کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6466665 1422965 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel membrane-based integrated process for fractionation and reclamation of dairy wastewater
ترجمه فارسی عنوان
یک فرایند یکپارچه مبتنی بر غشای جدید برای تجزیه و احیاء فاضلاب لبنی است
کلمات کلیدی
بازیافت پساب، دفع مجدد، فوران غشاء، نانوفیلتراسیون، ادغام فرآیند، تخمیر اسید لاکتیک،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- An integrated process recycles water, caseins, whey proteins and lactose.
- This process can mitigate the sludge/retentate disposal and membrane fouling.
- IP-UF pretreatment greatly reduces fouling and concentration polarization of NF.
- NF retentate with concentrated lactose is obtained with IP-UF pretreatment.
- Fermentation fed by NF retentate with IP-UF pretreatment produces more LA.

An integrated isoelectric precipitation (IP) - ultrafiltration (UF) - nanofiltration (NF) - lactic acid (LA) fermentation process was established for recovering water, proteins, cells and LA from model dairy wastewater (MDW). This process could solve the problems of sludge/retentate disposal and membrane fouling during membrane-based wastewater treatment. The IP process greatly retarded concentration polarization and fouling of UF. However, PES membrane was still severely fouled by whey proteins. XPS results showed that carboxyl groups (CO) belonging to the proteins was on PES10 surface, but it was not found on Ultracel PLGC membrane. Proteins in MDW with IP were completely retained by Ultracel PLGC UF membrane and lactose almost passed through. After IP-UF pretreatment, the fouling of NF membrane was greatly retarded (irreversible fouling decreased from 44.4% to 11.1% in a pilot-plant test). Thus, the volume reduction ratio was highly increased to 37 and the retentate with high strength lactose of 44.2 g L−1 was obtained. With a model NF retentate (45.0 g L−1 of lactose) without proteins, 5.42 g L−1 of cell mass and 37.6 g L−1 of LA concentration were produced by the LA producer B. coagulans IPE22.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 313, 1 April 2017, Pages 1061-1070
نویسندگان
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