Studies on Electrode Combination for COD Removal From Domestic Wastewater Using Electrocoagulation

2021 ◽  
Author(s):  
Million Ebba Bote
Keyword(s):  
Domestic Wastewater ◽  
Cod Removal ◽  
Electrode Combination

Coagulation-adsorption-ultrafiltration for wastewater treatment and reuse

2003 ◽  
Vol 3 (5-6) ◽  
pp. 361-365 ◽  
Author(s):  
D. Abdessemed ◽  
G. Nezzal ◽  
R. Ben Aim
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Domestic Wastewater ◽  
Powdered Activated Carbon ◽  
Cod Removal ◽  
Wastewater Reclamation ◽  
Wastewater Reclamation And Reuse ◽  
Pre Treatment ◽  
Uf Membranes ◽  
Tubular Membranes

We considered the treatment of domestic wastewater by coagulation–adsorption–ultrafiltration, and a test of adsorption like pre-treatment to the membrane as an alternative for wastewater reclamation and reuse. The performances of two inorganic tubular membranes (M2 and M5 CARBOSEP with 15,000 Da and 10,000 Da MWCO) were studied. Powdered activated carbon was used as adsorbent agent and FeCl3 as a coagulant. Coupling adsorption and ultrafiltration resulted in satisfactory results: the efficiency of COD removal was increased by using PAC compared with results obtained when using only UF membranes.

scholarly journals Performance Evaluation of Baffled and Floating Hybrid Constructed Wetland Operated Under Field Conditions

2020 ◽  
Vol 170 ◽  
pp. 06015
Author(s):  
Shrutee Dasare ◽  
Guru Munavalli
Keyword(s):  
Constructed Wetland ◽  
Loading Rate ◽  
Domestic Wastewater ◽  
Cost Effective ◽  
Cod Removal ◽  
Organic Loading Rate ◽  
Flow Conditions ◽  
Treatment Wetland ◽  
Efficient Treatment ◽  
Controlled Flow

Baffled and Floating Hybrid Constructed Wetland (BFHCW) consisting of constructed wetland with brickbat medium and Floating Treatment Wetland (FTW) was developed and operated under actual field flow conditions. BFHCW was vegetated with dual-species (Typha angustifolia L. and Canna indica). The performance of continuously operated system was evaluated for varied Hydraulic Loading Rate (HLR) and Organic Loading Rate (OLR) for a longer period. The system was also assessed for controlled flow rate resulting more uniform OLR and HLR. The results showed that COD removal efficiency was enhanced by 5 to 15% with controlled flow than uncontrolled highly fluctuating flow conditions. HLR has more impact on COD removal than OLR. BFHCW is effective to an extent of 25 to 40% for COD removal. BFHCW is found to be cost effective and reasonably efficient treatment for pretreated domestic wastewater.

Kinetic Analysis of COD Removal from Actual Domestic Wastewater in an Expanded Granular Sludge Bed (EGSB) Reactor

2012 ◽  
Vol 610-613 ◽  
pp. 1691-1695
Author(s):  
Chun Juan Dong ◽  
Qing Ye Pan
Keyword(s):  
Low Temperature ◽  
Removal Efficiency ◽  
Removal Rate ◽  
Experimental Studies ◽  
Domestic Wastewater ◽  
Pollutant Removal ◽  
Cod Removal ◽  
Utilization Rate ◽  
Cod Removal Efficiency ◽  
Pollutant Removal Rate

Treatment of actual domestic wastewater at ambient temperature, even low temperature is considered to be difficult by traditional systems. The present study is related to treatment of actual domestic wastewater in an EGSB reactor. The study showed the effectiveness of biological treatment of actual domestic wastewater involving appropriate microorganism and granules in an EGSB reactor. At 26°C, the reactor was operated at 18.7kg COD.m−3.d−1 of average organic loading and 83% high COD removal efficiency, and even at the highest loading rate of 57.12kgCOD.m−3.d−1, the COD removal efficiency still could attain to 68%. Varied influent flow need to supply varied optimal and thus to ensure the optimal removal effect. Low temperature would cause pollutant removal rate decrease. However, enhancing could optimize the contact of sludge and wastewater and thus strengthen the performance effect. Modified Stover–Kincannon model was applied to data obtained from experimental studies in EGSB reactor. Treatment efficiencies of the reactor were investigated at different hydraulic retention times (0.5-1.3h) and different operation temperature (15°C, 26°C). The modified Stover–Kincannon model was best fitted to the EGSB reactor, and the substrate utilization rate( ), saturation constant value( ), and actual pollutant removal rate( ) were found to be , , and for 26°C, , , and for 15°C( before increasing ), and , , and for 15°C(after increasing ). Low temperature could cause decrease and thus cause distinct decreasing of COD removal efficiency. However, increasing could increase and accordingly increase COD removal efficiency.

The effect of operational conditions on the performance of UASB reactors for domestic wastewater treatment

2005 ◽  
Vol 52 (1-2) ◽  
pp. 299-305 ◽  
Author(s):  
R.C. Leitão ◽  
J.A. Silva-Filho ◽  
W. Sanders ◽  
A.C. van Haandel ◽  
G. Zeeman ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Municipal Wastewater ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Operational Conditions ◽  
Cod Removal Efficiency ◽  
Uasb Reactors

In this investigation, the performance of Upflow Anaerobic Sludge Blanket (UASB) reactors treating municipal wastewater was evaluated on the basis of: (i) COD removal efficiency, (ii) effluent variability, and (iii) pH stability. The experiments were performed using 8 pilot-scale UASB reactors (120 L) from which some of them were operated with different influent COD (CODInf ranging from 92 to 816 mg/L) and some at different hydraulic retention time (HRT ranging from 1 to 6 h). The results show that decreasing the CODInf, or lowering the HRT, leads to decreased efficiencies and increased effluent variability. During this experiment, the reactors could treat efficiently sewage with concentration as low as 200 mg COD/L. They could also be operated satisfactorily at an HRT as low as 2 hours, without problems of operational stability. The maximum COD removal efficiency can be achieved at CODInf exceeding 300 mg/L and HRT of 6 h.

Performance of an ultra-compact biofilm reactor treating domestic and synthetic wastewaters

2012 ◽  
Vol 65 (3) ◽  
pp. 484-489
Author(s):  
Lee Chew Koh ◽  
Haiyang Zhang ◽  
Thi Thai Ha Nguyen ◽  
Say Leong Ong
Keyword(s):  
Carbon Source ◽  
Carbon Sources ◽  
Domestic Wastewater ◽  
Biofilm Reactor ◽  
Cod Removal ◽  
Synthetic Wastewater ◽  
Water Reclamation ◽  
Removal Efficiencies ◽  
Local Water

The performance of an ultra-compact biofilm reactor (UCBR) treating domestic wastewater (DWW) collected from a local water reclamation plant; and gradually shifting to a mono-type carbon source synthetic wastewater (SWW) combined with DDW (CWW) and finally SWW; was investigated in this study. The total COD concentrations of influent DWW and CWW/SWW were 413.6 ± 80.8 mg/L and 454.9 ± 51.3 mg/L, respectively. The UCBR was able to achieve average total COD removal efficiencies of 70 ± 10% and 80 ± 4% for DWW and SWW respectively. The total COD concentrations of the effluent of DWW and CWW/SWW were 122.5 ± 44.4 mg/L and 89.7 ± 10.3 mg/L, respectively. These observations suggested that heterotrophs in the UCBR system were able to better assimilate and remove carbon of mono-type SWW compared to diverse carbon sources such as DWW; although the influent soluble COD concentrations of the SWW were higher than those of the DWW. However, the effluent NH4+-N concentrations for both types of wastewater were rather similar, <3.0 mg/L; although the influent NH4+-N concentrations of the DWW were 1.5 times those of the SWW.

scholarly journals PENGOLAHAN LIMBAH CAIR INDUSTRI PERCETAKAN UANG KERTAS (UTAS) MENGGUNAKAN PROSES BIOLOGIS ANAEROB

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Rudi Nugroho ◽  
Ikbal Mahmud ◽  
Nurtya Sulasmi
Keyword(s):  
Wastewater Treatment ◽  
Fixed Bed ◽  
Domestic Wastewater ◽  
Full Scale ◽  
Cod Removal ◽  
Laboratory Scale ◽  
Fixed Bed Reactor ◽  
Optimum Conditions ◽  
Treatment Technology ◽  
Anaerobic Bioreactor

A research of wastewater treatment technology come from money producing industry was conducted in laboratory scale using 10 lt of Anaerobic Fixed Bed Reactor. The money producing wastewater was treated by mixing with domestic wastewater with various compositions. The wastewater was fed into the bioreactor by draw and fill daily.The results show that the optimum of COD removal is 52,5%, optimum loading is 0, 95 g-COD/l/day and optimum flowrate is 0,5 l/day. The optimum compossition of money producing wastewater towards domestic wastewater is 30%. These optimum conditions can be used as a designed criteria for full scale of anaerobic bioreactor in the money producing industry. Katakunci : Wastewater, Anaerobic, Fixed Bed Reactor

scholarly journals Chemically Enhanced Primary

2019 ◽  
Vol 4 (4) ◽  
pp. 115-123
Author(s):  
Mona Mohamed Amin Abdel Fatah ◽  
Ghada A. Al Bazedi
Keyword(s):  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Primary Treatment ◽  
Settling Time ◽  
Cod Removal ◽  
Secondary Treatment ◽  
Turbidity Removal ◽  
Treatment Processes ◽  
Domestic Wastewater Treatment ◽  
High Turbidity

The Chemically enhanced process is considered to be a physicochemical technology for domestic wastewater treatment. The objective of this paper is to improve the efficiency of primary treatment processes and reducing the Hazardous Material and cost of the secondary treatment stage either by eliminating a biological treatment, where conditions and standards allow or by reducing the secondary treatment requirements. Analysis of physicochemical parameters as well as the treatment efficiency of aluminum sulfate (alum), ferric chloride (FeCl3), lime (CaO), and seawater was used. The effect of pH and the coagulant dosages were studied as well as mixing and settling time. Conditions were optimized according to the removal efficiencies measured in terms of reduction in the concentration of total suspended solids (TSS), biological oxygen demand (BOD5), and chemical oxygen demand (COD). The optimum COD removal % was achieved at a settling time of 20 minutes, while at pH~6, alum gave a high turbidity % removal of approximately 90% at the dose of 70 mg/l. FeCl3 gave a high turbidity % removal of approximately 95% at the dose of 40 mg/l. Turbidity removal and TSS removal gave a similar pattern at a settling time of 10-20 minutes, where best results were achieved. The results also showed that at pH~4, FeCl3 gave high COD% removal of approximately 90% at the dose of 40 mg/l. By studying the effect of stirrers’ speed (rpm), the results showed that an increase in the mixing intensity, above 80 rpm decreases the removals of COD, Turbidity and TSS when using alum as a coagulant.

Sign in / Sign up

Export Citation Format

Share Document