up flow anaerobic sludge blanket (uasb) reactors have been increasingly used for industrial wastewater treatment. because of existing problems in startup step of these reactors, in this research the startup of a uasb in pilot scale and room temperature condition was studied. the total height of uasb reactor was 270 cm and effective height was 240 cm. diameter of the reactor in lower part was 20...

This paper deals with thermal drying of wastewater sludges, whose management will become crucial in the forthcoming years. Sludges collected after mechanical dewatering in 5 different WWTPs are submitted to the same convective drying treatment in order to try finding some relations between the drying behaviours, the type of effluent and wastewater treatments. Results show dearly sludge drying r...

I ntroduction Onsite wastewater systems (onsite sys­ tems) treat and dispose of wastewater (effluent) near the point of generation (U.S. Environmental Protection Agency [U.S. EPA], 2002). Onsite systems are classified as septic or advanced systems. Septic systems may be conventional and enhanced treatment units or alternative onsite systems (New York State Department of Health, 2012; North Caro...

In order to reduce the environmental pollution associated with conventional energy sources and achieve increased global demand, alterative renewable sustainable need be developed. Microbial fuel cells (MFCs) represent a bio-electrochemical innovative technology for control simultaneous production from biodegradable, reduced compounds. This study mainly considers performance of continuous up flo...

Efficient wastewater treatment technologies are needed to curb water scarcities and prevent the spread of diseases contamination sheds. Decentralized systems or respectively septic easy afford handle – especially in rural areas. In this research a developed 19.9 l (5 gal.) laboratory system containing 15 (3.96 liquid was operated at temperature 18°C (64.4°F) with collected from primary clarifie...

A financial comparison of a parallel sewer based (SB) system with activated sludge, and a fecal sludge management (FSM) system with onsite septic tanks, collection and transport (C&T) trucks, and drying beds was conducted. The annualized capital for the SB ($42.66 capita(-1) year(-1)) was ten times higher than the FSM ($4.05 capita(-1) year(-1)), the annual operating cost for the SB ($11.98 cap...

Settling-thickening tanks are used to achieve separation of the liquid and solid fractions of faecal sludge (FS). They were fi rst developed for primary wastewater treatment, and for clarifi cation following secondary wastewater treatment, and it is the same mechanism for solids-liquid separation as that employed in septic tanks. Settling-thickening tanks for FS treatment are rectangular tanks,...