Made-in-Vietnam waste water treatment can be used in industrial zones

ETM-hika system can separate raw and fine garbage to remove large-size waste and impurities, which, combined with the application of physicochemical technology, can eliminate harmful substances and protect the environment.

CESTI (Center for Science and Technology Information) and ETM (Environmental Mechanical JSC) introduced the technology on treating waste water in IZs.

Made-in-Vietnam waste water treatment can be used in industrial zones

According to MONRE, 283 IZs which produce 550,000 cubic meters of waste water a day, but only 5 percent of IZs have concentrated waste water treatment systems.

IZ waste water is from three major sources, including production activities of the factories in IZs, or production waste water; domestic waste water from workers’ daily activities; and rainwater and overflow water.

The major components of pollutants in waste water include heavy metals, grease, persistent organic substances (found in waste water from pharmaceutical production, agriculture, chemicals, textile, dyeing and rubber production), strong acids and basalt salts, or ionized organic matter.

IZ waste water is from three major sources, including production activities of the factories in IZs, or production waste water; domestic waste water from workers’ daily activities; and rainwater and overflow water.

According to Nguyen Dieu Linh, branch director of ETM, the waste water treatment is a combination of many solutions effective for every kind of waste.

There are five phases of the waste water treatment process. Waste water, after collected and having large-size impurities, will go to a conditioner tank for flow regulation and concentration stabilization. After that, it will have BOD and COD treated with aerobic microorganisms.

The third phase will convert organic matter into CO2 and H2, and together with the oxidation of NH3, turn into NO2 and NO3. The final product of the process is N2, which is released to the environment.

 

After that, a mechanical method will be applied to remove suspended substances left. And finally, disinfection will be used to kill harmful bacteria in water to ensure the microbial safety for waste water before it goes to receiving sources.

The treatment path of waste water in IZs will be as follows: The waste water, after being removed of raw large-size impurities, will be pumped into a tank where smaller-size impurities will be removed. In the tank, the gas distribution system will mix to regulate the flow and input waste water concentration. At the same time, the pH will be neutralized by the quantitative chemical system under the control of pH controller.

After that, the waste water will be pumped into another tank, where, under the effect of PAC and polymer, inorganic suspended matter will be bound into flakes which can easily settle down.

The waste water will later go to an Anoxic tank, which can remove a part of organic substances, then to an Aerotank where COD and BOD will be treated, and later to a settling tank and disinfection tank, and finally to pressure filter equipment.

The treated waste water meets the QCVN 40: 2011/BTNMT standard. 

Mai Chi

More sources of waste water appear, posing challenges for management agencies

More sources of waste water appear, posing challenges for management agencies

The volume of domestic waste water continues to rise, especially in populous areas, challenging management agencies.

Action needed to check waste water pollution in Ha Long, Cat Ba

Action needed to check waste water pollution in Ha Long, Cat Ba

The Ha Long-Cat Ba Alliance has called for addressing the pollution caused by waste water in Ha Long Bay and the Cat Ba Archipelago using technology.

 
 

Other News

.
HCM City's many flood-prevention programs still not solving problems
HCM City's many flood-prevention programs still not solving problems
SCI-TECH & ENVIRONMENTicon  14/07/2020 

Tens of trillions of dong have been spent to develop the flood control system on HCM City, but the situation appears to be getting worse.

HCM City takes steps to reduce vehicle emissions
HCM City takes steps to reduce vehicle emissions
SCI-TECH & ENVIRONMENTicon  13/07/2020 

Ho Chi Minh City is carrying out multiple methods and programmes to reduce air pollution and CO2 emissions in its aim to create a "clean, green and beautiful" city.

Six-man squad protects animals in Son Tra Peninsula
Six-man squad protects animals in Son Tra Peninsula
SCI-TECH & ENVIRONMENTicon  13/07/2020 

Son Tra Nature Reserve is known as the “green lung” of Da Nang City with a diverse eco-system and thousands of flora and fauna species.

Binh Duong fines 87 units for environment violations in first half
Binh Duong fines 87 units for environment violations in first half
SCI-TECH & ENVIRONMENTicon  11/07/2020 

Eighty-seven facilities were fined for environmental violations in southern Bình Dương Province in the first half of 2020, according to local Department of Natural Resources and Environment.

Will the sand in the Red River be depleted in 100 years?
Will the sand in the Red River be depleted in 100 years?
SCI-TECH & ENVIRONMENTicon  13/07/2020 

Ninety percent of sediment is trapped in Chinese and Vietnamese reservoirs, which will lead to erosion, according to Mai Van Bieu, an underground-work expert.

HCM City aims to reduce water pollution by 90 percent
HCM City aims to reduce water pollution by 90 percent
SCI-TECH & ENVIRONMENTicon  11/07/2020 

HCM City authorities have ordered the city Department of Natural Resources and Environment to work with agencies and district authorities to strictly monitor the discarding of litter and untreated sewage in canals in the city.

Forest fires a burning problem during dry season in Vietnam
Forest fires a burning problem during dry season in Vietnam
SCI-TECH & ENVIRONMENTicon  10/07/2020 

As many as 160 forest fires were reported across Vietnam in the last six months, destroying about 756ha of forest, according to the Vietnam Fire and Rescue Police Department under the Public Security Ministry.

A high-school student successfully extracts calcium from tuna bones
A high-school student successfully extracts calcium from tuna bones
SCI-TECH & ENVIRONMENTicon  10/07/2020 

A high-school student has discovered a simple way of extracting calcium from tuna bones.

Contest launched to seek digital transformation solutions
Contest launched to seek digital transformation solutions
SCI-TECH & ENVIRONMENTicon  09/07/2020 

Viet Solutions 2020, a contest seeking solutions for digital transformation process in Vietnam for individuals and businesses over the world, was launched by the Ministry of Information and Communication and Viettel Group.

VNPT-invested undersea cable connected to Vietnam
VNPT-invested undersea cable connected to Vietnam
SCI-TECH & ENVIRONMENTicon  09/07/2020 

The Southeast Asia – Japan 2 Cable System (SJC2), invested by a consortium including the Vietnam Posts and Telecommunications Group (VNPT), has been connected to Vietnam.

Drought in Mekong Delta worsens due to hydropower, water diversion
Drought in Mekong Delta worsens due to hydropower, water diversion
SCI-TECH & ENVIRONMENTicon  09/07/2020 

Since countries in the upper course of the Mekong River have diverted water, problems related to drought, saline intrusion and landslides in Mekong Delta have become worse.

The journey of a Vietnamese student to an internship at NASA
The journey of a Vietnamese student to an internship at NASA
SCI-TECH & ENVIRONMENTicon  10/07/2020 

After receiving a full scholarship worth VND6 billion to study at a university in the US, Nguyen Hoang Ngan won an internship at NASA (the National Aeronautics and Space Administration) thanks to his creative science projects.

VN develops new rice variety for flood and drought-prone areas
VN develops new rice variety for flood and drought-prone areas
SCI-TECH & ENVIRONMENTicon  09/07/2020 

New rice seed variety which is capable of adapting to climate change has been planted in flood and drought-prone regions in north and south central provinces.

HCM City develops wide-ranging AI strategy
HCM City develops wide-ranging AI strategy
SCI-TECH & ENVIRONMENTicon  09/07/2020 

HCM City is drawing up a wide-ranging plan to promote artificial intelligence (AI) development and research in the near future, Duong Anh Duc, deputy chairman of the HCM City People’s Committee, has said.

TikTok: Chinese app may be banned in US, says Pompeo
TikTok: Chinese app may be banned in US, says Pompeo
SCI-TECH & ENVIRONMENTicon  08/07/2020 

US Secretary of State hints that Chinese apps - like TikTok - could be targeted.

Mobifone blocks subscribers making spam calls
Mobifone blocks subscribers making spam calls
SCI-TECH & ENVIRONMENTicon  08/07/2020 

Viet Nam Mobile Telecom Services Corporation (Mobifone) has launched a system to detect and prevent spam calls using big data technology (Big Data),...

COVID-19 a once-in-a-century opportunity to boost digital transformation
COVID-19 a once-in-a-century opportunity to boost digital transformation
SCI-TECH & ENVIRONMENTicon  08/07/2020 

The COVID-19 pandemic was offering a once-in-a-century opportunity for Vietnam to boost digital transformation on a national scale, Minister of Information and Communications Nguyen Manh Hung said at the ministry’s conference on Monday.

Lang Hoa Lac High Tech Park will become tech centre for Vietnam
Lang Hoa Lac High Tech Park will become tech centre for Vietnam
SCI-TECH & ENVIRONMENTicon  09/07/2020 

Tran Dac Trung, deputy director of the Lang Hoa Lac High Tech Park, speaks on the park’s plan to become a tech hub in Vietnam.

Ca Mau aims for sustainable development with nuclear technology
Ca Mau aims for sustainable development with nuclear technology
SCI-TECH & ENVIRONMENTicon  09/07/2020 

Following successful cooperation with Quang Ngai province, the Vietnam Atomic Energy Institute (Vinatom) has begun cooperating with Ca Mau to solve local problems with nuclear engineering and radiation technology.

Con Dao struggling to deal with waste disposal headache
Con Dao struggling to deal with waste disposal headache
SCI-TECH & ENVIRONMENTicon  07/07/2020 

Authorities in Con Dao District in the southern province of Ba Ria-Vung Tau are facing overloaded waste disposal at a local dumping site.

 
 
 
Leave your comment on an article

OR QUICK LOGIN