Anaerobic fermentation combined with low-temperature thermal pretreatment for phosphorus-accumulating granular sludge: Release of carbon source and phosphorus as well as hydrogen production potential.
Anaerobic fermentation combined with low-temperature thermal pretreatment for phosphorus-accumulating granular sludge: Release of carbon source and phosphorus as well as hydrogen production potential.
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DOI：
10.1016/j.biortech.2016.06.060
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发表时间：
2016-10
影响因子：
11.4
通讯作者：
Jinte Zou;Yongmei Li
中科院分区：
文献类型：
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作者：
Jinte Zou;Yongmei Li
研究了聚磷颗粒污泥（PGS）和聚磷絮凝污泥（PFS）在低温热预处理和厌氧发酵过程中有机物和磷的释放规律。同时，对沼气生产潜力和微生物群落结构进行了探索。结果表明，低温热预处理后，PGS中胞外聚合物（EPS）含量高，磷在EPS中的保留率高，使PGS释放出的可溶性化学需氧量（SCOD）和磷含量明显高于PFS。此外，PGS含有更多的厌氧菌和死细胞，导致发酵过程中PGS比PFS释放更高的SCOD和挥发性脂肪酸。PGS发酵促进了正丁酸的产生，并且由于产氢细菌的存在，PGS在发酵过程中表现出产氢潜力。因此，厌氧发酵与低温热预处理相结合可以促进碳和磷的回收以及从PGS中产生氢气。
Releases of organic compounds and phosphorus from phosphorus-accumulating granular sludge (PGS) and phosphorus-accumulating flocculent sludge (PFS) during low-temperature thermal pretreatment and anaerobic fermentation were investigated. Meanwhile, biogas production potential and microbial community structures were explored. The results indicate that much more soluble chemical oxygen demand (SCOD) and phosphorus were released from PGS than from PFS via low-temperature thermal pretreatment because of the higher extracellular polymeric substances (EPS) content in PGS and higher ratio of phosphorus reserved in EPS. Furthermore, PGS contains more anaerobes and dead cells, resulting in much higher SCOD and volatile fatty acids release from PGS than those from PFS during fermentation. PGS fermentation facilitated the n-butyric acid production, and PGS exhibited the hydrogen production potential during fermentation due to the presence of hydrogen-producing bacteria. Therefore, anaerobic fermentation combined with low-temperature thermal pretreatment can facilitate the recovery of carbon and phosphorus as well as producing hydrogen from PGS.