Reduction of Alkali Supplement in a Pilot-Scale Thermophilic Multi-Staged UASB Reactor Treating Alcohol Distillery Wastewater
Author(s):
Abstract:
One of the main disadvantages of anaerobic wastewater treatment at a low pH is the significant operational cost due to the addition of necessary alkali. To reduce alkali supplement and thus the cost, this study proposes a sequential multi-feed (SqMF) mode (distributed feeding) and effluent recycle (ER) mode. Experiments were conducted with a pilot-scale (2.5 m3) thermophilic (55°C) multi-staged up-flow anaerobic sludge blanket reactor. Alcohol distillery wastewater (shochu), a major source of industrial wastewater in Japan, was used for the study. The SqMF mode of operation (influent pH: 5.0; organic loading rate: 45 kgCOD/m3/day; HRT: 12 hours; influent COD concentration: 20,900 mgCOD/L) successfully reduced the alkali supplement (24% NaOH solution) requirement by 67.2% compared with the single-feed mode. For the ER mode operation (organic loading rate: 35 kgCOD/m3/day; HRT: 12 hours; influent COD concentration: 17,400 mgCOD/L), operation was possible without any alkali supplement since the system uses the alkalinity generated during microbial metabolism.
Keywords:
Language:
English
Published:
International Journal Of Environmental Research, Volume:7 Issue: 4, Autumn 2013
Pages:
823 to 830
magiran.com/p1173081
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!