Excess sludge disruption and pollutant removal from tannery effluent by upgraded activated sludge system

Sodhi, Vijay; Bansal, Ajay; Jha, Mithilesh Kumar

doi:10.1016/j.biortech.2018.04.118

Cited by 31 publications

(2 citation statements)

References 44 publications

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“…Furthermore, sludges, the byproducts of wastewater treatment, comprise a mix of organic and inorganic substances, demanding meticulous disposal to minimize environmental repercussions [37,43]. In summation, the intricate waste landscape of the leather industry emphasizes the imperative for eco-friendly practices and forward-thinking waste management approaches.…”

Section: Solid Waste Tannery Residuesmentioning

confidence: 99%

Exploring Tannery Solid Wastes as a Source of Animal Feed

Flores Tapia,

Brito Moina

2023

Processes

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This review delves into the processing of tannery solid waste, emphasizing fleshings and chromium-tanned leather waste. This paper centers on fat recovery, chromium elimination, and protein preservation, aiming to make them apt for animal consumption. This paper also assesses the potential of introducing such recycled products to the global market. Drawing on the literature from the past two decades, sourced comprehensively from Scopus and Web of Science, 36 articles were selected because of their significant contributions from leather production powerhouses such as India and Brazil. Fleshings have shown immense potential as animal feed, and the extraction of tallow and collagen from rawhide trimmings yields up to 98% and 93%, respectively. Fermented tannery fleshings, notably with Enterococcus faecium HAB01, also demonstrate strong antioxidant capabilities. The overarching consensus emphasizes the need for rigorous purification when dealing with chromium-containing wastes, addressing concerns tied to Cr (III) and Cr (VI). Furthermore, raw tannery fleshings stand out as a sustainable, cost-effective, and globally marketable solution for animal feed production.

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Section: Solid Waste Tannery Residuesmentioning

confidence: 99%

Exploring Tannery Solid Wastes as a Source of Animal Feed

Flores Tapia,

Brito Moina

2023

Processes

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“…Technologies such as up-flow anaerobic sludge blanket reactors (UASBs), membrane bioreactors, non-aerated biofilm, and packed bed reactor were thereby exploited for denitrification, dephosphorization, anammox, detoxification, and bio-gas production through cultivation of tolerant microbial species, despite the fact that TWW generally has an inhibition effect on enzymatic reactions for anaerobic digestion [63][64][65][66][67][68]. Combined oxicanoxic biological treatments or facultative ponds were also developed for a better and multi-target pollutants removal, where the optimization of oxic-anoxic treatment process's configuration played an important role for full scale application [60,[69][70][71].…”

Section: Biological Treatmentmentioning

confidence: 99%

Tannery wastewater treatment: conventional and promising processes, an updated 20-year review

Jun

Tang

et al. 2022

J Leather Sci Eng

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Mismanagement of various wastes especially waste water produced by tanning processes has caused serious environmental problems and ultimately impaired human health. Constant efforts have been making to alleviate the pollution of tannery wastewater (TWW), yet terminal treatment still takes dominance. In this review, research on TWW treatment from 2000 to 2021 was summarized, and main methods such as coagulation and flocculation, adsorption, biological treatment, membrane filtration, advanced oxidation process were briefly discussed. More detailed introduction was given to the method of electrochemical treatment since it has excellent performance such as environmental friendliness and high efficiency, hence attracting more and more research attention in recent years. In view of the harsh physi-chemical conditions of TWW, integrated or combined treatment methods are accordingly recommended with better performance and multi-function, however comprehensive studies on optimization of methods combination and cost-effectiveness are needed. The certain issues that the residue Cr in treatment sludge and high salinity in effluent still remain were put forward in this work and potential solutions were provided. Moreover, this review proposed the perspective that realizing multi-function, recycling, and intensification should be the developing direction for future TWW treatment. This review is expected to provide a general guide for researchers who aspire to ameliorate TWW pollution problems and understand various methods utilized in this field. Graphical abstract

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Activated sludge and other aerobic suspended culture processes

Ouyang

Zhang

et al. 2019

Water Environment Research

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The fields in the process model of activated sludge, the characteristics and species of microbial communities, dynamics and mechanism in the process, the influence of different xenobiotics on activated sludge, anaerobic digestion on waste activated sludge, and design and operation for activated sludge are reviewed in 2018. Contrast with the past reviews, several new highlights such as waste activated sludge treatment, antibiotic and heavy‐metal xenobiotic, and pretreatment for anaerobic digestion are mentioned in 2018, which indicated that the research tendency of activated sludge from wastewater treatment to waste sludge treatment in the retrieved literature is developing.Practitioner pointsNone.

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Excess sludge disruption and pollutant removal from tannery effluent by upgraded activated sludge system

Cited by 31 publications

References 44 publications

Exploring Tannery Solid Wastes as a Source of Animal Feed

Exploring Tannery Solid Wastes as a Source of Animal Feed

Tannery wastewater treatment: conventional and promising processes, an updated 20-year review

Activated sludge and other aerobic suspended culture processes

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