a mathematical model was developed to predict the effects of wind speed, light, ph, temperature, dissolved carbon dioxide and chemical oxygen demand (cod) on dissolved oxygen (do) in fish ponds. the effects of organic feeds, aeration and fish activity were added to the model developed by kayombo et al. for waste stabilization ponds (ecological modeling 127(2000): 21-31) to reflect the situat...

Wastewater reclamation and its reuse for beneficial purposes is a common goal in all countries particularly in water stressed countries around the world. Cutting edge technologies such as reverse osmosis (RO), micro and ultra filtration etc. are often used to purify wastewater effluent generated in conventional systems. However, the rejected wastewater from these processes is usually laden with...

An experimental unit was built which located in the vicinity of domestic wastewater treatment plant Municipality San Marcos Department Carazo. Said consisted two welded metal barrels with a total height 1.8 m and diameter 0.90 m, likewise, this comprised three functional zones; first or input area composed collection unit, driving flow control distribution units; second packed zone, is axis sys...

Most of domestic wastewater is either untreated or only primarily settled by septic tanks in Taiwan. Manure produced by concentrated swine operations is also one of the primary pollution sources of watercourses. Recently, constructed wetlands have received tremendous interests as one of the contemporary alternatives employing to enhance the water quality regarding nitrogen nutrients due to the ...

Two experiments were conducted in 200-m earthen ponds at Asian Institute of Technology, Thailand, for 87 days to test the feasibility of an integrated pen-cum-pond system, which utilizes wastes from intensive culture of hybrid catfish (Clarias macrocephalus C. gariepinus) as nutrients for semi-intensive culture of Nile tilapia (Oreochromis niloticus). This integrated pen-cum-pond system enhance...

the increasing need for water in the arid areas of the world has resulted in the emergence of wastewater application for agriculture and landscape. using treated wastewater in agricultural irrigation can provide more adequate supply of high quality water for human consumption, but their heavy metal applications effect must be regulated to ensure no physiological problems for both the plant and ...

This study reports the biomass accumulation, plant nutrient concentration, and uptake rates of plants in a constructed floating wetland (CFW) installed for sewage treatment application Australia. Plant accumulation was estimated based on field samplings throughout duration study. Analysis samples each species also completed to estimate mean tissue content. The concentration were then used total...