| Author | Le Van Tuan |
| Call Number | AIT RSPR no.EV-11-04 |
| Subject(s) | Sewage--Purification--Vietnam--Halong
|
| Note | A research study submitted in partial fulfillment of the requirements for the
degree of Master of Science (Professional) in
Environmental Engineering and Management, School of Environment, Resources and Development
|
| Publisher | Asian Institute of Technology |
| Abstract | This research considers a low-cost technology for wastewater treatment for Halong City, a
tourist city in Nmihem paii of Vietnam. This City, from the environmental points of view,
has the paiiicular requirement to conserve the environment of Halong Bay, where
wastewater from the city is discharged to. This is because Halong Bay has twice
recognized as the World Heritage of natural beauty and biodiversity.
Halong City has proper conditions to develop a low cost technology wastewater treatment
plant. In which constructed wetland has many advantages including treatment efficiency.
Ve1iical flow constructed wetland is considered to be the most proper solution, because of
(1) the treatment efficiency, which can remove up to 95- 97% BOD, COD; 85% SS;
Nitrogen and phosphorus; (2) low investment and operational costs that suitable with the
economical capability of Holong City and; (3) Biodiversity conservation for Halong bay. It
is very important reason for an application of constructed wetland for Halong city to
contribute to the biodiversity conservation of Halong Bay. Constructed wetland once to be
constructed should enhance both the nature beauty and biodiversity conservation of the
World heritage ofHalong bay.
As an agricultural tropical country, Vietnam has potential oppmiunity to develop wetland
for wastewater treatment in the way of biodiversity conservation, patiicularly in cities like
Halong where nature condition and biodiversity are critical factors for conservation of
Halong bay. In comparison with the existing SBR technology WWTP capacity
7,000m3
/day, constructed wetland does not require much more land (7.5ha compared with
7.0ha of existing WWTP) and effluent concentrations are bellow the effluent standard
(expected results are: BOS = 9 -24mg/l; NH3 - N = 1 lmg/l; COD = 12 - 32mg/l; SS =
27mg/l; and TP = 4 mg/I)
There would be a difficult is that wetland has not been yet constructed anywhere else in
Vietnam except pilot scale studies. This actual fact leads to the situation that there have not
enough practical understanding and experience on construction and operation of
wastewater wetland. Therefore it should request more understanding on wetland design
and operation to ensure constructed wetlands for municipal wastewater treatment are
advantaged option in Vietnam. This is also the expectation of the Research Study. |
| Year | 2011 |
| Type | Research Study Project Report (RSPR) |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Thammarat Koottatep ;Shipin, Oleg; |
| Examination Committee(s) | Annachhatre, Ajit P. ; |
| Degree | Research Studies Project Report (M. Sc.) - Asian Institute of Technology, 2011 |