消化时间过长,体系碱度增加,对酸缓冲性能增强,同时胞外聚合物(EPS)含量也增加,可能是导致粪污废水经较长时间厌氧消化后生物沥浸效果变差的原因。
Abstract:
[Objectives]This paper was aimed to understand the effect of anaerobic digestion time on physicochemical properties of swine wastewater and its bioleaching effectiveness(including pH and dewaterability). [Methods]The changes of swine wastewater characteristics,including pH value,chemical oxygen demand(COD),ammonia nitrogen and total phosphorus,were investigated during anaerobic digestion,and bioleaching was used to treat swine wastewater at different anaerobic digestion time(0-60 d). [Results]Anaerobic digestion of swine wastewater led to the increases of pH from 6.5 to 7.5 and the total alkalinity by 54.6%,respectively. The removal efficiency of CODcr and total phosphorus reached 68.9% and 28.6%,respectively. But there was no significant change in ammonia nitrogen of swine wastewater during anaerobic digestion. As a result,C/N ratio of digested swine wastewater sharply declined from initial 15.3 to final 4.4. The content of extracellular polymeric substances(EPS) of swine wastewater increased after anaerobic digestion. When swine wastewater was anaerobically digested for 15 days,bioleaching of the digested swine wastewater resulted in both the drop of its pH to 4.5 and the reduction of its specific resistance to filtration(SRF) to 5×1011 m·kg-1. Such low value of SRF indicated that the dewaterability of swine wastewater increased by 95.1% after bioleaching treatment. However,swine wastewater treated with long anaerobic digestion time(30-60 d) had poor bioleaching effectiveness,exhibiting that pH value maintained at around 6.5-8.0 and SRF increased after bioleaching. [Conclusions]For obtaining better bioleaching effectiveness,the anaerobic digestion time of swine wastewater should not exceed 2 weeks. Strong acid buffering capacity and increased EPS content of the swine wastewater with long anaerobic digestion time may be responsible for its poorer bioleaching effectiveness.

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备注/Memo

备注/Memo:
收稿日期:2018-04-12。
基金项目:国家自然科学基金项目(21637003)
作者简介:张华生,硕士研究生。
通信作者:周立祥,教授,主要从事固体废物处理与处置,E-mail:lxzhou@njau.edu.cn。
更新日期/Last Update: 1900-01-01