|Table of Contents|

Treatment of Wastewater from Alcohol Fuel Production with Sweet Potato by Combined Process(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2010 05
Page:
730-733
Research Field:
T & M
Publishing date:

Info

Title:
Treatment of Wastewater from Alcohol Fuel Production with Sweet Potato by Combined Process
Author(s):
YANG JunshiZHOU HouzhenLI GuoxinXIAO YangLI Xudong
(1Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China)
(2PetroChina Southwest Oil & Gasfield Company, Nanchong Refining & Chemical Plant, Nanchong 637000, Sichuan, China)
Keywords:
combined process sweet potato fuel alcohol wastewater improved UASB SBBR composite flocculants
CLC:
X703.1
PACS:
DOI:
10.3724/SP.J.1145.2010.00730
DocumentCode:

Abstract:
A combined process, solid-liquid separation – anaerobic digestion with improved UASB (Up-flow Anaerobic Sludge Bed) – aerobic biological treatment with SBBR (Sequencing Batch Biofilm Reactor) – effective treatment with composite flocculants, which was used to treat wastewater from alcohol fuel production with sweet potato, was studied. It was found that some sensitive environmental pollutants, such as pH, COD, BOD, SS, colority, S2-, NH3-N and TP, could meet the first level requirements of the national integrated wastewater discharge standard (GB8978-1996). At (35±3) ℃, COD and SS in the influent ranged from 36 720~43 890 mg L-1 and 8 370~11 400 mg L-1, respectively, the organic load of the improved UASB were 28.86~34.5 g(COD) L-1 d-1. Removal rates of COD, SS and VFA were 92%~93%, 89%~91.5% and 96%~98%, too. In the range of 12~30 ℃, SS, BOD, NH3-N and S2- were degraded by two-stage SBBR from 360~530 mg L-1, 400~530 mg L-1, 120~163 mg L-1 and 40~50 mg L-1 to 40~60 mg L-1, 250~310 mg L-1, 7.2~13.8 mg L-1 and lower than 0.5 mg L-1, respectively. Of the three investigated flocculants, the effect of the effective composite flocculants was the best. Concentrations of COD, TP and colority in the effluent were lower than 100 mg L-1, 0.5 mg L-1 and 40 times, respectively. Fig 2, Tab 3, Ref 12

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Last Update: 2010-10-25