Retrofit and Upgrade of Non-Compliant Wastewater Treatment Systems
Is your effluent exceeding discharge standards, or is your system overloaded or deteriorating? Nanoen surveys the plant, pinpoints the root cause and proposes a retrofit plan that makes the most of existing structures while minimising production downtime.
- Pinpoint the real cause of non-compliance
- Reuse existing infrastructure
- Construction with minimal production downtime
- Committed effluent quality
Common challenges for businesses
If you are facing any of the situations below, Nanoen can help.
Monitoring results exceed standards
Parameters such as COD, BOD, ammonium, total nitrogen and total phosphorus fail to meet discharge standards (QCVN).
System overload
Flow and pollutant loads have increased with production expansion, and the existing system can no longer cope.
Poor biomass, odour
Biological sludge dies off, foams and generates odour; chemical consumption is high but treatment efficiency is low.
Deteriorated equipment and tanks
Pumps, air blowers and pipework are damaged, while the standards set in the permit are stricter than before.
Who this service is for
- Factories with non-compliant monitoring results, or that have received warnings or penalties
- Facilities that have increased capacity or changed products, altering wastewater characteristics
- Systems that have been in operation for many years and need upgrading
- Facilities preparing to apply for or amend an Environmental Permit
Serving businesses in Hanoi, Bac Ninh, Hung Yen, Hai Phong, Ninh Binh, Phu Tho and neighbouring provinces.
Scope of work
- Condition survey and sampling at each treatment stage to assess treatment performance
- Root-cause analysis: pollutant load, technology, equipment and operating practices
- Retrofit proposal with cost estimate and schedule
- Design, construction and installation of the required additional items
- Microbial culture seeding, commissioning and fine-tuning until compliance is achieved
- Handover, operator training and support updating environmental documentation
How Nanoen works
Survey → assessment → proposal → implementation → acceptance & handover. Every step has a clear deliverable you can track.
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01
Survey
Inspect the system and sample wastewater at each treatment stage.
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02
Assessment
Identify the root cause of non-compliant effluent.
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03
Proposal
Retrofit plan, cost estimate, schedule and effluent quality commitment.
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04
Implementation
Phased retrofit works to minimise disruption to production.
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05
Acceptance
Commissioning, sampling and evaluation, handover and operator training.
Capabilities and completed projects
Photos from projects Nanoen has consulted on, designed and built.
- Since 2020working in the environmental sector
- 3 officesHanoi · Can Tho · Ho Chi Minh City
- Engineers & specialistsenvironmental compliance and engineering
- From consulting to constructionone partner from permits to plant
Frequently asked questions
Does the entire system have to be rebuilt?
Not necessarily. In many cases the existing tanks and equipment can be reused, with only some treatment stages added or modified. A solution is proposed only after an on-site survey and actual sampling.
Do we have to stop production during the retrofit?
Nanoen prioritises phased construction, temporary treatment arrangements, or carrying out works when the plant is running at reduced load, to minimise disruption to production.
How long until the effluent is compliant again?
It depends on the scope of the retrofit and the time needed to establish the microbial culture. A specific schedule is set out in the proposal before work begins.
Will environmental documentation need to be redone after the retrofit?
If the treatment works differ from what was licensed, the company may need to amend its Environmental Permit. Nanoen reviews the situation and advises on the related procedures.
Book a Site Survey
Leave your details and a Nanoen engineer will contact you about Wastewater System Retrofit.
Our offices
- HanoiSố 52 TT6 Khu đô thị Văn Phú, phường Phúc La, Hà Đông, Hà Nội
- Can Tho661E/29 Võ Văn Kiệt, KV Bình Yên A, P. Long Hòa, Q. Bình Thủy, TP. Cần Thơ
- Ho Chi Minh City533/12/7 Phạm Văn Bạch, P.15, Q. Tân Bình, TP. Hồ Chí Minh
Office locations
Số 52 TT6 Khu đô thị Văn Phú, phường Phúc La, Hà Đông, Hà Nội
Get directions533/12/7 Phạm Văn Bạch, P.15, Q. Tân Bình, TP. Hồ Chí Minh
Get directions661E/29 Võ Văn Kiệt, KV Bình Yên A, P. Long Hòa, Q. Bình Thủy, TP. Cần Thơ
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