Efficacy Analysis of Ancient Town River Treatment Using Microbial Technology—A Case Study of Luzhi Ancient Town River Treatment in China

Zinong Zhu

doi:10.54097/n16myk76

Authors

Zinong Zhu

DOI:

https://doi.org/10.54097/n16myk76

Keywords:

Ancient Town River, In-situ Remediation, Distributed Equipment, Microbial Augmentation, Eutrophication, Efficacy Analysis.

Abstract

The river water environment treatment in historical and cultural ancient towns generally faces multiple challenges, such as complex pollution sources, poor water flow, limited ecological space, and the need for cultural heritage and landscape protection. Traditional large-scale hydraulic or biochemical engineering is difficult to apply. This study selected a 1000-meter typical river section (initial water quality: worse than Grade V) in Luzhi Ancient Town, Suzhou City, Jiangsu Province, deployed a distributed microbial integrated treatment device, and conducted an in-situ remediation pilot study for about 1.5 months (from August 1 to September 12, 2025). The results show that the system exhibited good pollutant removal effects without significantly impacting the ancient town's landscape or navigation. After 45 days of operation, the concentrations of ammonia nitrogen (NH3-N), total nitrogen (TN), and total phosphorus (TP) at each monitoring point decreased significantly, with TN removal rates reaching 77.8%-82.3% and TP removal rates reaching 82.5%-85.0%. Water quality indicators improved from worse than Grade V to Grade III~V surface water standards, and water body turbidity was visibly reduced with significant sensory improvement. The study confirms that distributed microbial in-situ remediation technology is a low-impact, high-efficiency, and environment-friendly viable solution for solving such water environment problems in spatially sensitive areas.

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