Vinh City Centralized Wastewater Treatment Plant has problems, the operating unit has difficulty in fixing them

The incident happened toVinh City Centralized Wastewater Treatment Plantat 3:30 p.m. on February 8, 2023. At this time, Vinh Urban Infrastructure Management and Development Joint Stock Company was operating the factory when the inverter of air blower No. 5 had an explosion, tripped the circuit breaker, and could not operate.

The inverter equipment of the air blower at the Vinh City Central Wastewater Treatment Plant was damaged by fire and explosion. Photo: Contributor

At 8:00 a.m. on February 9, 2023, Vinh Urban Infrastructure Management and Development Joint Stock Company coordinated with Vinh City Construction Investment Project Management Board to inspect and confirm the damage of air blower inverter No. 5. Specifically, the 3-phase Diode bridge, 37kW capacity Mainboard, 37kW power IC, oscillating Mainboard, 3-phase Aptomat - 100A - Mitsubisi were burned and damaged.

According to the staff of Vinh City Urban Management Department, the incident of the air blower inverter fire has caused the wastewater treatment of the factory to be interrupted and the capacity to be reduced. In recent days, the Urban Management Department has been working with Vinh Urban Infrastructure Management and Development Joint Stock Company and Vinh City Construction Investment Project Management Board to find a temporary solution.

Wastewater treatment tank system of Vinh City Centralized Wastewater Treatment Plant. Photo: Nhat Lan

“Because the repair takes time and is not guaranteed to be long-term, on February 9, Vinh Urban Infrastructure Management and Development Joint Stock Company reported the incident in writing, proposing that the city purchase a new air blower inverter to replace it. But in reality, finding a compatible device is not simple, it takes a lot of time…” – an officer from the Urban Management Department discussed.

Vinh City Centralized Wastewater Treatment Plant has 4 wastewater treatment tanks, with a licensed capacity of 25,000m³/day and night. Due to an accident, only 2 tanks can operate, resulting in a 50% reduction in capacity. The factory has two emergency reservoirs with a fairly large capacity, designed to hold over 70,000m³However, there is a lot of wastewater so at some times there is a situation where the wastewater overflows.

For the past 4 months, due to the problem of sludge settling in the sewer line, separation well, manhole..., wastewater overflowing into the North Canal has not been resolved or treated. Photo: Nhat Lan

On the afternoon of February 13, 2023, contacting Mr. Vo Tuan Anh - Deputy Director of Vinh Urban Infrastructure Management and Development Joint Stock Company, we learned that the troubleshooting work is being urgently carried out. "This afternoon, we have handled the operation of one more tank, and we will try to handle tank number 5 so that it can be operated again in the next few days..." - Mr. Vo Tuan Anh discussed.