Decoloration system using rotating membrane UF module

1998 ◽  
Vol 38 (6) ◽  
pp. 35-43
Author(s):  
Makoto Ohnishi ◽  
Yutaka Okuno ◽  
Naoki Ohkuma
Keyword(s):  
Activated Carbon ◽  
Retention Time ◽  
Biological Treatment ◽  
Treatment Process ◽  
Powdered Activated Carbon ◽  
Wastewater Reclamation ◽  
System A ◽  
Reclamation System ◽  
Colored Matter ◽  
Biological Treatment Process

A wastewater reclamation system using a rotating membrane UF module has been studied by adding a powdered activated carbon to a biological treatment process to remove the organic colored matter. In this system, a powdered activated carbon dosage of 50 mg/l, and retention time of 4.5 hours have been required to stably obtain a treated water with a color of less than 5 degrees. It was found that the activated sludge dewaterability could be improved by adding the powdered activated carbon and the rotating membrane UF module could operate at a set flux of 1.0 m3/m2·d for about one and half years.

PVA-coated activated carbon for aerobic biological treatment of concentrated refractory organic wastewater

2000 ◽  
Vol 42 (3-4) ◽  
pp. 205-210 ◽  
Author(s):  
B.-R. Lim ◽  
H.-Y. Hu ◽  
N. Goto ◽  
K. Fujie
Keyword(s):  
Activated Carbon ◽  
Steady State ◽  
Sulfonic Acid ◽  
Biological Treatment ◽  
Treatment Process ◽  
Solid Phase ◽  
Volumetric Loading ◽  
Ubiquinone 10 ◽  
Polyvinyl Alcohol Particles ◽  
Biological Treatment Process

The treatment characteristics of concentrated p-phenol sulfonic acid (PSA) wastewater in a submerged bioreactor and a solid phase bioreactor packed with ACP particles (polyvinyl alcohol particles coated with powered activated carbon) were compared experimentally. The changes in biomass and microbial community with the degradation of PSA at both bioreactors were also evaluated using microbial quinones as an index. Greater than 95% of influent PSA was mineralized at the solid phase bioreactor under the volumetric loading of PSA ranging from 0.3 to 1.8 kg-C·m-3·d-1 at the steady state, but less than 10% of the influent PSA was mineralized in the submerged bioreactor. The solid phase aerobic biological treatment process was more effective for the treatment of concentrated refractory chemicals such as PSA than the submerged bioreactor. The dominant quinone species in the solid phase bioreactor were ubiquinone-10 and menaquinone-8(H4), while those in the submerged bioreactor were ubiquinone-8 and menaquinone-8. This suggests hat different microbes had contributed to the degradation in the two bioreactors.

Adsorption of Diclofenac, Sulfamethoxazole and Levofloxacin with Powdered Activated Carbon

2017 ◽  
Author(s):  
Erki Lember ◽  
Karin Pachel ◽  
Enn Loigu
Keyword(s):  
Activated Carbon ◽  
Residence Time ◽  
Biological Treatment ◽  
Treatment Process ◽  
Wastewater Treatment Plants ◽  
Adsorption Property ◽  
Powdered Activated Carbon ◽  
Pharmaceutical Residues ◽  
Adsorption Processes ◽  
Global Concern

The presence of pharmaceutical residues in the receiving waterbodies of wastewater treatment plants (WWTP) and in the environment has become a global concern. We can now say for certain that, having metabolised in our bodies, partially modified or unmodified pharmaceuticals will reach WWTP. However, WWTP are not designed for the removal of such com-pounds. Only a small fraction of pharmaceuticals decompose during biological treatment or are adsorbed in sediment. There-fore, it is essential to find a treatment process that is capable of removing pharmaceutical residues. The aim of the present study was to research the removal of three pharmaceuticals found in the environment, namely diclofenac (DCF), sulfamethoxazole (SMX) and levofloxacin (LFX), through the use of powdered activated carbon (PAC). To this end, adsorption tests were con-ducted where the adsorption capacity was estimated according to the adsorbent dose and the residence time of the process. LFX had the highest adsorption rate: the removal effectiveness was 77% in a residence time of 5 minutes and in 60 minutes a stable indicator was achieved whereby 94% of LFX had become adsorbed. The worst adsorption property was observed for SMX, as 68% of SMX was adsorbed in a residence time of 60 minutes. According to the conducted tests, the Freundlich adsorption isotherms and constants characterising the adsorption were found where the DCF K was 23.8, the SMX K was 34.3 and the LFX K was 106.1. This test demonstrated that the pharmaceuticals selected for the experiment could easily be subjected to adsorption processes and could be removed by means of PAC.

Using Two-Phase Anaerobic Digestion for Organic Waste

2014 ◽  
Vol 953-954 ◽  
pp. 300-303 ◽  
Author(s):  
Fang Yin ◽  
Wu Di Zhang ◽  
Jing Liu ◽  
Hong Yang
Keyword(s):  
Anaerobic Digestion ◽  
Biological Treatment ◽  
Organic Waste ◽  
Single Phase ◽  
Treatment Process ◽  
Maximal Activity ◽  
Two Phase ◽  
High Efficient ◽  
Development Direction ◽  
Biological Treatment Process

The essence of the two phase anaerobic biological treatment process is to place acid bacteria and methane-producing bacteria in two reactors respectively, where it can provide the optimal conditions for their growth and metabolism, allowing them to live up to their maximal activity, which greatly improve processing capacity and efficiency compared to a single-phase anaerobic digestion. The paper start with the two phase anaerobic digestion process, in order to discuss the development direction of high efficient anaerobic digestion system.

The changes of bamboo pulping waste water residuals in biological treatment process

2018 ◽  
Vol 33 (1) ◽  
pp. 14-20 ◽  
Author(s):  
Long Liang ◽  
Ying Qiao Shi ◽  
Guigan Fang ◽  
Aixiang Pan ◽  
Qinwen Tian ◽  
...  
Keyword(s):  
Waste Water ◽  
Biological Treatment ◽  
Treatment Process ◽  
Biological Treatment Process
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