Enhancing anammox resistance to low operating temperatures with the use of PVA gel beads

2021 ◽  
Vol 774 ◽  
pp. 144826
Author(s):  
Jinxing Wang ◽  
Jidong Liang ◽  
Li Sun ◽  
Jianqing Shen ◽  
Zhen He
Keyword(s):  
Gel Beads ◽  
Operating Temperatures ◽  
Pva Gel

scholarly journals Treatment Capability and Microbial Community of Anammox Process Using PVA Gel Beads as Biomass Carriers

2011 ◽  
Vol 47 (4) ◽  
pp. 137-145
Author(s):  
ZHIGANG LI ◽  
DAISUKE HIRA ◽  
TAKAO FUJII ◽  
KENJI FURUKAWA
Keyword(s):  
Microbial Community ◽  
Gel Beads ◽  
Pva Gel ◽  
Anammox Process

Bench-scale study using PVA gel as a biocarrier in a UASB reactor treating corn steep liquor wastewater

2007 ◽  
Vol 56 (7) ◽  
pp. 65-71 ◽  
Author(s):  
W. Zhang ◽  
K. Furukawa ◽  
J.D. Rouse
Keyword(s):  
Volatile Fatty Acids ◽  
Corn Steep Liquor ◽  
Gas Production ◽  
Continuous Treatment ◽  
Uasb Reactor ◽  
Natural Occurrence ◽  
Granule Formation ◽  
Gel Beads ◽  
Pva Gel ◽  
Steep Liquor

PVA-gel beads were used as a biocarrier for treatment of corn steep liquor wastewater containing high levels of volatile fatty acids (VFA), where retention of biomass could be either solely in the porous microstructure of the gel or by granule formation using a gel bead as a nucleus. With stable COD removal efficiencies of 90% or greater, continuous treatment was demonstrated over a four month period, with organic loading rates being increased stepwise from 2.5 to 22.5 kg COD/m3 d. In addition, VFA in the effluent were, with few exceptions maintained close to zero. Gas production increased over the course of the study and reached a level of 0.38 m3/kg COD consisting of 65% methane with the remainder being mostly carbon dioxide. Biomass granules containing methane producing bacteria progressively formed around the PVA-gel beads during the study. In contrast, very few small natural granules developed apart from PVA-gel nuclei indicating that PVA gel may serve well as a seeding material to enhance granulation when natural occurrence is lacking.

scholarly journals High-strength ethylene glycol wastewater treatment in anaerobic polyvinyl alcohol gel beads based biofilm reactor

2015 ◽  
Vol 18 (1) ◽  
pp. 47-55
Keyword(s):  
Ethylene Glycol ◽  
Polyvinyl Alcohol ◽  
Settling Velocity ◽  
Loading Rate ◽  
High Strength ◽  
Biofilm Reactor ◽  
Cod Removal ◽  
Organic Loading Rate ◽  
Gel Beads ◽  
Pva Gel

<div> <p>In this paper, ethylene glycol wastewater (EGW) treatment was studied by using one anaerobic polyvinyl alcohol (PVA) gel beads based biofilm reactor. Enhanced by PVA-gel beads based biofilm, organic loading rate (OLR) about 11 g COD l<sup>-1</sup> d<sup>-1</sup> was achieved at the end of this study. Black PVA-gel beads with an average settling velocity 322 m h<sup>-1</sup> (9 cm s<sup>-1</sup>) and 0.24g VSS g<sup>-1</sup> PVA gel mainly composed of <em>Methanosarcina spp</em>. were got, while no natural granules were found in this experiment. The COD removal efficiency in this study could reach a high value about 95%. Most COD removal was contributed by the PVA-gel beads based biofilm. It could be concluded that the PVA-gel beads based biofilm reactor is appropriate for EGW treatment.</p> </div> <p>&nbsp;</p>

Improvement of gas permeability of denitrifying PVA gel beads

1996 ◽  
Vol 18 (7) ◽  
pp. 502-506 ◽  
Author(s):  
Kuo-Cheng Chen ◽  
Shu-Juan Chen ◽  
Jer-Yiing Houng
Keyword(s):  
Gas Permeability ◽  
Gel Beads ◽  
Pva Gel

scholarly journals STUDY ON POLYVINYL ALCOHOL GEL BEADS AS BIOCARRIER APPLIED IN ANAEROBIC SLUDGE IMMOBILIZATION IN THE UASB REACTOR

2018 ◽  
Vol 54 (4A) ◽  
pp. 197
Author(s):  
To Tien Tai
Keyword(s):  
Polyvinyl Alcohol ◽  
Promising Result ◽  
Sulfate Solution ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
High Mechanical Strength ◽  
Gel Beads ◽  
Rubber Wastewater ◽  
Pva Gel ◽  
Uasb Reactors

In this study, the biocarrier was made of 8 % (w/v) polyvinyl alcohol (PVA) solution dropped into saturated solution of boric acid (6 %, w/v), then immersed for 2 hours to form PVA-boric bead. In order to maintain the crosslinked beads, it is subsequently immersed in 1M sodium sulfate solution for 1 hour. PVA gel beads have the diameter of 3.5 - 5.0 mm, a specific gravity of 1.03 - 1.08 g/cm3, high mechanical strength and good elasticity. The surface and internal structure particle were observed under a scanning electron microscope (SEM). The application of PVA beads in microbial immobilization was initially examined in three UASB reactors treating rubber wastewater with sludge and PVA beads ratios of 1/1, 2/1, 3/1 (v/v), respectively. Promising result of bio-immobilization was achieved, at ratio of 1/1, the SMA of PVA beads was 0.133 g COD/gVSS/day, corresponding to 17 % of the suspended sludge’s value in the same reactor and the attached biomass was 0.936 g VSS/g dried PVA bead after 90 days.

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