WWTP Process Control
Full-Process Monitoring for Daqing High-Tech Zone's Linyuan WWTP
1 / 4Project Background
Built in 2019, the Linyuan industrial wastewater plant in Daqing's High-Tech Zone treats 15,000 m³/day in its first phase — greatly improving the surrounding water environment and protecting the local watershed's quality and ecological balance.
Customer Challenge
The plant needed full-process monitoring — influent, every treatment stage and effluent — with data solid enough to feed the municipal and provincial environmental bureaus' supervision systems in real time. Legacy single-parameter instruments with lagging data could not support either process control or compliant reporting.
The TENGINE Solution
TENGINE supplied a complete package of 60+ instruments. At the inlet and outlet: COD, ammonia nitrogen, total phosphorus, total nitrogen, pH, turbidity and residual-chlorine analyzers, with data uploaded in real time to the municipal and provincial environmental platforms. Along the process: suspended-solids (sludge) concentration meters, dissolved oxygen, turbidity, pH, ORP, flow and level instruments for continuous operational visibility.
Implementation
The full package was installed across the plant's inlet, process stages and outlet — the customer later praised the professional, meticulous installation with clean wiring and a tidy finish.
Project Results
The plant now achieves compliant influent/effluent monitoring with real-time reporting to the environmental authorities, and full-process data supports intelligent operation — the customer confirms the instruments perform well and reflect water conditions accurately, contributing to regional water-pollution control.
Related Case Studies
A mega-project of this scale places extreme demands on water quality data  accuracy and stability must hold over decades of operation. The wastewater treatment works required continuous online monitoring of oil content in water: a demanding measurement that has to run unattended in a harsh coastal desert environment, resist fouling, and integrate cleanly into plant process control.
Membrane performance calibration demands precise, time-aligned and traceable water-quality data to verify retention, anti-fouling and cleaning-recovery behavior. The pain points were acute: micro-leakage is hard to detect, and instrument drift under variable operating conditions contaminates the baseline data that the whole evaluation depends on.
Sludge concentration and blanket-level measurement were unreliable, so discharge relied on operator experience. Timing and volume were hard to control precisely — under-discharge, over-discharge and sludge loss all occurred, destabilizing effluent quality and pushing up running costs.
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