Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, China.
Yuhang Chengxi Water Purification Co., Ltd., Hangzhou 311121, China.
Sci Total Environ. 2023 Jun 10;876:162799. doi: 10.1016/j.scitotenv.2023.162799. Epub 2023 Mar 11.
A novel pilot-scale advanced treatment system combining waste products as fillers is proposed and established to enhance the removal of nitrate (NO-N) and phosphate (PO-P) from secondary treated effluent. The system consists of four modular filter columns, one containing iron shavings (R1), two containing loofahs (R2 and R3), and one containing plastic shavings (R4). The monthly average concentration of total nitrogen (TN) and total phosphorus (TP) decreased from 8.87 to 2.52 mg/L and 0.607 to 0.299 mg/L, respectively. Micro-electrolysis of iron shavings produces Fe and Fe to remove PO-P, while oxygen (O) consumption creates anoxic conditions for subsequent denitrification. Gallionellaceae, iron-autotrophic Microorganisms, enriched the surface of iron shavings. The loofah served as a carbon source to remove NO-N, and its porous mesh structure facilitated the attachment of biofilm. The plastic shavings intercepted suspended solids and degraded excess carbon sources. This system can be scaled up and installed at wastewater plants to improve the water quality of effluent cost-effectively.
提出并建立了一种新型中试规模的高级处理系统，结合废弃物作为填充料，以增强从二级处理废水中去除硝酸盐（NO-N）和磷酸盐（PO-P）的能力。该系统由四个模块化过滤柱组成，一个装有铁屑（R1），两个装有丝瓜络（R2 和 R3），一个装有塑料屑（R4）。每月平均总氮（TN）和总磷（TP）浓度分别从 8.87 降至 2.52mg/L 和从 0.607 降至 0.299mg/L。铁屑的微电解产生 Fe 和 Fe 以去除 PO-P，而氧（O）消耗则为后续反硝化创造了缺氧条件。铁自养微生物富集在铁屑的表面。丝瓜络作为去除 NO-N 的碳源，其多孔网结构有利于生物膜的附着。塑料屑拦截悬浮固体并降解多余的碳源。该系统可以放大并安装在废水处理厂，以经济有效地改善废水的水质。
