Summer has arrived at the Fengjing Water Purification Plant, where clear treated water flows steadily from the outlet into the surrounding waterways. Just months ago, this facility underwent a complete transformation — in June of this year, the third phase of the Fengjing Water Purification Plant passed environmental protection acceptance for completion and was officially put into operation. It has become the first urban sewage treatment plant in Jinshan District to achieve effluent water quality standards above Class A.
Capacity Upgrade: Daily Treatment Capacity Jumps 50%
As the tourism sector in the Fengjing area continues to heat up, nearby industrial parks and commercial facilities are being rapidly developed, leading to a significant increase in regional sewage treatment demand. The original daily treatment capacity of 28,000 cubic meters could no longer keep up with growth needs.
The third phase's secondary sedimentation tank. How was the upgrade completed without halting operations? The project adopted a "utilize existing facilities for expansion, seamless connection" approach — existing pretreatment facilities and the first-phase oxidation ditch continued to operate while new deep treatment units, including biological reaction tanks, high-efficiency sedimentation tanks, and V-type filters, were built simultaneously. Supporting processes such as chemical phosphorus removal and sodium hypochlorite disinfection were added. Through pipeline modifications, the old and new systems were connected, enabling "expansion without shutdown and capacity increase without production stoppage."
The third phase's dosing room. After the renovation, the plant's daily treatment capacity increased from 28,000 cubic meters to 42,000 cubic meters, a rise of 50%. Effluent water quality was upgraded from "Class A" to "Class A+", providing solid drainage support for Fengjing Town's integration into the Yangtze River Delta integration strategy and its development of scientific innovation services and cultural tourism industries.
A bird's-eye view of the Fengjing Sewage Treatment Plant.
Digital Empowerment: From "Relying on Experience" to "Relying on Data"
Entering the newly built smart water management control room, real-time operational data flickers on a large screen. The newly established smart water platform and mobile applications have enabled the plant to achieve a "smart transformation."
The control room. The intelligent aeration system automatically adjusts operational parameters based on incoming water quality and volume, enabling on-demand air supply and precise aeration. The sludge dosing system automatically adjusts the dosage based on online monitoring data, avoiding "experience-based dosing." Operational management has shifted from "relying on experience and manual labor" to "relying on data and intelligence," significantly improving operational efficiency and fine-tuned management levels.
Intelligent aeration field control valve.
Energy Saving and Carbon Reduction: Every Drop of Water is Fully Utilized
Within the plant grounds, irrigation and road cleaning do not use tap water but instead utilize treated reclaimed water, with a daily reuse volume of approximately 500 cubic meters. All major energy-consuming equipment uses variable frequency drives, automatically adjusting operating frequencies based on actual conditions to eliminate unnecessary energy consumption.
Intelligent aeration field control valve. Sludge undergoes deep dewatering before being transported for incineration, achieving reduction and harmless treatment. The plant uses permeable paving and grassed swales to reduce rainwater runoff at the source. Odor gases are treated through a three-stage process of "chemical scrubbing + biofilter + adsorption" before being discharged in compliance with standards — while ensuring treatment effectiveness, overall operational costs are effectively lowered, and the concept of green and low-carbon operation is maintained throughout.
Odor treatment device. Sponge city permeable paving.
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