return icon

Da Nang pilots vetiver grass waste treatment system

A group of scientists and biological researchers from Da Nang’s Teacher Training and Engineering College has developed a vetiver (Vetiveria Zizanioides) grass-based system to treat leaks at Khanh Son dump in the city.

Getting to the root of water detoxification

Vetiver grass is used to treat waste leaks at the Khanh Son dump in Da Nang. It's the first non-chemical waste treatment pilot project on a small scale to deal with polluted waste at the dump. 

The system, which was developed on a small scale at the dump in 2018, would be applied to other dumps in the city and neighbouring provinces as well as polluted lakes and sewage systems.

Head of the research team Tran Minh Thao said the sample was designed to treat 200 litres of waste water that leaks from the dump each day, and at least 90 per cent of the waste was completely cleaned by the grass system and other biological solutions before being safely discharged.

“We have been testing the system before the city approves its deployment. The system is a non-toxic chemical treatment, while the grass roots act as a natural filter of pollutants in the waste,” Thao said.

“Four square metres of vetiver grass could soak up 200 litres of polluted waste and discharge it each day. It also helps clear bad odours, while reducing sludge after treatment,” he explained.
He said the vetiver grass-based system could be used to clean 750cu.m with an investment of VND50 billion (US$2.2 million) – half that of a chemical-based treatment system – and the system costs only VND50,000 ($2.1) to clean 1cu.m of polluted waste.

Thao said the group has been testing the vetiver grass-based system and biological solutions at some polluted lakes in the city and Quang Nam Province.

The biological sewage treatment model was used to filter 10cu.m of toxic sewage from the college’s laboratory each day from 2014, and over 90 per cent of heavy metals contained in the sewage dissolved in the process.

He said continuous tests of the grass system on wastewater treatment were carried out by the group daily from 2014.

The central city plans to build the first solid waste treatment complex project on a 100ha area in Hoa Vang District with total investment of VND138 billion ($6.13 million) in the first stage later this year. The complex will include a dump leakage treatment plant, waste recycling, and waste-to-energy system.

Khanh Son dump, 20km west of the city, receives an amount of 1,200 tonnes of waste each day, and the dump releases 700cu.m of untreated wastewater daily.

According to a report from the Vietnam Vetiver Network, over 40 provinces and cities have been planting vetiver grass to deal with water and soil pollution, desertification, erosion and stabilising river banks and sea dykes.

Geologist Tran Tan Van, director of the Vietnam Vetiver Network, said the vetiver grass has been used to protect highway dykes, cover waste dumps at coal mines, and on dioxin-contaminated soil. — VNS

Da Nang plans to separate recyclable waste

Da Nang plans to separate recyclable waste

Da Nang will spend an estimated VND8.54 trillion on investment projects to classify and recycle solid household waste, according to a plan issued by the municipal government.  

Green-tech urged for Da Nang’s dump

Green-tech urged for Da Nang’s dump

A garbage crisis in the central city of Da Nang has eased in recent days, but people living near Khanh Son Dump are still concerned about the city's plan to move the dump.


Park Hang-seo plans to set up football academy in Vietnam

Former head coach of the Vietnam national men's football team Park Hang-seo has planned to open a football academy for local young people in the coming time.

15 members of cross-border drug cartel arrested, huge haul of drugs, weapons seized

The operation, which resulted from a five-month investigation, was carried out with the cooperation of police departments in Dien Bien, Lai Chau, Lao Cai and Phongsaly and Oudomxay.

EC acknowledges Vietnam’s efforts in IUU combat: ministry

The European Commission (EC) has acknowledged Vietnam's recent efforts in enhancing the fight against illegal, unreported and unregulated (IUU) fishing, as well as its openness to the EC's recommendations.

Vietnam promotes tourism to ASEAN market

Themed "ASEAN: Journey to Wonderful Destinations", ATF 2023 is the largest annual event held alternately among the 10 members of the Association of Southeast Asian Nations.

Top 3 of Miss Universe 2022 set to visit Vietnam in late February

R'Bonney Gabriel, Miss Universe 2022, will be joined by the two runners-up of the global pageant as they take part in a working trip to Vietnam from February 23 to February 26, according to beauty website Sash Factor of the Philippines.

Vietnam weighs electricity price hikes in 2023

Vietnam is considering hiking electricity tariffs this year as the last adjustment took place almost four years ago while input costs of power generation have soared since.

Biggest spring blood donation event to kick off on February 6

The Xuan hong (red spring) festival – the biggest annual blood donation campaign of the season – will begin on February 6, expecting 6,000 units of the vitality liquid.

Vietnam-Asia trade reaches nearly 475.3 billion USD in 2022

Vietnam’s merchandise trade with Asia reached 475.29 billion USD in 2022, increasing by 9.6% compared to 2021 and accounting for the highest proportion (65.1%) in the country's total import-export value.

Revised Law on Medical Examination and Treatment promulgated

The Presidential Office on February 3 announced the Acting President’s order to promulgate the Law on Medical Examination and Treatment that was adopted by the 15th National Assembly at its second extraordinary session.

Volatile real estate market puts pressure on business results

Volatile real estate market caused revenue and profit of realty businesses to decrease sharply in the fourth quarter of 2022.


CNTraveler picks Con Dao one of best island vacations globally

Six businesses lose fuel distribution licenses

The Ministry of Industry and Trade has revoked the fuel distribution licenses from six local businesses, with effect on February 27.

ChatGPT and AI booms in Vietnam

AI and ChatGPT technologies are forecasted to explode, creating a new wave of technology this year.

Fruit exports to China increase sharply

The recovery of exports to China will contribute to boosting Vietnam's fruit and vegetable industry in 2023.

Former chairs, vice chairs of Thai Nguyen disciplined

Prime Minister Pham Minh Chinh has taken disciplinary measures against two former chairmen, two former vice chairmen and one vice chairman of the People’s Committee of Thai Nguyen Province.