Nitrogen and cod removal from tannery wastewater using biological and physicochemical treatments

Pire-Sierra, María Carolina; Cegarra-Badell, Diana Dielui; Carrasquero, Sedolfo; Angulo-Cubillan, Nancy Elena; Díaz-Montiel, Altamira Rosa

doi:10.17533/udea.redin.n80a08

Cited by 9 publications

(6 citation statements)

References 32 publications

(56 reference statements)

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“…The most effective coagulant dose for eliminating physicochemical parameters was 150mgL/l at a pH close to neutral, and each additional coagulant beyond this level worsens the pollution in the treatment system [58]. Pire-Sierra et al [59] integrated flocculation and coagulation treatment systems in a sequencing batch reactor (SBR) for TWW and discovered that 80 %, 82%, and 99.6% of Chemical Oxygen Demand, TN, and NH4-N were eliminated, respectively [59].…”

Section: Coagulationmentioning

confidence: 99%

Overview of treatment methods of tannery wastewater

Husain,

Ansari,

Khan

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Poor waste management, particularly the wastewater from tanning procedures, has led to significant environmental issues and eventually harmed human health. Most tanneries still use traditional production techniques and release toxic heavy metals into the sewage system without properly treating it. In this regard, chromium (Cr) present in the effluent from tanneries is one of the toxins that are carcinogenic, mutagenic, and teratogenic. This review paper summarized the research conducted on tannery effluent treatments by briefly covering the techniques for treating Cr metal and its removal efficiency. Further, future aspects and proposals have also discussed. Researchers have used various treatment methods such as activated sludge, chemical precipitation, coagulation, coagulation-aided sedimentation, membrane filtration and AOP (Advanced oxidation process). A review of the literature showed that the level of hazardous Cr has been significantly reduced to low amounts by using several physico-chemical treatment methods. This review paper will be helpful to practising engineers in the selection of proper methods for treating tannery effluent and researchers in conducting their future studies.

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Section: Coagulationmentioning

confidence: 99%

Overview of treatment methods of tannery wastewater

Husain,

Ansari,

Khan

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Different enterobacteria have been reported for the biotreatment of tannery wastewater, Enterobacter sp. [ 54 ], Serratia marcescens [ 147 ] and E. coli [ 148 ]; they have the ability to remove up to 63% COD and up to 54% Cr. The groups of nitrifying bacteria [ 149 ] and denitrifying bacteria [ 150 ] have also been reported in the treatment of these effluents, reaching removal percentages of 80% COD and 64.4% Cr and 98.3% COD and 88.5% Cr, respectively.…”

Section: Technologies For the Treatment Of Tannery Wastewatermentioning

confidence: 99%

Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

2021

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The tannery industry is one of the economic sectors that contributes to the development of different countries. Globally, Europe and Asia are the main producers of this industry, although Latin America and Africa have been growing considerably in recent years. With this growth, the negative environmental impacts towards different ecosystem resources as a result of the discharges of recalcitrated pollutants, have led to different investigations to generate alternative solutions. Worldwide, different technologies have been studied to address this problem, biological and physicochemical processes have been widely studied, presenting drawbacks with some recalcitrant compounds. This review provides a context on the different existing technologies for the treatment of tannery wastewater, analyzing the physicochemical composition of this liquid waste, the impact it generates on human health and ecosystems and the advances in the different existing technologies, focusing on advanced oxidation processes and the use of microalgae. The coupling of advanced oxidation processes with biological processes, mainly microalgae, is seen as a viable biotechnological strategy, not only for the removal of pollutants, but also to obtain value-added products with potential use in the biorefining of the biomass.

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“…Pre-denitrification prior to nitrification, using organic carbon in raw wastewater efficiently for nitrogen removal, can decrease the production of sludge and lower operating cost. Pre-denitrification is the most efficient strategy for simultaneous removal of nitrogen and organic matter from tannery wastewater (Seyoum et al 2004a;Ganesh et al 2014;Wu et al 2014;Pire-Sierra et al 2016). The anaerobic digester and aerobic reactor components of the integrated system remove nitrogen through the pre-denitrification process.…”

Section: Efficiency Of Nitrogen Removalmentioning

confidence: 99%

Nitrogen removal in integrated anaerobic–aerobic sequencing batch reactors and constructed wetland system: a field experimental study

et al. 2019

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A study was conducted to assess the performance of an integrated system consisting of an anaerobic digester (AD), an aerobic sequence batch reactor (ASBR), and three horizontal subsurface flow constructed wetlands (HSSFCWs) vegetated with the perennial grass Phragmites karka for removal of nitrogen in tannery wastewater. Nine grab wastewater samples were collected weekly between September and December 2016 from the influent and effluent at each unit of operation of the plant and analyzed for physicochemical parameters. The AD removed 67% of oxidized nitrogen (NO X -N); the removal was improved to 76% in the ASBR with a further aeration period in the HSSFCWs, and the NO X -N removal efficiency improved progressively to 96%. The removal efficiency for nitrate (NO 3 -N) was 82% and for nitrite (NO 2 -N) 88%; for ammonium (NH 4 -N) removal efficiency was 77% higher in the HSSFCWs compared to the AD and the ASBR. Despite the considerable percentage of NO 3 -N removed, in the effluent was above the country's permissible limit (39.3 mg/l). The high concentration might be due to a weaker denitrification process in HSSFCWs caused by lack of carbon and external organic sources in the wastewater sufficient to carry out the process. The results suggest that the addition of supplementing carbon sources (methanol, sugars, or volatile fatty acids) to the effluent would achieve better performance. Based on these findings, the application of combined anaerobic/aerobic system connected with constructed wetlands process allows the achievement of higher efficiency in removing nitrogen compared to the use of an anaerobic, aerobic, or constructed wetland system along.

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Nitrogen and cod removal from tannery wastewater using biological and physicochemical treatments

Cited by 9 publications

References 32 publications

Overview of treatment methods of tannery wastewater

Overview of treatment methods of tannery wastewater

Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

Nitrogen removal in integrated anaerobic–aerobic sequencing batch reactors and constructed wetland system: a field experimental study

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