Enhanced degradation of phenolic compounds in coal gasification wastewater by an iron‑carbon micro-electric field coupled with anaerobic co-digestion

2021 ◽  
pp. 151991
Author(s):  
Yajie Li ◽  
Mengyan Wang ◽  
Jingli Qian ◽  
Yaoliang Hong ◽  
Tianyin Huang
Keyword(s):  
Phenolic Compounds ◽  
Electric Field ◽  
Coal Gasification ◽  
Coal Gasification Wastewater ◽  
Enhanced Degradation

Treatment Phenolic Compounds in Coal Gasification Wastewater by Hydrolytic Acidification-AO Process

2013 ◽  
Vol 807-809 ◽  
pp. 1083-1086 ◽  
Author(s):  
Peng Xu ◽  
Hong Jun Han ◽  
Sheng Yong Jia ◽  
Bao Lin Hou ◽  
Qian Zhao
Keyword(s):  
Phenolic Compounds ◽  
Coal Gasification ◽  
Total Phenols ◽  
Start Up ◽  
Coal Gasification Wastewater ◽  
Removal Efficiencies ◽  
Two Stages ◽  
Hydrolytic Acidification

Using hydrolytic acidification-AO process treating coal gasification wastewater, the COD, total phenols in the effluent and the removal efficiencies were studied. The start-up period was separated to two stages with influent COD concentration of 1500 and 2500mg/L. After 59 days operation, the COD and total phenols removal efficiencies were 80.3% and 72.9%, respectively. The COD and total phenols increased to 925.4 and 238.7mg/L when the HRT was reduced to 6h with the corresponding concentrations of influent were 2512.9 and 493.4mg/L. When the HRT in hydrolytic acidification was reduced to 100%, the removal of total phenols dropped from 75.4% to 57.6%. The bigger circle ratio of 500% didn't have obviously effect on total phenols removal of the process.

scholarly journals Strategies for recovering inhibition caused by phenolic compounds in a short-cut nitrogen removal reactor treating coal gasification wastewater

2015 ◽  
Vol 5 (4) ◽  
pp. 569-578 ◽  
Author(s):  
Qian Zhao ◽  
Hongjun Han ◽  
Fang Fang ◽  
Haifeng Zhuang ◽  
Dexin Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Phenolic Compounds ◽  
Nitrogen Removal ◽  
Coal Gasification ◽  
Activated Carbons ◽  
Powdered Activated Carbon ◽  
Nitrifying Bacteria ◽  
Quick Recovery ◽  
Coal Gasification Wastewater ◽  
Biological Nitrogen

Different strategies, including extension of hydraulic retention time (HRT), dilution, and addition of powdered activated carbon (PAC) and super-powdered activated carbon (S-PAC), were investigated for the quick recovery of nitrifying bacteria activity from the inhibition of coal gasification wastewater (CGW). A laboratory-scale short-cut biological nitrogen removal (SBNR) reactor treating CGW, achieving high levels (90%) of nitrogen removal, was used. After a shock of phenolic compounds (around 250 mg/L) and a failed performance, the results of the batch recovery tests indicated that the PAC and S-PAC addition were the best recovery strategies. In the SBNR reactor, the addition of 1 g/L PAC and S-PAC shortened the recovery time from the natural recovery of 32 days to 13 days and 10 days, respectively. Fluorescence in situ hybridization (FISH) assay and the adsorption isotherms revealed that activated carbons absorbed phenolic compounds, reducing the toxicity and allowing for the quick recovery of SBNRs treating CGW. S-PAC showed greater adsorption capacity for phenol than PAC.

Removal of nitrogen from coal gasification wastewater by nitrosofication and denitrosofication

1998 ◽  
Vol 38 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Junxin Liu ◽  
Weiguang Li ◽  
Xiuheng Wang ◽  
Hongyuan Liu ◽  
Baozhen Wang
Keyword(s):  
Nitrogen Removal ◽  
Coal Gasification ◽  
Oxygen Demand ◽  
Test Results ◽  
New Process ◽  
Scale Test ◽  
Coal Gasification Wastewater ◽  
Total Nitrogen Removal ◽  
Biological Nitrogen ◽  
Bench Scale Test

In this paper, a study of a new process with nitrosofication and denitrosofication for nitrogen removal from coal gasification wastewater is reported. In the process, fibrous carriers were packed in an anoxic tank and an aerobic tank for the attached growth of the denitrifying bacteria and Nitrobacter respectively, and the suspended growth activated sludge was used in an aerobic tank for the growth of Nitrosomonas. A bench scale test has been carried out on the process, and the test results showed that using the process, 25% of the oxygen demand and 40% of the carbon source demand can be saved, and the efficiency of total nitrogen removal can increase over 10% as compared with a traditional process for biological nitrogen removal.

Study on CO 2 gasification properties of coal gasification wastewater slurry

2021 ◽  
Author(s):  
Jianzhong Liu ◽  
Dedi Li ◽  
Jianbin Wang ◽  
Zhi Chen ◽  
Jun Cheng ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Coal Gasification Wastewater
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