Three-Stage Biological System for Treatment of Coke Oven Effluent

Maneesh, N.; Bhuvanesh, S.; Shaikh, Z.A.; Sreekrishnan, T.R.; Mazumdar, Siddharth; Choubey, Mukteshwar

doi:10.1061/(asce)hz.2153-5515.0000392

Cited by 8 publications

(2 citation statements)

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“…Placing anaerobic process in the first step improves biodegradability and helps in the removal of some inhibitory compounds, ensuring better performance in the subsequent stages (Wang et al 2011;Zhou et al 2013;Huang et al 2016). In one study, the use of a hybrid anoxic reactor with completely mixed aeration tanks utilizing granular biomass under fluidized conditions resulted in the removal of 88% of ammoniacal nitrogen, 90% COD, and almost 99 and 100% for cyanide and phenol (Maneesh et al 2018). Similarly, a hybrid anaerobic reactor showed more tolerance towards cyanide, providing knowledge on the development of efficient systems (Gupta et al 2018).…”

Section: Biological Treatmentmentioning

confidence: 99%

Advances in treatment of coking wastewater – a state of art review

Tamang

Paul

2021

Water Science and Technology

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Coking wastewater poses a serious threat to the environment due to the presence of a wide spectrum of refractory substances such as phenolic compounds, polycyclic aromatic hydrocarbons and heterocyclic nitrogenous compounds. These toxic substances are difficult to treat using conventional treatment methods alone. In recent years much attention has been given to the effective treatment of coking wastewater. Thus, this review seeks to provide a brief overview of recent developments that have taken place in the treatment of coking wastewater. In addition, this article addresses the complexity and the problems associated with treatment followed by a discussion on biological methods with special focus on bioaugmentation. As coking wastewater is refractory in nature, some of the studies have been related to improving the biodegradability of wastewater. The final section focuses on the integrated treatment methods that have emerged as the best solution for tackling the highly unmanageable coking wastewater. Attention has also been given to emerging microwave technology which has tremendous potential for treatment of coking wastewater.

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Section: Biological Treatmentmentioning

confidence: 99%

Advances in treatment of coking wastewater – a state of art review

Tamang

Paul

2021

Water Science and Technology

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“…Activated sludge is responsible for the process of nitrification and denitrification [10,11]. The carbon source used by activated sludge microorganisms is phenol and its derivatives present in the wastewater.…”

Section: Introductionmentioning

confidence: 99%

Low- and High-Pressure Membrane Separation in the Production of Process Water for Coke Quenching

2021

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Although the time for operating mines and coking plants in many countries is coming to an end due to climate change, we must still ensure that the pollution generated by this source of the economy is minimized. Despite the several stages of treatment of the coke-oven effluent, completed with nitrification and denitrification processes preceding final sedimentation, the stream obtained does not meet the requirements of water for coke quenching. That is why the stream after biodegradation and sedimentation was treated on membrane units to ensure water reusing in the coking plant. As the subjected stream contained both solid and dissolved pollutants, a two-stage system was proposed: low- and high-pressure membrane filtration. Industrial modules were tested on pilot units operating under industrial plant conditions. In the case of the ultrafiltration process, all the tested ultrafiltration modules fulfilled the primary task. All of them separated almost completely the turbidities present in the stream, which would have disturbed the operation of the high-pressure plant. Considering the decrease in permeate flux and the possibility of cleaning, a PCI membrane made of PVDF tubes with a diameter of 12.5 mm and pore size of 20 μm was selected. Regarding the high-pressure membrane filtration, the reverse osmosis membrane was significantly better in the removal efficiency of both organic and inorganic dissolved substances. An operating pressure of 3 MPa was chosen for the system. Hence, membrane processes, which are not used as stand-alone treatment units for coke-oven effluents, function well as a final treatment stage.

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