Treatment of Residential Complexes’ Wastewater using Environmentally Friendly Technology

Alattabi, Ali W.; Harris, Clare; Alkhaddar, Rafid; Alzeyadi, Ali; Hashim, Khalid

doi:10.1016/j.proeng.2017.08.009

Cited by 74 publications

(19 citation statements)

References 12 publications

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“…These stages are fill, react, settle, draw and idle. It has been reported that SBRs require less area, are flexible to operate and can be operated automatically [5,6]. However, solid-liquid separation, or sludge bulking, is still one of the most problematic issues with SBRs and ASPs in general [7,8].…”

Section: Introductionmentioning

confidence: 99%

Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

Alattabi

Harris

Alkhaddar

et al. 2017

Journal of Water Process Engineering

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Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor http://researchonline.ljmu.ac.uk/id/eprint/7679/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. (2017) Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor. Journal of Water Process Engineering, 20. pp. 207-216. ISSN 2214-7144 LJMU Research Online Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor Abstract Sludge settleability is considered one of the main drawbacks of sequencing batch reactors. The aim of this study therefore is to improve sludge settleability by introducing a novel, two-stage settling sequencing batch reactor (TSSBR) separated by an anoxic stage. The performance of the TSSBR was compared with that of a normal operating sequencing batch reactor (NOSBR), operating with the same cycle time. The results show a significant improvement in sludge settleability and nitrogen compound removal rates for the TSSBR over the NOSBR. The average removal efficiencies of NH3-N, NO3-N and NO2-N have been improved from 76.6%,86.4% and 87.3% respectively for the NOSBR to 89.2%, 95.2% and 96% respectively for the TSSBR. In addition, the average SVI30 for the NOSBR has been reduced from 42.04 ml/g to 31.17 ml/g for the TSSBR. After three months of operation, there was an overgrowth of filamentous bacteria inside the NOSBR reactor, while the morphological characteristics of the sludge inside the TSSBR reactor indicated a better and homogenous growth of filamentous bacteria.

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Section: Introductionmentioning

confidence: 99%

Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

Alattabi

Harris

Alkhaddar

et al. 2017

Journal of Water Process Engineering

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“…Additionally, according to the environmental parameters recorded during the period of study and the statistical analysis, two facts were concluded. The first fact was that controlling the Optimum Velocity Gradient of the Coagulation-Flocculation process gave the highest contribution ratio of the models, as reported by equations (8) and (9). The second fact was that the most significant parameter (statistically) in the flocculation process was the initial turbidity, as shown by equations (6), (7), (8), (9), (10) and (11).…”

Section: Resultsmentioning

confidence: 95%

“…5-That GO ranged between 25 and 55 1/s for cactus and okra, according to Table 3. 6-That TO ranged between 20 and 30 min. for cactus and okra, according to Table 4. 7-That models (8) and (9) were the most reliable models that can predict residual turbidity of the Euphrates river/Al-Mashroo canal/Al-Mussaib/Iraq, given the initial turbidity.…”

Section: Modelling Residual Turbidity ( 2 ) For Optimum-flocculation-mentioning

confidence: 99%

“…In addition, the direct addition method produces large volumes of sludge [5,6]. Then, the generated flocs will be removed from the solution using one of a number of different methods [8][9][10]. Although a large number of chemicals have been used as coagulants, aluminium sulphate (alum) is the commonly used coagulant in many countries [6,11,12].…”

Section: Introductionmentioning

confidence: 99%

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Statistical modelling of turbidity removal applied to non-toxic natural coagulants in water treatment: a case study

Al-Saati¹,

Hussein²,

Abbas³

et al. 2019

Desalination and Water Treatment

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An investigation into two non-toxic natural coagulants abundantly growing in different countries, cactus (Opuntia spp.) and okra was performed on monthly river water samples (one-year period). The studied case was the Euphrates river/Al-Mashroo canal/Iraq. Six statistical models were interpreted and tested describing the residual turbidity after Coagulation-Flocculation for the three studied cases (Optimum-Coagulant-Dose, Optimum-Flocculator-Velocity-Gradient and Optimum-Flocculation-Time). According to the environmental parameters recorded during the study and the statistical analyses, two facts were concluded. The first fact was that controlling the Optimum-Flocculator-Velocity-Gradient of the Coagulation-Flocculation process gave the highest contribution ratio of the models. The second fact was that the most significant environmental parameter (statistically) in the Coagulation-Flocculation process was the initial turbidity. This was proved for the two natural coagulants under study. Also, from the results of the study, it was concluded that the two natural coagulants were of similar coagulation-flocculation properties, and they were competent for turbidity removal.

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“…Further, the EC technique does not require chemicals injections to elevate the treatment performance (except for the case where the ionic strength is weak so supporting electrolyte should be added to increase the solution electric conductivity [45]), and it may be with ease automated and combined with additional treatment setups [46] [47] [48]. In addition, EC technology hugely decreases the volume of the formed solid waste (sludge) that needs elevated treatment cost [49] [50]; which successively greatly reduces the working price of the EC technique [51] [52]. These merits of the EC process place it extremely encouraging choice to the classical treatment techniques [53] [54] [55].…”

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confidence: 99%

Electrocoagulation Process in the Context of Disinfection Mechanism

Ghernaout¹,

Elboughdiri²

2020

OALib

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During the last three decades, the electrocoagulation (EC) process has known an exemplary renaissance in the field of water and wastewater treatment. Several researchers focused on applying this electrochemical technology in removing diverse pollutants such as pathogens. During EC method, the coagulant is furnished via solubilizing sacrificial electrodes upon an applied electric field. The easiness of the technology and the side phenomena involving the generation of gas bubbles are the major advantages. This work discusses briefly the main achievements and mechanisms in employing EC in disinfecting water. In the EC process, the microbes may be demobilized thanks to the direct adsorption on the surface of the anode pursued by electron transfer, and physical elimination through floating pathogens with formed hydrogen gas and/or precipitating with the produced flocs. Integrating EC with free radical assisted processes (e.g., electrooxidation), magnetic field and/or ultrasonic field remains an encouraging method to promote its implantation at full scale. Membrane processes should be considered as safe barriers towards disinfection by-products and hydroxyl radicals.

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Treatment of Residential Complexes’ Wastewater using Environmentally Friendly Technology

Cited by 74 publications

References 12 publications

Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

Statistical modelling of turbidity removal applied to non-toxic natural coagulants in water treatment: a case study

Electrocoagulation Process in the Context of Disinfection Mechanism

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