| 王辉玥,王翠翠,马玎娜,卢海凤,李保明,王朝元.寒区微藻-生物炭耦合体系处理猪粪沼液[J].农业环境科学学报,2026,45(5):1304-1316. |
| 寒区微藻-生物炭耦合体系处理猪粪沼液 |
| Microalgae-biochar coupled system for swine manure biogas slurry treatment in cold regions |
| 投稿时间：2025-06-11 |
| DOI：10.11654/jaes.2025-0542 |
| 中文关键词: 低温微藻 Chlamydomonas 生物炭 猪粪沼液 氨氮 总磷 |
| 英文关键词: low-temperature microalgae Chlamydomonas biochar pig manure biogas slurry ammonium nitrogen total phosphorus |
| 基金项目:国家自然科学基金区域创新发展联合基金项目（U21A20162）；中国农业大学2115人才培育发展支持计划项目 |
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| 中文摘要: |
| 针对在寒区低温条件下利用微藻处理沼液存在处理效率低的问题，本研究以前期筛选的低温Chlamydomonas为试验藻种，采用不同原料制备的水热炭与热解炭作为吸附剂，以猪粪厌氧发酵沼液为供试废水，探究微藻-生物炭耦合体系在15℃的低温条件下强化沼液中污染物的处理效果。结果表明：Chlamydomonas和生物炭分别单独处理猪粪沼液的最适工艺条件为沼液稀释比1.25%(对应50 mg·L-1 NH4+-N)，热解炭与水热炭投加量分别为5 g·L-1与2 g·L-1。Chlamydomonas的初始接种量为80mg·L-1时，4 d后Chlamydomonas-生物炭耦合体系可显著提高污染物去除率。其中，热解炭有利于去除NH4+-N，在Chlamydomonas-热解炭耦合体系中，其去除率为51.76%~79.57%，比Chlamydomonas处理组和热解炭处理组分别高180.45%~331.19%(P<0.001)和268.58%~608.28%(P<0.001)。水热炭有利于去除总磷(TP)，在Chlamydomonas-秸秆水热炭耦合体系中，TP去除率最高达76.19%，比Chlamydomonas处理组高41.33%，比单独水热炭处理组(-52.58%~13.26%)高244.90%~474.59%。此外，生物炭可显著提升微藻光合色素含量及低温胁迫抗性。研究表明，微藻-生物炭耦合体系可协同强化低温条件下沼液污染物去除及系统稳定性。 |
| 英文摘要: |
| To address the issue of low treatment efficiency when using microalgae to treat anaerobic digestate in cold regions, this study uses the low-temperature Chlamydomonas strain previously screened as the test algae species. Hydrochar and pyrochar, prepared from various raw materials, were used as adsorbents, with pig manure anaerobic fermentation digestate as the test wastewater. The microalgaebiochar coupling system was investigated for its enhanced treatment effect on pollutants in digestate at 15 ℃. The results showed that the optimal process conditions for Chlamydomonas and biochar alone in treating pig manure digestate were: a digestate dilution of 1.25% (corresponding to 50 mg·L-1 NH + 4-N), with pyrochar and hydrothermal biochar added at 5 g·L-1 and 2 g·L-1, respectively. When the initial inoculation of Chlamydomonas was 80 mg·L-1, the microalgae-biochar coupling system significantly enhanced the pollutant removal rate after 4 days. Pyrochar was effective in removing NH4+-N, with removal rates ranging from 51.76% to 79.57% in the Chlamydomonas-pyrochar coupling system, which was 180.45%-331.19% and 268.58%-608.28% higher than those of the Chlamydomonas-only treatment and the pyrochar-only treatment, respectively. Hydrothermal biochar, on the other hand, was effective in removing total phosphorus(TP), with the highest TP removal rate reaching 76.19% in the Chlamydomonas-straw hydrothermal biochar coupling system, which was 41.33% higher than the Chlamydomonas-only treatment and 244.90% to 474.59% higher than the independent hydrothermal biochar treatment (-52.58% to 13.26%). In addition, biochar significantly increased the microalgae's photosynthetic pigment content and resistance to low-temperature stress. This study demonstrates that the microalgae-biochar coupling system can synergistically enhance pollutant removal and system stability under low-temperature conditions. |
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