Comparative study of submerged membrane bioreactor and extended aeration process coupled with tubesettler for hospital wastewater treatment

Morabet, Rachida El; Khan, Roohul Abad; Mallick, Javed; Khan, N. A.; Ahmed, Sirajuddin; Dhingra, Aastha; Khan, Amadur Rahman; Alsubih, Majed; Alqadhi, Saeed; Bindajam, Ahmed Ali

doi:10.1016/j.aej.2020.08.021

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…The highest BOD 5 removal efficiency was recorded at 0.4 ppm residual chlorine (3 L/s) and the mean values ranged from 97.39% to 97.52%. These results are in agreement with the BOD 5 removal efficiency reported for municipal wastewater of 90-98% (Pahlavanzadeh et al, 2018;El Morabet et al, 2020). The highest FC removal efficiency (99.99%) was recorded in the treatments with 0.5 ppm residual chlorine at all three flow rates.…”

Section: Treatment Of Hospital Wastewater By Residual Chlorine Applic...supporting

confidence: 91%

“…In developed countries, a hospital generates 400-1200 L of wastewater per bed per day, while in developing countries a hospital generates 200-400 L/ capita/day compared to 100-400 L/capita/day of domestic wastewater generation (Kumari et al, 2020). Hospital wastewater is different in nature compared to wastewater from other sources (El Morabet et al, 2020). The complexity of this type of wastewater has become a global problem due to its stability and persistence in the environment (Rodriguez-Moza and Weinberg, 2010; Verlicchi et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Treatment of Hospital Wastewater Using Activated Sludge with Extended Aeration

Custodio¹,

Cuadrado-Campó²,

Peñaloza³

et al. 2022

J. Ecol. Eng.

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Hospital wastewater is of a complex nature and is generally discharged into urban sewage systems. This study evaluated the removal efficiency of organic and biological contaminants from a hospital wastewater treatment plant using extended aeration activated sludge. The study was conducted at a treatment plant scale, with 14 hours of feed. The plant consists of a pre-filter, a collector and crumbler tank, a homogenization tank, two biological reactors of 80 000 liters capacity each, two settlers and a contact disinfection chamber. Three flow rates of 3 L/s, 4 L/s and 5 L/s were tested in each biological reactor, with application of three concentrations of residual chlorine with sodium hypochlorite to the effluent of the settling tanks (0.3 ppm, 0.4 ppm and 0.5 ppm). The removal efficiency of suspended solids varied according to flow rate. The reactor with a flow rate of 3 L/s and 0.5 ppm of residual chlorine achieved the highest removal of suspended solids (91.95%), biological oxygen demand (97.52%) and fecal coliforms (99.99%). Finally, the quality of the hospital wastewater is within the limits of the national and international environmental quality thresholds.

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Section: Treatment Of Hospital Wastewater By Residual Chlorine Applic...supporting

confidence: 91%