Characterization of the residual sludge from the wastewater treatment plant of JERADA

The wastewater treatment plant of the city of JERADA is an aerated lagoon type, it is located in the west of the city of JERADA, It was put into service in 2016 and it is part of the national Moroccan liquid sanitation program, which requires an increasing of the rate of wastewater treatment. Indeed, said STEP generates on the one hand a clean sanitized water with an average flow of 2500 m3/d, which is discharged into the receiving environment without any environmental damage, and on the other handa huge quantities of residual sludge 1740.24 kg/d. The most suitable technique for the management of sewage sludge of the JERADA STATION is their valorization in agriculture after their composting. Such a process requires beforehand a physico-chemical and biological characterization of the station residual sludge.

Download Full-text

Modeling and recycling simulation of the wastewater treatment plant of the city of Mrirt

Water Practice & Technology ◽

10.2166/wpt.2013.018 ◽

2013 ◽

Vol 8 (3-4) ◽

pp. 323-329

Author(s):

Siham Belarbi ◽

Mustapha Mahi ◽

Youssef Abarghaz ◽

Najib Bendaou

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Sewage Treatment ◽

Treatment Plant ◽

Sewage Treatment Plants ◽

Simulation Results ◽

The One ◽

The Impact ◽

The City ◽

Anaerobic Lagoons

This work focuses on the wastewater treatment plant (WWTP) in the city in Morocco called ‘Mrirt’. This WWTP produces quite noticeable odors especially from the anaerobic ponds, leading to the search for a solution to reduce odors. The location is not far from habitations. The solution chosen is the recycling of effluent from the exit of the plant towards the anaerobic ponds. The study consists in modeling the effect of recycling wastewater. Modeling discussed is to bring the operation of the anaerobic and facultative ponds by mathematical models that can then be used to perform simulations of the projected order to determine the impact on the recycling wastewater solution. Recycled effluent and its injection into anaerobic lagoons is a process and a new experience in Morocco. The simulation results of this new principle are quite promising and may thus constituted a platform for future projects of sewage treatment plants on the one hand and for projects and solutions to reduce odors from anaerobic lagoons on the other hand. It should be noted that it was very difficult to choose the parameters used as input data for modeling anaerobic lagoons.

Download Full-text

Coordination Between the Operation of the Sewerage Network and the Wastewater Treatment Plant: Demonstration of Different Strategies in Halmstad, Sweden

Water Science & Technology ◽

10.2166/wst.1993.0296 ◽

1993 ◽

Vol 27 (12) ◽

pp. 177-181

Author(s):

Claes Hernebring ◽

Jan Falk

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Treatment Plant ◽

The City ◽

Sewerage Network

The strategies developed by the city of Halmstad, Sweden, to improve coordination between the operation of the sewerage network and the wastewater treatment plant are outlined

Download Full-text

Isolation and characterization of organic matter-degrading bacteria from coking wastewater treatment plant

Water Science & Technology ◽

10.2166/wst.2018.427 ◽

2018 ◽

Vol 78 (7) ◽

pp. 1517-1524 ◽

Cited By ~ 2

Author(s):

Riqiang Li ◽

Jianxing Wang ◽

Hongjiao Li

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Removal Rate ◽

Treatment Plant ◽

Coking Wastewater ◽

Naphthalene Degradation ◽

Isolation And Characterization ◽

Degrading Bacteria

Abstract As a step toward bioaugmentation of coking wastewater treatment 45 bacteria strains were isolated from the activated sludge of a coking wastewater treatment plant (WWTP). Three strains identified as Bacillus cereus, Pseudomonas synxantha, and Pseudomonas pseudoaligenes exhibited high dehydrogenase activity which indicates a strong ability to degrade organic matter. Subsequently all three strains showed high naphthalene degradation abilities. Naphthalene is a refractory compound often found in coking wastewater. For B. cereus and P. synxantha the maximum naphthalene removal rates were 60.4% and 79.8%, respectively, at an initial naphthalene concentration of 80 mg/L, temperature of 30 °C, pH of 7, a bacteria concentration of 15% (V/V), and shaking speed of 160 r/min. For P. pseudoaligenes, the maximum naphthalene removal rate was 77.4% under similar conditions but at 35 °C.

Download Full-text