Ossein wastewater characterization and treatability study

Badrinath, S. D.; Kaul, S. N.; Deshpande, V. P.; Gadkari, S. K.

doi:10.1016/0043-1354(91)90123-8

Cited by 9 publications

(7 citation statements)

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“…Batch and continuous laboratory activated sludge systems were employed to study the treatment of wastewater from an ossein plant. 163 Operating data from a full-scale plant designed according to results from the laboratory study were reported.…”

Section: Industrial Wastesmentioning

confidence: 99%

Activated sludge

Aitken¹,

Heck²,

Mines³

et al. 1992

Water Environment Research

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PROCESS MODELING AND KINETICSMechanistic approaches. A procedure was developed to obtain stoichiometric and kinetic parameters for heterotrophic growth and hydrolysis of slowly degradable organic matter in the activated sludge process. I The procedure was based on oxygen-uptake measurements to distinguish between organic fractions in domestic wastewater. The influence ofparticle size on biological treatability of particulate matter and on treatment process kinetics was investigated," Pretreatment to modify particle-size distribution was discussed in relation to its effect on process performance. Hydrolysis of particulate organic substrate was found to be highly influenced by the electron donor available. 3 Using raw municipal wastewater as a substrate, the hydrolysis rate was high under aerobic conditions, medium under anaerobic conditions, and low under anoxic conditions. Hydrolysis ofa( 1-4) glucan bonds in macromolecular carbohydrates found in municipal wastewater was seen to be controlled by concentrations ofoxygen and/or alternate electron acceptors and was suppressed in the presence of high concentrations of soluble substrate." The extracellular enzymes responsible for carbohydrate hydrolysis were associated with the particulate fraction. Under denitrifying conditions, slowly biodegradable chemical oxygen demand (COD) was hydrolyzed more rapidly in biological phosphorusremoval systems incorporating nitrification and denitrification than in conventional nitrification/denitrification systems." The increased rate of hydrolysis in the biological phosphorus-removal system was proposed to result from the presence ofan anaerobic reactor. Measurement of dehydrogenase activity indicated that activated sludge microorganisms metabolized adsorbed substrate in the absence of significant oxygen uptake."Sykes" formulated a product-maintenance model of the activated sludge process. A cited advantage to this approach was that empirical observations were described better than with conventional kinetic models. Formation of soluble microbial products in batch reactors was studied using radiolabeled phenol and glucose." Zero-and first-order kinetic expressions adequately described the disappearance ofinitial substrate and net formation of soluble microbial products. For organisms subjected to anaerobic conditions before substrate and oxygen supply in batch systems, the observed biomass yield decreased as initial substrate to biomass concentration (So/X o) increased." A proposed explanation for this phenomenon was that the organisms needed to rebuild energy reserves at the expense of growth. In a study using synthetic wastewater, the existence ofsynchronized cell division was reported to occur in laboratory-activated sludge systems. 10 Synchronization was related to starvation ofthe organisms under anaerobic conditions in batch culture and occurred at So/X o greater than two. A model was proposed to describe the rate and extent of cometabolic transformation of halogenated aliphatic compounds by resting microbial cells.II The mod...

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Section: Industrial Wastesmentioning

confidence: 99%

Activated sludge

Aitken¹,

Heck²,

Mines³

et al. 1992

Water Environment Research

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“…The GWW could be alkaline or acidic based on the manufacturing process and the utilized raw materials [9]. GWW is greasy and fibrous containing bovine bone pieces and hairs, resulting in high quantities of particulate organic matters [11,12]. The particulates mainly consist of animal crushed acidic based on the manufacturing process and the utilized raw materials [9].…”

Section: Introductionmentioning

confidence: 99%

“…The particulates mainly consist of animal crushed acidic based on the manufacturing process and the utilized raw materials [9]. GW greasy and fibrous containing bovine bone pieces and hairs, resulting in high quan of particulate organic matters [11,12]. The particulates mainly consist of animal cru bones, skin, and hair, which is highly obnoxious [9].…”

Section: Introductionmentioning

confidence: 99%

“…The discharge of such wastew into sewerage networks or water streams causes severe pollution problems for drin water [13][14][15]. This wastewater should be treated prior to discharging it into environment due to its negative impact on the water streams [12,16,17]. How simultaneous treatment and biofuels production from GWW save energy and chem and produces less excess sludge [18].…”

Section: Introductionmentioning

confidence: 99%

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Recent Approaches for the Production of High Value-Added Biofuels from Gelatinous Wastewater

et al. 2021

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Gelatin production is the most industry polluting process where huge amounts of raw organic materials and chemicals (HCl, NaOH, Ca2+) are utilized in the manufacturing accompanied by voluminous quantities of end-pipe effluent. The gelatinous wastewater (GWW) contains a large fraction of protein and lipids with biodegradability (BOD/COD ratio) exceeding 0.6. Thus, it represents a promising low-cost substrate for the generation of biofuels, i.e., H2 and CH4, by the anaerobic digestion process. This review comprehensively describes the anaerobic technologies employed for simultaneous treatment and energy recovery from GWW. The emphasis was afforded on factors affecting the biofuels productivity from anaerobic digestion of GWW, i.e., protein concentration, organic loading rate (OLR), hydraulic retention time (HRT), the substrate to inoculum (S0/X0) ratio, type of mixed culture anaerobes, carbohydrates concentration, volatile fatty acids (VFAs), ammonia and alkalinity/VFA ratio, and reactor configurations. Economic values and future perspectives that require more attention are also outlined to facilitate further advancement and achieve practicality in this domain.

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“…The process of gelatin production generates a large amount of effluent, approximately 300 m 3 of waste water for every ton of bones processed with a concentration of chemical oxygen demand (COD) of an average 8000 mg/L, and it is rich in nitrogen, calcium, and phosphorus (Hoyos et al., 2002; Lakshmi Kruthika et al., 2013); therefore, the effluent elimination is an important cost factor (Maree et al., 1990). Effluent treatment in this type of industry includes a pretreatment that consists of the elimination of coarse solids, a primary treatment that includes unit operations of neutralization, flocculation and coagulation followed by clarification, sedimentation or floating, and finally a secondary aerobic biological treatment (Badrinath et al., 1991).…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation

Arturi

Seijas

Bianchi

2019

Heliyon

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Effluents from gelatin production plants are highly complex and difficult to treat by conventional methods. The Electrocoagulation (EC) technique was evaluated to treat effluents that contain a heavy load of Chemical Oxygen Demand (COD) and a large quantity of suspended solids. This paper presents results of laboratory scale studies that compare the performance of Chemical Coagulation (CC) with aluminum salts and EC with aluminum electrodes. The heavy organic load and suspended solids in this kind of wastewater lead to low performance in the secondary treatment. SEM-EDS were used to analyze the sludge formed in the EC process and the removal mechanism of pollutants from the wastewater. The structure and composition of the precipitates at different operation conditions, such as pH, show that EC has increased efficiency of COD removal, compared to CC with the same dose of aluminum (Al +3 ) as coagulant. The efficiency of COD removal was 73.6% with EC and 55.6% with CC. The in-situ formation of zeolites in the EC process explains the high efficiency of this treatment compared to the CC process. The zeolite formation during the EC process in the wastewater of the gelatin production plant has not been reported until now.

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Ossein wastewater characterization and treatability study

Cited by 9 publications

References 0 publications

Activated sludge

Activated sludge

Recent Approaches for the Production of High Value-Added Biofuels from Gelatinous Wastewater

A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation

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