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.

Domestic wastewater reclamation by submerged membrane bioreactor with high concentration powdered activated carbon for stream restoration

2004 ◽  
Vol 50 (2) ◽  
pp. 173-178 ◽  
Author(s):  
G.T. Seo ◽  
H.I. Ahan ◽  
J.T. Kim ◽  
Y.J. Lee ◽  
I.S. Kim
Keyword(s):  
Activated Carbon ◽  
Stream Restoration ◽  
Reclaimed Water ◽  
Domestic Wastewater ◽  
Powdered Activated Carbon ◽  
Urban Stream ◽  
Wastewater Reclamation ◽  
High Concentration ◽  
K Value ◽  
Cake Layer

This study focuses on the practical application of high concentration powdered activated carbon coupled membrane bio-reactor to domestic wastewater reclamation. The study was conducted in three parts, such as analysis of secondary domestic wastewater effluent, design and operation parameter evaluation and reclaimed water quality estimation for stream restoration. The organic concentration was 25.2-80.2 mgCODCr/L for the effluent of three domestic wastewater treatment plants. Around 50-75% of the COD was low molecular substances less than 1,000 which were quite biodegradable. The sawdust PAC was estimated to be proper adsorbent for the organics in the secondary effluents. Its Freundlich constant, K value was 5.847 and 1/n, 0.36. Using a system consists of single reactor with high concentration PAC (80 g/L) and submerged hollow fiber MF membrane module with nominal pore size of 0.1 μm, design and operation parameters were obtained, such as HRT of the bioreactor (2.5 hr), PAC concentration (80 g/L), the initial ßux (less than 0.5 m/day) and intermittent suction cycle (12 min. suction and 3 min. idling). Organic removal by the system was high enough to produce reclaimed water for urban stream restoration The effluent organic concentration was at the level of 2 mg/L in terms of TOC (around 5 mg/L as CODCr). Substances with molecular weight cut off <1,000 were removed mostly by adsorption and biodegradation. Those above 1,000 were rejected at PAC cake layer on the membrane and gradually degraded by microorganisms during extended contact.

scholarly journals Bioelectricity production from tofu wastewater using microbial fuel cells with microalgae Spirulina sp as catholyte

2020 ◽  
Vol 202 ◽  
pp. 08007
Author(s):  
Wahyu Zuli Pratiwi ◽  
Hadiyanto Hadiyanto ◽  
Purwanto Purwanto ◽  
Muthi’ah Nur Fadlilah
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Organic Waste ◽  
Oxygen Demand ◽  
Salt Bridge ◽  
Cod Removal ◽  
Biofuel Production ◽  
Pre Treatment ◽  
Made In

Microalgae-Microbial Fuel Cells (MMFCs) are very popular to be used to treat organic waste. MMFCs can function as an energy-producing wastewater pre-treatment system. Wastewater can provide an adequate supply of nutrients, support the large capacity of biofuel production, and can be integrated with existing wastewater treatment infrastructure. The reduced content of Chemical Oxygen Demand (COD) is one way to measure the efficiency of wastewater treatment. MMFCs reactors are made in the form of two chambers (anode and cathode) both of which are connected by a salt bridge. Tofu wastewater as an anode and Spirulina sp as a cathode. To improve MFCs performance which is to obtain maximum COD removal and electricity generation, nutrient NaHCO3 as the nutrient carbon source for Spirulina sp was varied. The system running phase on 12 days. The results were Spirulina sp treated with MFCs technology has better growth than non-MFCs. The MMFC generated a maximum power density of 21.728 mW/cm2 and achieved 57.37% COD removal. These results showed that the combined process was effective in treating tofu wastewater.

EVALUATION OF POWDERED ACTIVATED CARBON PERFORMANCE FOR WASTEWATER TREATMENT CONTAINING ORGANIC (C6H6 AND C6H5-CH3) AND INORGANIC (Pb+2 AND Zn+2) POLLUTANTS

2016 ◽  
Vol 15 (5) ◽  
pp. 1003-1008 ◽  
Author(s):  
Cristina Ileana Covaliu ◽  
Ecaterina Matei ◽  
Gabriela Georgescu ◽  
Teodora Malaeru ◽  
Sorin Stefan Biris
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Powdered Activated Carbon ◽  
Carbon Performance
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