Environmental compliance & engineering FAQ

Under Article 30 of the Law on Environmental Protection 2020, group I investment projects and certain group II projects as specified in Article 28 must conduct an Environmental Impact Assessment. The detailed list is provided in Decree 08/2022/ND-CP (as amended and supplemented).

Depending on the type of project, the competent authority is the Ministry of Agriculture and Environment, a relevant ministry or sector, or the provincial People's Committee. Nanoen identifies the competent authority right at the review stage to plan accordingly.

An EIA is carried out at the investment preparation stage to assess impacts and propose mitigation measures. An Environmental Permit is issued when the project is preparing to operate, allowing discharge under specific conditions. Projects with an approved EIA decision usually still need an Environmental Permit before official operation.

It depends on the project scale, the duration of baseline environmental monitoring, community consultation and the appraisal council's meeting schedule. Nanoen prepares a detailed timeline after the survey.

Under Article 39 of the Law on Environmental Protection 2020, group I, II and III investment projects that generate wastewater, dust or exhaust gas discharged into the environment requiring treatment, or that generate hazardous waste requiring management under regulations, must obtain one when entering official operation. Operating facilities meeting equivalent criteria are also subject to this requirement. Nanoen reviews each project specifically by industry, scale and location.

Under Article 40 of the Law on Environmental Protection 2020: 07 years for group I projects; 10 years for all other cases. The project owner or facility may request a shorter term.

The Environmental Permit integrates several former component permits, such as the certificate of completion of environmental protection works, the permit to discharge wastewater into water sources, the hazardous waste treatment permit… Nanoen will check your existing documents to determine what needs to be integrated.

The timeframe depends on the competent authority, how complete the dossier and treatment works are, and whether an on-site inspection is required. After the survey, Nanoen sends an estimated timeline for each stage.

The facility may face administrative penalties under Decree 45/2022/ND-CP, together with remedial measures; in serious cases operations may be suspended. The specific penalty depends on the scale and nature of the violation.

Under Article 49 of the Law on Environmental Protection 2020, this covers investment projects that generate waste but are not required to hold an Environmental Permit, and operating manufacturing, business and service facilities that generate waste but are not required to hold an Environmental Permit. Some cases are exempt under guiding documents. Nanoen will check each facility specifically.

The dossier is usually submitted to the commune People's Committee where the project is implemented or where the facility operates. Special cases follow the current decentralisation regulations; Nanoen will identify the place of submission during the review.

Environmental Registration does not have a validity period like an Environmental Permit. When there are changes compared with the registered information, the facility must re-register in accordance with regulations.

Properly implement the registered waste collection, treatment and transfer measures; keep records and documents for inspections; and submit environmental protection reports if applicable.

Under the Law on Environmental Protection 2020, Decree 08/2022/ND-CP, Circular 02/2022/TT-BTNMT and their amending documents, project owners and facilities subject to an Environmental Permit or Environmental Registration are generally required to report on environmental protection periodically. Nanoen reviews each facility's documents to confirm the applicable obligations.

Under current regulations, the annual report is usually submitted before 15 January of the following year to the permit-issuing authority and other relevant agencies. Deadlines and recipients may change with amending regulations, so Nanoen checks the rules that apply to your facility before submission.

Typically the Environmental Permit or Environmental Registration, production and water-use data, waste collection contracts and transfer records, and monitoring results for the year. Nanoen sends a specific checklist after reviewing your documents.

Yes. Nanoen looks into the causes, advises on corrective measures such as adjusting operation or upgrading the treatment system, and ensures the report presents the results accurately as required.

Under the Law on Environmental Protection 2020, Decree 08/2022/ND-CP, Circular 02/2022/TT-BTNMT and their amending documents, investment projects granted an Environmental Permit with waste treatment works are generally required to carry out trial operation, except in certain exempt cases. Nanoen reviews the permit and current regulations to confirm each project's specific obligations.

It depends on the type and capacity of the works and on what the Environmental Permit states under current regulations. Nanoen proposes a specific timeline after reviewing the permit and the system.

Nanoen identifies the cause, adjusts operation or proposes upgrades to the works, then arranges re-sampling. Following the system closely from the start helps avoid extending the trial period.

Sampling and analysis are carried out by a monitoring unit qualified under regulations. Nanoen helps plan and supervise sampling and compiles the results into the report.

Operator training is best held at your own treatment system so trainees practise on real equipment. Compliance sessions can be held at your premises or online.

Yes. Nanoen builds the content around your treatment technology, environmental documents and the trainees' roles, rather than using one generic syllabus for everyone.

Yes. The compliance part follows the Law on Environmental Protection 2020, Decree 08/2022/ND-CP, Circular 02/2022/TT-BTNMT and current amending documents, focusing on the obligations that apply to your company.

Nanoen hands over materials and operating log templates, and can continue to support you when the system has issues or when you need a regular operation service.

An independent party reviews the supplier technology dossier: the process, design parameters, ability to handle the expected waste input and secondary pollution control, then points out gaps or risks for the investor to clarify.

Yes. Nanoen evaluates incinerator dossiers in terms of waste input characteristics, combustion conditions, flue gas treatment and ash management, against current national standards and best available techniques.

BAT (best available techniques) are solutions proven to be environmentally effective and economically feasible. How far they apply depends on the project type and current regulations; Nanoen uses BAT as a reference when evaluating technology.

Ideally the technology description, process flow diagram, equipment specifications, list of waste types to be received and any existing environmental dossiers. Nanoen reviews them briefly and agrees the scope of the evaluation before starting.

Consulting helps you understand the problem and choose the right option: survey, assessment, technology comparison, cost estimates and proposal review. The output is a report and technical basis, and you remain free to choose any contractor for construction.

Yes. Nanoen reviews the process description, sizing calculations, equipment and operating costs in a contractor proposal, and points out weaknesses or risks so you can clarify them before signing.

Information on your industry, production capacity, water consumption, latest monitoring results and documents for any existing system. Where data is missing, Nanoen carries out additional surveys and sampling.

Wastewater characteristics, the proposed technology and expected treatment performance can serve as the technical basis for an EIA, environmental registration or permit. The specific requirements of each dossier must be checked against current regulations.

It depends on capacity, technology and site conditions. The specific schedule for each work item is agreed in the contract.

Flow rate, wastewater characteristics, the discharge standards to be met, the chosen technology and current site conditions. Nanoen provides a quotation after surveying and sampling.

Technology is selected based on wastewater analysis results, required standards, available land and operating costs. Nanoen presents a comparison of the options so that you can decide.

Yes. The warranty period is stated in the contract; after handover, Nanoen continues to support operation and maintenance whenever you need it.

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.

Nanoen prioritises phased construction, temporary treatment arrangements, or carrying out works when the plant is running at reduced load, to minimise disruption to production.

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.

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.

Nanoen provides full-time staff stationed at the plant or periodic weekly operation, depending on the capacity, technology and requirements of each system.

Yes. Responsibility is set out in the contract, provided that the influent wastewater stays within the system's design range.

Yes. Nanoen surveys and assesses the system before taking it over and proposes remedies if any parts are not fit for purpose.

Costs depend on capacity, technology, how often staff are on site and the scope of consumables (chemicals, microbial culture). Nanoen sends a quotation after the survey.

When the plant has several emission sources, a complex gas composition, or you have received different proposals and are unsure which to choose. Consulting defines the problem correctly first and reduces the risk of investing in the wrong technology.

Nanoen surveys the site and uses existing monitoring results. Where more data is needed, Nanoen works with a licensed monitoring organisation to carry out sampling and measurement.

Yes. Nanoen reviews extraction flow, fan selection, treatment equipment, consumables and operating cost in the contractor proposal, and lists points to clarify before you sign.

Typically QCVN 19 (dust and inorganic substances) and QCVN 20 (certain organic substances), plus any sector-specific standards. The applicable standards and limit values depend on the type of production and the facility's environmental permit.

It depends on the type of dust or gas, temperature, flow rate and pollutant concentrations. Usually several stages are combined, for example a cyclone and bag filter for dust, an absorption scrubber for acid gases and activated carbon for solvent vapours. Nanoen makes a recommendation after surveying and measuring.

Yes. Nanoen designs boiler dust and exhaust gas treatment systems according to the fuel type and boiler capacity.

Most equipment is prefabricated, so machines only stop for a short time for tie-in. The construction schedule is agreed with the plant in advance.

It depends on the exhaust gas flow rate and the type of production under current regulations. Nanoen reviews this and advises from the design stage.

Not necessarily. Often it is enough to rework hoods and ducts, replace the fan or add one treatment stage. A recommendation is only made after an on-site survey and measurements.

The cause is usually in the capture stage: hoods too far from the source, insufficient capture velocity, leaking ducts or a fan without enough flow. Nanoen measures each extraction point to find what needs fixing.

Most equipment is prefabricated in the workshop, so downtime is mainly for tie-in. The schedule is agreed with the plant before work starts.

If the exhaust gas treatment works change from what was permitted, the permit may need to be amended. Nanoen reviews this and advises on the related procedures.

There is no fixed interval. It depends on the type of dust or gas, concentrations and running hours. Nanoen tracks pressure drop and the actual condition of the media to recommend replacement at the right time, neither too early nor too late.

Nanoen can provide monthly or quarterly scheduled maintenance, or combine it with regular operating support, depending on the size and requirements of each system.

Yes. Nanoen surveys and assesses the system before takeover and proposes improvements if anything is not working as it should.

It depends on system size, technology, maintenance frequency and the scope of consumables (filter bags, activated carbon, chemicals). Nanoen provides a quotation after an on-site survey.