Wastewater Treatment System Operation and Maintenance Services

Dear valued customers,

United Construction and Environment Technology Joint Stock Company is an environmental company with more than 15 years of experience in consulting, design, construction, installation and operation and maintenance of wastewater treatment systems. With an in-depth understanding of environmental law, Hop Nhat provides full support and environmental solutions to a great many businesses, helping them focus on their business and production activities.

1. What do wastewater treatment system operation and maintenance services include?

Wastewater treatment system operation and maintenance is a turnkey service that keeps the system running stably, meeting regulatory discharge standards and consistent with the environmental documentation. Instead of building an in-house technical team, businesses can optimize costs and reduce risks by hiring a specialist provider to handle the entire cycle of operation, monitoring and periodic maintenance. The service usually covers two main areas: system operation, and periodic maintenance and servicing, ensuring the system always performs efficiently, minimizing incidents and extending equipment life.

1.1. Wastewater treatment system operation services

Operating a wastewater treatment system means controlling all of its activities to ensure the treated wastewater always meets technical standards before being discharged into the environment. Operation work typically includes:

• Monitoring the system and adjusting the treatment process as needed: Controlling parameters such as pH, DO, MLSS, flow rate and pollutant load to keep the microbial system working stably.
• Operating equipment and machinery: Running pumps, air blowers, mixers, chemical dosing systems and other equipment according to proper technical procedures.
• Checking influent and effluent quality: Sampling, performing rapid tests or sending samples for periodic analysis to ensure the treated water meets the applicable QCVN.
• Chemical dosing and control: Using chemicals (PAC, polymer, NaOH, Javel water, etc.) at the correct dosage to avoid waste and ensure treatment efficiency.
• Sludge management: Monitoring the amount of sludge generated, carrying out sludge pumping and dewatering, and proposing suitable disposal options.
• Keeping an operating log: Preparing daily operation reports to support environmental checks and inspections.
• Handling incidents: Promptly detecting and resolving problems such as shock loads, microbial die-off, non-compliant effluent and equipment shutdowns.
• Other tasks depending on the characteristics of each system and the specific requirements of the owner.

1.2. Wastewater treatment system maintenance services

Maintaining the wastewater treatment system helps detect potential faults early, sustain performance and avoid production disruptions. Maintenance work typically includes the following:

• Periodic inspection of the entire system: Assessing the condition of treatment tanks, piping, valves and electrical and mechanical equipment.
• Equipment servicing: Cleaning, lubricating and replacing worn parts of pumps, air blowers, sludge presses, etc.
• Checking measuring instruments: Ensuring pH, DO, flow meters and other instruments always give accurate readings.
• Repairing and replacing faulty equipment: Quickly fixing technical problems to minimize the impact on the treatment process.
• Cleaning tanks and piping: Removing deposits and blockages to keep the flow stable.
• Evaluating system performance: Analyzing treatment efficiency and proposing improvements or upgrades if needed.
• Operation optimization consulting: Providing solutions to reduce power and chemical costs and improve long-term treatment efficiency.
• Other tasks depending on each system and the owner's requirements. 

2. Why choose Hop Nhat's WWTP operation and maintenance services?

When operating a wastewater treatment system, businesses face not only technical issues but also pressure from increasingly strict legal requirements and environmental inspections. A lack of qualified staff or improper operation can lead to poor system performance, unnecessary costs and avoidable risks.

Understanding these challenges, our professional operation and maintenance service is designed to work alongside businesses to resolve each specific problem, optimize system performance and ensure full compliance with environmental regulations. Going beyond operation alone, the service provides a comprehensive solution covering both technical and legal aspects, so businesses can produce with peace of mind and grow sustainably.

• Resolving each system problem the business is currently facing;
• Recommending the most suitable solution.
• Receiving system inspection teams on behalf of the business;
• Providing full support to the business on environmental legal matters;
• Helping the business fulfill its environmental protection responsibilities.
• Our operation and maintenance staff are professionally trained, with extensive environmental expertise and in-depth knowledge of the technologies and operating procedures.
• Ensuring each system is operated to standard and in the most optimal way;
• Close support that minimizes risks and maximizes cost savings for the business throughout operation;
• Guaranteed effluent quality that meets regulatory discharge standards.

3. Common problems in wastewater treatment system operation

Operation and maintenance of a wastewater treatment system takes place after the system has been fully built. Like the construction phase, this phase is extremely important and requires operators to have the necessary skills and specialist knowledge to keep the system running smoothly, minimize incidents and, most importantly, ensure the effluent meets current discharge standards.

During the operation of a wastewater treatment system, attention should be paid to several common problems, such as:

Sudden increase in wastewater load:

• Caused by an increase in domestic and industrial wastewater volume.
• Production processes should be controlled, with contingency treatment plans in place for increased wastewater loads.

Excessive organic matter:

• Because the flow velocity is too low and the retention time is too long.
• The flow velocity should be adjusted by expanding or adding to the treatment system.

Floating sludge:

• Sludge accumulates and decomposes in the tank for too long, or the tank receives too much wastewater.
• Sludge should be removed regularly and the flow to the settling tank reduced.

Gas bubbles appear:

• Decomposition conditions.
• Reduce the flow and clarify the water.

Black, odorous sludge:

• The wastewater contains rapidly decomposing organic matter.
• Pre-aeration or improvements to the biological digestion tank are needed, and the inflow to the settling tank should be reduced to limit flotation.

Excessive settling:

• Due to excessively low velocity.
• Mix the water periodically and frequently.

Excessively high suspended solids:

• Sludge accumulation overload.
• Clean the tank regularly, reduce the load and lower the pumping rate.

Clogged sludge lines:

• Because the sludge is too thick.
• Clean the pipelines regularly or, if necessary, replace pipes that no longer function properly.

Rising flow levels:

• Intermittent pumping rate.
• Adjust the pumping rate together with the flow velocity, and distribute the flow in line with the tank size. 

Odor generation:

• Anaerobic decomposition or readily biodegradable biological waste.
• Maintain aerobic conditions, promote biomass growth and reduce the organic load during low-flow conditions.

Changes in sludge indices:

• Due to a high dissolved organic load.
• Reduce suspended solids by controlling the sludge index, converting digested sludge into activated sludge.

Rising sludge in the settling tank:

• Due to excessive nitrification.
• Increase the return activated sludge rate, reduce the flow velocity or reduce nitrification through aeration control.

Frothing:

• Due to detergent concentration, foam formation or reduced suspended solids.
• Apply an antifoaming agent to the surface.

Foaming:

• Due to a tank temperature that is too low or excessive accumulation of deposits.
• Maintain a pH of 6.8 – 7.2 in the digestion tank or increase the temperature.

4. Why does a wastewater treatment system need periodic maintenance?

Wastewater usually goes through several treatment stages, yet pump and valve problems or equipment failures frequently occur and affect the quality of the treated water. Moreover, the biomass is often quite sensitive to changes in the wastewater when the flow rises excessively or the organic load is too high. In addition, the presence of components such as fats, oil and grease or various toxic substances can hinder treatment if no suitable treatment procedure is in place. Maintenance requirements therefore depend on the capacity and wastewater flow. Each system requires monthly and annual periodic maintenance to support consistent, regular removal performance.

 Whether it is a small-scale treatment station or a large treatment system, system maintenance, care and process control are essential. Equipment and machinery that require maintenance include:

• Pumps;
• Air blowers/aerators;
• Submersible mixers;
• Motors;
• Filters;
• Electrical control panel system.
• Other equipment

Hop Nhat Environment provides professional, continuous wastewater treatment system operation and maintenance services that keep treatment performance stable and optimized at the design capacity. We proactively monitor and thoroughly inspect the system to promptly detect problems such as damage, leaks, odors or noise, and quickly propose suitable fixes, repairs or replacements. With a rigorous periodic maintenance program, all potential issues are brought under control early, minimizing risks and ensuring the system always operates safely and sustainably over time.

If you need operation or maintenance of a wastewater treatment system , please contact Hop Nhat Environment right away via Hotline: 0938.857.768 or send a request for quotation to email: congthongtin@moitruonghopnhat.com for dedicated support.