Characterization of Tannery Solid Wastes Based Fertilizers and Fish-Food

Chattopadhyay, Buddhadeb; Goswami, Abhishek; Aich, Anulipi; Datta, Sibnarayan; Mukhopadhyay, Sajal

doi:10.5276/jswtm.2011.253

Cited by 3 publications

(7 citation statements)

References 3 publications

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“…On the other hand, determined total energy of CSW (3515.33 cal/g) is tended to be lower than those found by Muralidhara et al (1982), Chattopadhyay et al (2011) andForero-Núñez et al (2015). That might be due to the very low content of fat of CSW in this study.…”

Section: Chrome Shaving Waste Characteristicscontrasting

confidence: 70%

Treating Leather Shaving Waste to Decrease Its Environmental Impact

Nasr

Gaber

Ali

et al. 2018

Egyptian Journal of Desert Research

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hrome shaving waste (CSW) is one of the largest leather tanning wastes, caused an economical and environmental loss if it did not utilize properly. This study aims to extract chromium from chrome shaving waste, by alkaline hydrolysis or incineration in order to reuse it in leather tanning. Sodium hydroxide and carbonate were used in chemical hydrolysis and compared with incineration method in chrome yielding. Twenty five sheep pelts were tanned with recovered and commercial chromium 33% basicity to compare their effects in tanning. The results showed that among alkaline treatments, caustic soda was more effective than sodium carbonate in extraction, but incineration method was the best extraction method because of its high extraction yield (99.37%). Using sugar as a reducing agent was better than sodium sulphite to prepare tanning liquor. It increased chrome yield and produced chromium sulphate 33% basicity, which are more suitable for leather tanning. Most physical and chemical properties, except fat and ash contents, were similar in leathers tanned with recovered chrome and those tanned with commercial chrome. Thus, all studied tanned leathers were suitable for using in leather manufacturing.

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Section: Chrome Shaving Waste Characteristicscontrasting

confidence: 70%

Treating Leather Shaving Waste to Decrease Its Environmental Impact

Nasr

Gaber

Ali

et al. 2018

Egyptian Journal of Desert Research

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Section: Assessmentmentioning

confidence: 99%

“… Fleshing: mechanical removal of excess flesh and fat (hypodermis) adhered to the hide. The material obtained by removing meat residues and connective subcutaneous tissues from the flesh side of the skin before further processing is considered one of the most important by‐products from the leather industry and accounts for about 10–15% of the animal skin (Corte et al., 2014 ) and up to 30% of the solid waste (Chattopadhyay et al., 2011 ). To ensure even thickness, excess material from the flesh side of the hide is removed (shaving).…”

Section: Assessmentmentioning

confidence: 99%

“…(2007), Chattopadhyay et al. (2011), Valeika et al. (2012), FAO (1996), Biosecurity New Zealand (2007) and ENEA (2020), it commonly includes: Trimming: mechanical removal of unwanted parts. Soaking: re‐hydration and washing to remove substances like dirt, blood and salt (a bactericide can be added). Fleshing: mechanical removal of excess flesh and fat (hypodermis) adhered to the hide.…”

Section: Assessmentmentioning

confidence: 99%

See 1 more Smart Citation

Inactivation of indicator microorganisms and biological hazards by standard and/or alternative processing methods in Category 2 and 3 animal by‐products and derived products to be used as organic fertilisers and/or soil improvers

Koutsoumanis¹,

Allende²,

Bolton³

et al. 2021

EFS2

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The European Commission requested EFSA to assess if different thermal processes achieve a 5 log 10 reduction in Enterococcus faecalis or Salmonella Senftenberg (775W) and (if relevant) a 3 log 10 reduction in thermoresistant viruses (e.g. Parvovirus ) as well as if different chemical processes achieve a 3 log 10 reduction of eggs of Ascaris sp., in eight groups of Category 2 and 3 derived products and animal by‐products (ABP). These included (1) ash derived from incineration, co‐incineration and combustion; (2) glycerine derived from the production of biodiesel and renewable fuels; (3) other materials derived from the production of biodiesel and renewable fuels; (4) hides and skins; (5) wool and hair; (6) feathers and down; (7) pig bristles; and (8) horns, horn products, hooves and hoof products. Data on the presence of viral hazards and on thermal and chemical inactivation of the targeted indicator microorganisms and biological hazards under relevant processing conditions were extracted via extensive literature searches. The evidence was assessed via expert knowledge elicitation. The certainty that the required log 10 reductions in the most resistant indicator microorganisms or biological hazards will be achieved for each of the eight groups of materials mentioned above by the thermal and/or chemical processes was (1) 99–100% for the two processes assessed; (2) 98–100% in Category 2 ABP, at least 90–99% in Category 3 ABP; (3) 90–99% in Category 2 ABP; at least 66–90% in Category 3 ABP; (4) 10–66% and 33–66%; (5) 1–33% and 10–50%; (6) 66–90%; (7) 33–66% and 50–95%; (8) 66–95%, respectively. Data generation on the occurrence and reduction of biological hazards by thermal and/or chemical methods in these materials and on the characterisation of the usage pathways of ABP as organic fertilisers/soil improvers is recommended.

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“…Although, in theory, there are many chemicals that can be used as tanning agents, in practice, only trivalent chromium complexes have been successfully employed. Nowadays, chrome-tanned leather has accounted for 90% of total leather production (Chattopadhyay et al, 2012). However, although chrome tanning agent is effective, it has disadvantages, namely a low reaction efficiency and a low adsorption rate on collagen fibers (Zhou et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of graphene oxide–methacrylic acid–sodium allyl sulfonate copolymer and its tanning properties

Zhou

Cui

et al. 2019

Arabian Journal of Chemistry

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Graphite oxide nanosheets (GONs) and the copolymer of GONs with methacrylic acid (MAA) and sodium allyl sulfonate (SAS) (poly(GON-MAA-SAS)) were prepared. The GONs in poly(GON-MAA-SAS) are smaller and uniformly dispersed, allowing them to penetrate into collagen fibers of leather and produce better tanning effects than current nano-tanning agents. Tanning effects due to chemical bonding and nanoeffects are elucidated by measuring the shrinkage temperature (T s ) of wet and dry leather. The results indicate that poly(GON-MAA-SAS) could be used alone as a tanning agent to provide excellent mechanical properties, especially good elasticity and softness, although the T s is slightly lower than that of chrome-tanned leather. Poly(GON-MAA-SAS) in combination with a chrome tanning agent could allow the dosage of the latter to be halved. These results indicate the potential for new nano-tanning agents to reduce the pollution caused by tanning agents. ª 2015 Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Characterization of Tannery Solid Wastes Based Fertilizers and Fish-Food

Cited by 3 publications

References 3 publications

Treating Leather Shaving Waste to Decrease Its Environmental Impact

Treating Leather Shaving Waste to Decrease Its Environmental Impact

Inactivation of indicator microorganisms and biological hazards by standard and/or alternative processing methods in Category 2 and 3 animal by‐products and derived products to be used as organic fertilisers and/or soil improvers

Synthesis of graphene oxide–methacrylic acid–sodium allyl sulfonate copolymer and its tanning properties

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