A full scale waterwheel-rotating biological contactor (WRBC) with resource recovery means treating sewage in rural region

IF 3.9 2区环境科学与生态学 Q1 ECOLOGY

Ecological Engineering Pub Date : 2025-05-08 DOI:10.1016/j.ecoleng.2025.107665

Jiansheng Huang , Xin Wen , Deshao Liu , Shuangkou Chen , Qian Tang , Guoming Zeng

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引用次数: 0

Abstract

Wastewater treatment in rural China with better energy efficiency and recyclability is in urgent demand. In this demonstration project study, a novel process consisting of a waterwheel-rotating biological contactor (WRBC) and plants purification system was developed to treat rural sewage with a design flow of 20m³/d. The removal efficiency of COD, TN (total nitrogen), TP (total phosphorus) was 76 %–87 %, 52 %–66 % and 67 %–79 %. Microbial communities of biofilm sludge and suspended sludge in WRBC system, together with sludge attached to plant roots in plants purification system were analyzed and compared. Data of similar facilities (electricity consumption required) at 22 wastewater treatment plants (WWTPs) were collected to evaluate the process operation cost level. The operating energy consumption of this project was 21 %–40 % lower than that of A²/O process and 24 %–36 % lower than that of bio-contact oxidation process. The system had the advantage of removing pollutants with low economic cost and could realize resource recovery through economic crop planting, which may give references in the development of a circular economy at the WWTPs in rural areas.

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一种大型水轮旋转资源型生物接触器（WRBC）是处理农村污水的一种方法

中国农村污水处理迫切需要提高能效和可回收性。在本示范项目研究中，开发了一种由水轮旋转生物接触器（WRBC）和植物净化系统组成的新型工艺来处理设计流量为20m3/d的农村污水。对COD、TN、TP的去除率分别为76% ~ 87%、52% ~ 66%和67% ~ 79%。对WRBC系统中生物膜污泥和悬浮污泥以及植物净化系统中附着污泥的微生物群落进行了分析和比较。收集了22个污水处理厂类似设施（所需耗电量）的数据，以评估工艺运行成本水平。该项目的运行能耗比A2/O法低21% ~ 40%，比生物接触氧化法低24% ~ 36%。该系统具有去除污染物经济成本低、可通过经济作物种植实现资源回收的优点，可为农村污水处理厂发展循环经济提供参考。

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来源期刊

Ecological Engineering 环境科学-工程：环境

CiteScore

8.00

自引率

5.30%

发文量

293

审稿时长

57 days

期刊介绍： Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. The journal is meant for ecologists who, because of their research interests or occupation, are involved in designing, monitoring, or restoring ecosystems, and can serve as a bridge between ecologists and engineers. Specific topics covered in the journal include: habitat reconstruction; ecotechnology; synthetic ecology; bioengineering; restoration ecology; ecology conservation; ecosystem rehabilitation; stream and river restoration; reclamation ecology; non-renewable resource conservation. Descriptions of specific applications of ecological engineering are acceptable only when situated within context of adding novelty to current research and emphasizing ecosystem restoration. We do not accept purely descriptive reports on ecosystem structures (such as vegetation surveys), purely physical assessment of materials that can be used for ecological restoration, small-model studies carried out in the laboratory or greenhouse with artificial (waste)water or crop studies, or case studies on conventional wastewater treatment and eutrophication that do not offer an ecosystem restoration approach within the paper.