The toxicity of high-chlorinated polychlorinated biphenyls (PCBs) can be efficiently reduced through anaerobic dechlorination. However, this approach suffers a lot in face of in situ microbial remediations, like a shortage of biomass. In this study, we showed that the amendment of organic matters could help microbiota in paddy soil with anaerobic dechlorination and greatly shortened the lag period. The presence of organic matters offered a better environment for dechlorinating bacteria. They provided not only a more strictly anaerobic milieu but also copious carbon sources. By using high-throughput 16S rRNA gene sequencing, genera Dehalobacter, Dehalobacterium, and Desulfitobacterium capable of dechlorination were identified in enriched cultures. Taken together, this study proved that extra organic matters can promote anaerobic dechlorination in paddy soil slurry microcosm systems, which provides new insights into the bioremediation of PCB-contaminated soils.

通过厌氧脱氯可以有效降低高氯代多氯联苯（PCBs）的毒性。然而，这种方法在原位微生物修复方面遭受了很多损失，例如生物质短缺。在本研究中，我们发现有机质的改良可以帮助稻田土壤中的微生物群进行厌氧脱氯，并大大缩短滞后期。有机物的存在为脱氯细菌提供了更好的环境。它们不仅提供了更严格的厌氧环境，还提供了丰富的碳源。通过使用高通量 16S rRNA 基因测序，发现 Dehalobacter、Dehalobacterium和Desulfitobacterium属在富集培养物中鉴定出能够脱氯。综上所述，本研究证明了额外的有机物可以促进稻田泥浆微观系统的厌氧脱氯，这为多氯联苯污染土壤的生物修复提供了新的见解。