Tourist cruises, floating houseboats and onshore restrooms in northern Quang Ninh Province's Ha Long Bay will be equipped with bio-toilets and composting systems to keep the local water clean.
A pilot project, run by the provincial People's Committee and Japan's Chodai Co Ltd, will help prevent leakage of waste water to the sea, thus, reducing breakouts of dangerous bacteria.
The technology is said to be cheaper to install and operate than normal waste treatment plants.