H.E.A.T. A new sustainable green solution for treating and evaporating hide brind wastewater / Russell H. Vreeland in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 2 (02/2022)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 2 (02/2022) . - p. 62-70 Titre : H.E.A.T. A new sustainable green solution for treating and evaporating hide brind wastewater Type de document : texte imprimé Auteurs : Russell H. Vreeland, Auteur ; Long John, Auteur Année de publication : 2022 Article en page(s) : p. 62-70 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bain de saumure Demande biochimique en oxygène Diversité bactérienne Eaux usées -- Stations de traitements Evaporation -- Mesure Lagunage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Salt curing of hides releases a significant amount of excess water that must be disposed. In larger abattoirs this can result in production of tens of thousands of gallons of saturated salt brine that is also contaminated with biological material from the hides. These brines are often stored in enclosed impoundments that ultimately fill and need replacement, or the facility must build multiple impoundments. The proprietary, biologically based, sustainable Halophilic Evaporative Applications Technology (H.E.A.T.) process has been developed as a method to accelerate the evaporation of salt saturated brines. The process has been tested for 18 months in a full-scale lagoon located at an operating American beef plant. The process successfully evaporated an additional 31.99 inches of brine (866,900 gal) acre-1 of concentrated hide brine in one year, nearly drying out the South lagoon. Ambient evaporation of the same brine in an identical control lagoon at the site was only 19.19 inches (520,000 gallons) acre-1 representing a 1.66x increase in brine evaporation from the H.E.A.T. microbes. During 2020, the plant produced 3,376,000 gallons of brine, meaning H.E.A.T. evaporated 100.4 % of plant production in one lagoon in its first year. This was accomplished without additional infrastructure, equipment or external heating. During this test, Biochemical Oxygen Demand in the lagoons decreased over 98% with concomitant odor reduction. Beginning in October 2020, the lagoon began receiving all brine produced daily by the plant. This continued over the winter period, during which time the process evaporated over 34% of the inflow. Continued fertilization and microbial augmentation are essential for the continued healthy development of the system. Overall, the process and its essential microbial populations were stimulated by continuing inflow of fresh hide brines. The microbial process increases brine evaporation of concentrated salt brines, reduces odors and represents a new environmentally friendly mechanism for solving an industrial problem that has long plagued hide producers. Note de contenu : - MATERIALS AND METHODS : Purpose of the project - Hide lagoons - Evaporation measurement - Bacterial populations - Biochemical Oxygen Demand (BOD) - Loss on ignition - RESULTS : Evaporation - Bacterial populations - Biochemical Oxygen Demand (BOD) - Loss on ignition - Discussion - Table 1 : Evaporation in treated south lagoon over first 9 months of 2020 - Table 2 : Evaporation in untreated north lagoon over first 9 months of 2020 - Table 3 : South lagoon responses with all produced hide waste brines being added daily to the single lagoon. Some columns may not add up due to rounding errors while converting to decimal equivalents to reduce the size of the table. The full numbers are shown in the supplementary data files DOI : https://doi.org/10.34314/jalca.v117i2.4730 En ligne : https://drive.google.com/file/d/1ZOJeNqnBCVZ9Vd9XRKJt8oJvVoPDKsU4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37167 [article]

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