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Effect of aqueous phase from hydrothermal carbonization of sewage sludge on heavy metals and heavy metal resistance genes during chicken manure composting
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-04-23 , DOI: 10.1016/j.jhazmat.2024.134398
Guangchun Shan 1 , Xiaoshu Wei 2 , Weiguang Li 3 , Jie Liu 3 , Shanshan Bao 4 , Shuncai Wang 3 , Lin Zhu 3 , Beidou Xi 2 , Wenbing Tan 2
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-04-23 , DOI: 10.1016/j.jhazmat.2024.134398
Guangchun Shan 1 , Xiaoshu Wei 2 , Weiguang Li 3 , Jie Liu 3 , Shanshan Bao 4 , Shuncai Wang 3 , Lin Zhu 3 , Beidou Xi 2 , Wenbing Tan 2
Affiliation
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Livestock manure is often contaminated with heavy metals (HMs) and HM resistance genes (HMRGs), which pollute the environment. In this study, we aimed to investigate the effects of the aqueous phase (AP) produced by hydrothermal carbonization (HTC) of sewage sludge (SS) alone and the AP produced by co-HTC of rice husk (RH) and SS (RH-SS) on humification, HM bioavailability, and HMRGs during chicken manure composting. RH-SS and SS increased the humic acid content of the compost products by 18.3 % and 9.7 %, respectively, and significantly increased the humification index ( < 0.05) compared to the CK (addition of tap water). The passivation of HMs (Zn, Cu, As, Pb, and Cr) increased by 12.17–23.36 % and 9.74–15.95 % for RH-SS and SS, respectively, compared with that for CK. RH-SS and SS reduced the HMRG abundance in composted products by 22.29 % and 15.07 %, respectively. The partial least squares path modeling results showed that SS and RH-SS promoted compost humification while simultaneously altering the bacterial community and reducing the bioavailability of metals and host abundance of HMRGs, which has a direct inhibitory effect on the production and distribution of HMRGs. These findings support a new strategy to reduce the environmental risk of HMs and HMRGs in livestock manure utilization.
中文翻译:
污水污泥水热碳化水相对鸡粪堆肥过程中重金属和重金属抗性基因的影响
畜禽粪便通常受到重金属 (HM) 和 HM 抗性基因 (HMRG) 的污染,这些物质会污染环境。在本研究中,我们旨在研究单独污水污泥 (SS) 水热碳化 (HTC) 产生的水相 (AP) 和稻壳 (RH) 和 SS (RH-SS) 的联合 HTC 产生的 AP 对鸡粪堆肥过程中腐殖化、HM 生物利用度和 HMRG 的影响。RH-SS 和 SS 使堆肥产品的腐殖酸含量分别提高了 18.3 % 和 9.7 %,与 CK(添加自来水)相比,腐殖化指数(< 0.05)显著提高。RH-SS 和 SS 的 HMs(Zn、Cu、As、Pb 和 Cr)的钝化率分别比 CK 增加了 12.17-23.36% 和 9.74-15.95 %。RH-SS 和 SS 使堆肥产品中的 HMRG 丰度分别降低了 22.29% 和 15.07%。偏最小二乘路径建模结果表明,SS 和 RH-SS 促进了堆肥腐殖化,同时改变了细菌群落,降低了金属的生物利用度和 HMRGs 的宿主丰度,这对 HMRGs 的产生和分布有直接的抑制作用。这些发现支持了一项降低 HMs 和 HMRG 在畜禽粪便利用中的环境风险的新策略。
更新日期:2024-04-23
中文翻译:
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污水污泥水热碳化水相对鸡粪堆肥过程中重金属和重金属抗性基因的影响
畜禽粪便通常受到重金属 (HM) 和 HM 抗性基因 (HMRG) 的污染,这些物质会污染环境。在本研究中,我们旨在研究单独污水污泥 (SS) 水热碳化 (HTC) 产生的水相 (AP) 和稻壳 (RH) 和 SS (RH-SS) 的联合 HTC 产生的 AP 对鸡粪堆肥过程中腐殖化、HM 生物利用度和 HMRG 的影响。RH-SS 和 SS 使堆肥产品的腐殖酸含量分别提高了 18.3 % 和 9.7 %,与 CK(添加自来水)相比,腐殖化指数(< 0.05)显著提高。RH-SS 和 SS 的 HMs(Zn、Cu、As、Pb 和 Cr)的钝化率分别比 CK 增加了 12.17-23.36% 和 9.74-15.95 %。RH-SS 和 SS 使堆肥产品中的 HMRG 丰度分别降低了 22.29% 和 15.07%。偏最小二乘路径建模结果表明,SS 和 RH-SS 促进了堆肥腐殖化,同时改变了细菌群落,降低了金属的生物利用度和 HMRGs 的宿主丰度,这对 HMRGs 的产生和分布有直接的抑制作用。这些发现支持了一项降低 HMs 和 HMRG 在畜禽粪便利用中的环境风险的新策略。