Review of the technological approaches for grey water treatment and reuses
ABSTRACT Based on literature review, a non-potable urban grey water reuse standard is proposed and the treatment alternatives and reuse scheme for grey water reuses are evaluated according to grey water characteristics and the proposed standard. The literature review shows that all types of grey water have good biodegradability. The bathroom and the laundry grey water are deficient in both nitrogen and phosphors. The kitchen grey water has a balanced COD: N: P ratio. The review also reveals that physical processes alone are not sufficient to guarantee an adequate reduction of the organics, nutrients and surfactants. The chemical processes can efficiently remove the suspended solids, organic materials and surfactants in the low strength grey water. The combination of aerobic biological process with physical filtration and disinfection is considered to be the most economical and feasible solution for grey water recycling. The MBR appears to be a very attractive solution in collective urban residential buildings.
SourceAvailable from: Sibel Barisci[Show abstract] [Hide abstract]
ABSTRACT: Greywater reuse is an attractive alternative to sustainable water management, especially in water scarcity situations. This study sought to determine the treatment efficiency of electrochemically produced ferrate(VI) in greywater, assessing ferrate(VI) dose requirements and pH effect. Greywater originating from a restaurant was employed in this research. The treatment efficiency was investigated with regard to the chemical oxygen demand (COD), total organic carbon, turbidity, surfactants, and anions removal. The optimum performance was achieved with 75 mg/L of ferrate(VI) dose at pH 7. The settling characteristics of the treated greywater were also investigated. After treatment, larger particles and zeta potential values closer to zero were observed. Electrochemically produced ferrate(VI) showed promising performance for greywater treatment.Desalination and water treatment 04/2015; DOI:10.1080/19443994.2015.1038740 · 0.99 Impact Factor
[Show abstract] [Hide abstract]
ABSTRACT: THE PRESENT study deals with real greywater that was collected from five flats and connected to a pilot plant. The research study aims at evaluation of greywater treatment and reuse using diverse phico-chemical treatment process including sedimentation, coagulation/flocculation and Fenton`s reaction. The study includes the evaluation of different settling times using two successive sedimentation tanks that received raw greywater. The chemical coagulation phase includes lime and lime aided with ferric chloride as well as advanced oxidation (as Fenton’s reaction). The experimental method involves monitoring of specific water quality constituents, under varying operating conditions, at different sedimentation periods and different chemicals doses to reach the sustainable approach. Greywater treatment was examined first in batch experiments to determine the optimum operating conditions including: the settling time, the dose of lime (CaO), ferric chloride (FeCl3), and Fenton’s reaction [Fe2(SO4)3.H2O2]. The obtained optimum conditions were implemented throughout the pilot plant investigation.
Conference Paper: Household Greywater Treatment by Electrosynthesized Ferrate (VI)ICOEST, Side Turkey; 05/2014