School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450000, China.
Henan Key Laboratory of Water Environment Simulation and Treatment, Zhengzhou, 450046, China.
Environ Sci Pollut Res Int. 2018 Dec;25(35):35154-35163. doi: 10.1007/s11356-018-3438-4. Epub 2018 Oct 17.
In order to enhance the efficiency and benefits of the sludge anaerobic digestion process, KFeO was added to a sludge anaerobic digestion system, and its effects on the system were comprehensively investigated. Results showed that sludge anaerobic digestion was greatly improved by adding 500 mg/L KFeO. Biogas and methane productions were increased by 26.6 and 28.4%, respectively. Sludge reduction, protein removal, and the conversion efficiency of dissolved organics were all improved. The mechanism revealed that the disintegration of sludge flocs, enhancement of protease activity, and decrease of soluble sulfide toxicity on microorganisms contributed to biogas production and sludge reduction. Biogas quality was improved, benefitting from the decreasing HS content in biogas; as additionally, the cost of biogas desulfuration was reduced. In the biogas slurry treatment, the PO-P concentrations were decreased by 39%, which also reduced the cost of the dephosphorization processes at certain extent.
为提高污泥厌氧消化过程的效率和效益，在污泥厌氧消化系统中投加高铁酸钾（KFeO），并综合考察其对系统的影响。结果表明，投加 500mg/L KFeO 可显著促进污泥厌氧消化。沼气和甲烷产量分别提高了 26.6%和 28.4%。污泥减量、蛋白质去除率以及溶解有机物的转化率均得到提高。作用机制表明，污泥絮体的解体、蛋白酶活性的增强以及溶解态硫化物对微生物毒性的降低有助于沼气的产生和污泥的减少。沼气质量得到改善，得益于沼气中 HS 含量的降低；此外，还降低了沼气脱硫的成本。在沼气液处理中，PO-P 浓度降低了 39%，这也在一定程度上降低了除磷工艺的成本。
