Wastewater treatment for production of H<sub>2</sub>S‐free biogas

Ahammad, Sk. Ziauddin; Gomes, James; Sreekrishnan, T.R.

doi:10.1002/jctb.1927

Cited by 62 publications

(18 citation statements)

References 11 publications

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“…Hydrogen sulfide (H 2 S) in biogas is also undesirable, as it is a very toxic and corrosive gas. Physical and chemical processes used for removal of H 2 S from biogas are very expensive (Ahammad et al, 2008). The common VSCs detected in sludge are hydrogen sulfide (H 2 S), methyl mercaptan or methanethiol (MT), dimethyl sulfide (DMS), and dimethyl disulfide (DMDS) (ASCE, 1995).…”

Section: Introductionmentioning

confidence: 99%

Pretreatment of municipal waste activated sludge for volatile sulfur compounds control in anaerobic digestion

Dhar

Youssef

Nakhla

et al. 2011

Bioresource Technology

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Section: Introductionmentioning

confidence: 99%

Pretreatment of municipal waste activated sludge for volatile sulfur compounds control in anaerobic digestion

Dhar

Youssef

Nakhla

et al. 2011

Bioresource Technology

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“…The limitations of the traditional methods such as adsorption and filtration for the wastewater treatment are their insufficiency to meet the water treatment standards. Other limitations are the production of a large sludge amount, low capacity rates, transportation requirements, and the dangers associated with harmful chemical reactants [41,39].…”

Section: Physicochemical Treatment Processesmentioning

confidence: 99%

A Review on Electrochemical Degradation and Biopolymer Adsorption Treatments for Toxic Compounds in Pharmaceutical Effluents

et al. 2020

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Pharmaceutical industries generate very large quantities of toxic organic compounds which include volatile organic compounds (VOCs) and/or organic volatile impurities (OVIs). These toxic compounds, amongst which are emerging residual solvents, largely come from wastewater treatment plants (WWTPs) and are being continuously dumped into the environment at an alarming rate. Efficient treatment of pharmaceutical wastewaters (effluents) is currently a major challenge because of not only the enormous quantity to be disposed of but also its complexity, as well as its hazardous nature. Dumping these kinds of polluted wastes into the environment at uncontrolled rates are putting increasing pressure on freshwater ecosystems. This review paper focuses on combined electrochemical degradation and biopolymer adsorption treatment processes and techniques for toxic compounds in pharmaceutical wastewater treatment. These emerging processes such as the combination of electrochemical techniques as a primary treatment method, followed by an adsorption process, is now a topic of intense research as it is proving to very feasible, ecofriendly, and cost-effective in the complete recovery of toxic residual solvents from binary aquatic systems. This paper presents major toxic pollutants in pharmaceutical wastewaters and their fate in the aquatic environment, their sources, and origin in pharmaceutical industries. The evaluation of the traditional methods used for the removal of these emerging organic pollutants from aquatic matrices and pharmaceutical effluents is accomplished. New developments in electrochemical treatments for the remediation of toxic compounds in pharmaceutical wastewaters are also discussed.

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“…Hydrogen sulphide is also corrosive for the equipment (Dhar et al 2011) and should be physically or chemically removed from biogas. Removal of hydrogen sulphide by activated carbon, addition of iron salts or using oxidants is very expensive (Ahammad et al 2008;Lens et al 1998). When iron (Fe 3+ ) is used for the removal of hydrogen sulphide, it reacts with hydrogen sulphide and forms elemental sulphur, iron and hydrogen according to equation 1.4 (Wei and Osseo-Asare, 1996):…”

Section: Evaluation Of Digestion Process Efficiencymentioning

confidence: 99%

Research and evaluation of iron impact on sludge digestion process

Ofverstrom¹

2013

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The dissertation examines impact of iron salts and ochre (iron sludge from water treatment plant) on digestion of sludge mixture from wastewater treatment plants with biological phosphorus removal process. Research object was anaerobic digestion of sludge mixture with traditional and alternative iron sources added. The aim of work was to examine the potential of ochre as an alternative iron source and to investigate factors governing anaerobic digestion process: methane production rate, hydrogen sulphide removal process and reduction of internal phosphates recycling at wastewater treatment plants with biological treatment plants. Dissertation consists of introduction, three chapters, general conclusions and recommendations, references and list of author's publication on the topic of dissertation. In introduction main problem is discussed; topicality of work, object of research, aim and objectives of work are formulated, of the work are described; research methodology, scientific novelty of research, practical significance of results and defended propositions are presented. In the end of introduction author's articles, structure of dissertation and acknowledgements are presented. In the first chapter literature concerning with the studied topic is analysed. Information about sludge sources, types and characterisation, anaerobic digestion process and previous research on results on impact of aluminium and iron. In the end of chapter conclusions and tasks are reformulated. Second chapter presence methodologies used for the research. Laboratory and pilot-scale anaerobic reactors and characteristics of sludge and ochre used for the experiments are described. In third chapter results on impact of iron salts and ochre are presented and discussed, comparison with other researchers obtained results is made. Proposed technological scheme for use of ochre at the wastewater treatment plants with biological phosphorus removal presented and described. Ten articles have been published on the topic of thesis: two-in scientific journal referred in the other databases, two-in International Conference material, three-in Lithuanian Conference material. 12 presentations were made at the Republic and International Conferences and Seminars. vi Reziumė Disertacijoje nagrinėjama geležies druskų ir geležies paplavų (ochra) iš geriamo vandens paruošimo įrenginių įtaką dumblo pūdymo procesui. Tyrimo objektas-dumblo mišinio pūdymas, į jį įterpiant tradicinį arba alternatyvų geležies šaltinį. Pagrindinis disertacijos tikslas-ištirti geležies paplavų, kaip alternatyvaus geležies šaltinio, panaudojimo galimybes ir nustatyti faktorius, įtakojančius pūdymo proceso kokybę: metano susidarymą, sieros vandenilio pašalinimo procesą ir vidinės fosfatų recirkuliacijos sumažinimą nuotekų valymo įrenginiuose su biologiniu fosforo šalinimu. Disertaciją sudaro įvadas, trys skyriai, bendrosios išvados ir rekomendacijos, naudotos literatūros ir autoriaus publikacijų disertacijos tema sąrašas. Įvadiniame skyriuje aptariami tiriamoji problema ir darbo aktualuma...

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Wastewater treatment for production of H₂S‐free biogas

Cited by 62 publications

References 11 publications

Pretreatment of municipal waste activated sludge for volatile sulfur compounds control in anaerobic digestion

Pretreatment of municipal waste activated sludge for volatile sulfur compounds control in anaerobic digestion

A Review on Electrochemical Degradation and Biopolymer Adsorption Treatments for Toxic Compounds in Pharmaceutical Effluents

Research and evaluation of iron impact on sludge digestion process

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Wastewater treatment for production of H2S‐free biogas

Cited by 62 publications

References 11 publications

Pretreatment of municipal waste activated sludge for volatile sulfur compounds control in anaerobic digestion

Pretreatment of municipal waste activated sludge for volatile sulfur compounds control in anaerobic digestion

A Review on Electrochemical Degradation and Biopolymer Adsorption Treatments for Toxic Compounds in Pharmaceutical Effluents

Research and evaluation of iron impact on sludge digestion process

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Wastewater treatment for production of H₂S‐free biogas