scholarly journals Tire pyrolysis wastewater treatment by a combined process of coagulation detoxification and biodegradation

2021 ◽  
pp. 100129
Author(s):  
Xiao-ran Shen ◽  
Chun-Xiang Geng ◽  
Bing-Qian Lv ◽  
Wei Xu ◽  
Yi Xu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Combined Process

Textile Wastewater Treatment Using Combined Process of Biological Wriggle Bed and Ozone Biological Aerated Filter

2012 ◽  
Vol 441 ◽  
pp. 589-592
Author(s):  
Zhi Min Fu ◽  
Yu Gao Zhang ◽  
Xiao Jun Wang
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Textile Wastewater ◽  
Cod Removal ◽  
Biological Aerated Filter ◽  
Combined Process ◽  
Cod Removal Efficiency ◽  
Aerated Filter ◽  
Textile Wastewater Treatment

A combined process of biological wriggle bed and ozone biological aerated filter was utilized to treat textile wastewater. Results showed that COD removal efficiency was almost 90.4%. The average effluent COD was 85.87 mg/L. The effluent colority was 64-32 times. This study indicated that the combined process is potentially useful for treating textile wastewater.

Evaluation of the Combined Process of Aammonia Distillation-Evaporation Concentration - Supercritical Water Gasification - Supercritical Water Oxidation for Coking Wastewater Treatment

2013 ◽  
Vol 763 ◽  
pp. 191-194 ◽  
Author(s):  
Yu Zhen Wang ◽  
Shu Zhong Wang ◽  
Yang Guo ◽  
Dong Hai Xu
Keyword(s):  
Wastewater Treatment ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Coking Wastewater ◽  
Supercritical Water Oxidation ◽  
Combined Process ◽  
Whole Process ◽  
Evaporation Concentration ◽  
Supercritical Water Gasification ◽  
Operation Cost

A combined process of ammonia distillation - evaporation concentration - supercritical water gasification (SCWG) supercritical water oxidation (SCWO) was proposed for coking wastewater treatment. The NH3 in wastewater was first recovered in ammonia distillation section. The deammoniated wastewater was concentrated in the evaporation concentration section, in which the quantity of the wastewater was decreased accordingly. Then the concentrated wastewater entered into the SCWG section to produce the syngas such as H2, CO, CH4, and liquid effluent entered into SCWO section, where the pollutants were completely degraded. The operation parameters of the combined process were simulated by Aspen Plus software and the investment and the operation cost were also analyzed. For a wastewater of 5000kg/h, the investment of the combined process is 6000000 ¥. The profit from byproduct of ammonia, syngas and steam is 70¥/t. For the whole process, it can gain a profit of 5.1 ¥/t (wastewater).

Application of a combined process of moving-bed biofilm reactor (MBBR) and chemical coagulation for dyeing wastewater treatment

2006 ◽  
Vol 54 (9) ◽  
pp. 181-189 ◽  
Author(s):  
D.H. Shin ◽  
W.S. Shin ◽  
Y.-H. Kim ◽  
Myung Ho Han ◽  
S.J. Choi
Keyword(s):  
Wastewater Treatment ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Biofilm Reactor ◽  
Dyeing Wastewater ◽  
Moving Bed Biofilm Reactor ◽  
Combined Process ◽  
Chemical Coagulation ◽  
Moving Bed ◽  
Textile Wastewater Treatment

A combined process consisted of a Moving-Bed Biofilm Reactor (MBBR) and chemical coagulation was investigated for textile wastewater treatment. The pilot scale MBBR system is composed of three MBBRs (anaerobic, aerobic-1 and aerobic-2 in series), each reactor was filled with 20% (v/v) of polyurethane-activated carbon (PU-AC) carrier for biological treatment followed by chemical coagulation with FeCl2.In the MBBR process, 85% of COD and 70% of color (influent COD=807.5 mg/L and color=3,400 PtCo unit) were removed using relatively low MLSS concentration and short hydraulic retention time (HRT=44 hr). The biologically treated dyeing wastewater was subjected to chemical coagulation. After coagulation with FeCl2, 95% of COD and 97% of color were removed overall. The combined process of MBBR and chemical coagulation has promising potential for dyeing wastewater treatment.

scholarly journals Research on System Optimizing of AAO-BAF Wastewater Treatment Process

2018 ◽  
Vol 53 ◽  
pp. 04028
Author(s):  
Shoubin Zhang ◽  
Wei Sun ◽  
Wenhai Jiao ◽  
Liping Qiu ◽  
Jingxiu Zhong ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Electron Acceptor ◽  
Phosphorus Removal ◽  
Treatment Process ◽  
Treatment System ◽  
Research Progress ◽  
Combined Processes ◽  
Wastewater Treatment Process ◽  
Combined Process ◽  
Wastewater Treatment System

To meet the more strict discharging standard, some combined processes have emerged to realize denitrification and phosphorus removal of wastewater more efficiently. Among them, AAO-BAF combined process was an efficient one. The AAO-BAF system was composed of AAO reactor and BAF. The AAO process was the main unit to complete phosphorus removal and denitrification. The BAF process, external nitrification unit, was mainly used to provide enough electron acceptor for denitrifying bacteria in AAO reactor, which could enhance the efficiency of denitrification of the whole system. So the system optimizing was essential to AAO-BAF combined process. In this paper, the research progress of AAO-BAF wastewater treatment system was summarized and some system optimizing methods were raised too.

scholarly journals Research on Phthalic Acid Esters Removal and Its Health Risk Evaluation by Combined Process for Secondary Effluent of Wastewater Treatment Plant

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Simin Li ◽  
Yongkang Lv ◽  
Na Zhao
Keyword(s):  
Wastewater Treatment ◽  
Health Risk ◽  
Wastewater Treatment Plant ◽  
Phthalic Acid ◽  
Treatment Plant ◽  
Secondary Effluent ◽  
Phthalic Acid Esters ◽  
Combined Process ◽  
Acid Esters

This paper analyses the treatment effect of the “coagulation-sedimentation-O3-biological sand filtration-GAC” combined process on phthalic acid esters in secondary effluent of municipal wastewater treatment plant and meanwhile evaluate its health risk. The results indicated that when the concentrations of DBP and DiOP in secondary effluent were at range of 0.41 mg/L–0.814 mg/L and 0.23 mg/L–0.36 mg/L, the average total removal rates of DBP and DiOP were 85.10% and 68.11%, and the average concentration of DBP and DiOP in effluent were 0.089 mg/L and 0.091 mg/L, respectively. The quality of the effluent met the requirement of the ornamental scenic environment water inThe Quality of Urban Wastewater Recycling and Scenic Environment Water (GB/T 18921-2002), and the health risks of DBP and DiOP in effluent were at range of 1.99 × 10−12 –2.15 × 10−12/a and 1.48 × 10−11 –1.85 × 10−11/a, respectively, which is lower than the acceptable maximum risk level: 1.0 × 10−6.

Aerobic Bio-oxidation with Ozonation for Recalcitrant Wastewater Treatment

2008 ◽  
Vol 11 (2) ◽  
Author(s):  
Inna Kamenev ◽  
Andres Viiroja ◽  
Juha Kallas
Keyword(s):  
Wastewater Treatment ◽  
Oil Shale ◽  
Chemical Oxidation ◽  
Treated Wastewater ◽  
Circulation System ◽  
Direct Introduction ◽  
Combined Process ◽  
Oxidation Processes ◽  
Purification Efficiency ◽  
Treatment Processes

AbstractThe aim of the present research was to find a combination of biological and chemical oxidation processes that improves the purification efficiency of recalcitrant wastewater treatment at reduced ozone consumption. The following wastewater treatment processes were experimentally studied: conventional aerobic biooxidation, post-ozonation of biologically treated wastewater, a combined process - aerobic bio-oxidation with ozonation in a re-circulation system - and aerobic bio-oxidation with direct introduction of ozone-containing water into a bioreactor. A synthetic landfill leachate corresponding in its composition to leachate of young landfills, thermo-mechanical pulping water, and phenolic effluent from the Estonian oil shale industry were used as wastewaters. It was established that compared with conventional aerobic bio-oxidation, the combined process enables an improvement in purification efficiency even at relatively low ozone doses (10 to 60 mgO

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