Browsing by Author "Buaisha, Magdi"

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Citation - WoS: 4
Citation - Scopus: 4
Heavy Metal Inhibition on an Alternating Activated Sludge System and Its Comparison To Conventional Methods: Case Study of Cu²⁺
(Iwa Publishing, 2021) Buaisha, Magdi; Balku, Saziye; Ozalp-Yaman, Seniz
In order to understand the behaviour of wastewater treatment plants (WWTPs) with heavy metal presence, the present study evaluates the treatment process in the presence of heavy metals (Cu2+ as a case study) and compares it with the absence of heavy metals. An activated sludge model is improved by means of incorporating other novel inhibitory kinetic and settler models for this evaluation. To achieve this goal, a simulation algorithm is developed using the MATLAB code to detect any heavy metal influence on the aerobic and anoxic growth of heterotrophic and autotrophic biomass. The code also allows for a comparison of treatment plant performance with and without Cu2+ in both conventional and alternating systems. The results reveal that the presence of heavy metals, in case of the present study for Cu2+ at 0.5 mg/L, in a biological treatment system, has an inhibitory effect on the heterotrophic bacteria but more so on the autotrophic bacteria growth and it prevents nitrification and denitrification, thus negatively effecting on the nitrogen removal in the alternating systems.
Citation - WoS: 167
Citation - Scopus: 185
Heavy Metal Removal Investigation in Conventional Activated Sludge Systems
(C Ej Publishing Group, 2020) Buaisha, Magdi; Balku, Saziye; Ozalp-Yaman, Seniz
The combination of industrial and domestic wastewater in municipal WWTPs (waste water treatment plants) may be economically profitable, but it increases the difficulty of treatment, and also has some detrimental effects on the biomass and causes a low-quality final effluent. The present study evaluates the treatment process both in the presence and absence of heavy metals using ASM3 (activated sludge model no.3) so as to improve the model by means of incorporating other novel inhibitory kinetic and settler models. The results reveal that the presence of heavy metal, a case study for copper and cadmium at a concentration of 0.7 mgL(-1) in a biological treatment system has a negative effect on heterotrophic bacteria concentration by 25.00 %, and 8.76 % respectively. Meanwhile, there are no important changes in COD (chemical oxygen demand), SS (total suspended solids) and TN (total nitrogen) in the final effluent in the conventional system. However, all these parameters are acceptable and consistent with EU Commission Directives. The results indicate that ASM3 can predict and provide an opportunity of the operation for an activated sludge wastewater treatment plant that receives the effluent from an industrial plant.