Demonstration of a treatment system for purification and reuse of laundry wastewater

Ciabattia, I.; Cesaro, F.; Faralli, L.; Fatarella, Enrico; Tognotti, F.

doi:10.1016/j.desal.2009.02.008

Cited by 114 publications

(65 citation statements)

References 19 publications

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“…Ramon et al (2004) compared the filtration efficiency of low load gray water using ultrafiltration and nanofiltration membranes. In addition, Ciabatti et al (2009) employed an ultrafiltration membrane and achieved an effective removal efficiency of contaminants in laundry effluent. However, the major disadvantage of membrane process is fouling (Koh et al, 2005;Zhao et al, 2013).…”

Section: Introductionmentioning

confidence: 98%

“…Laundry water is one type of gray water, which consists of high concentrations of chemicals from soap powders as well as bleaches, suspended solids and possibly oil, paints etc. These have chemical oxygen demands (COD) values of 1200-20,000 mg/l, while laundries that wash items from households and hotels contain effluents with COD values of 400-1200 mg/l (Ciabatti et al, 2009). The toxic effects of these pollutants are listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Treatment of laundry wastewater using polyethersulfone/polyvinylpyrollidone ultrafiltration membranes

Anappara

Arthanareeswaran

Thuyavan

et al. 2015

Ecotoxicology and Environmental Safety

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Treatment of laundry wastewater using polyethersulfone/polyvinylpyrollidone ultrafiltration membranes

Anappara

Arthanareeswaran

Thuyavan

et al. 2015

Ecotoxicology and Environmental Safety

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“…As expected, the UF surfactants removals [16][17][18] are lower than the NF ones [19,20]. Besides, for charged organic compounds, electrostatic attraction or repulsion forces between the component and the membrane infl uences the degree of fouling [21,22]. Van der Bruggen et al [20] concluded that in surfactant removal by NF the anionic surfactants presented the least problems of membrane fouling.…”

Section: Introductionmentioning

confidence: 91%

Removal of anionic surfactants by nanofiltration

Korzenowski

Martins²,

Bernardes

et al. 2012

Desalination and Water Treatment

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A B S T R AC TThis work addresses the assessment of nanofi ltration (NF) in terms of membrane characteristics, operating transmembrane pressure and feed composition for the maximal removal of anionic surfactants in wastewater from a detergent industry. Model solutions of linear alkylbenzene sulphonates (LAS) and sodium lauryl ether sulphates (SLES) covering a wide range of SLES/LAS ratios are used as surrogates of the wastewaters with 0.43 g l −1 of methylene blue active substances (MSAS). The NF experiments are carried out in a unit equipped with NF-90, NF-200 and NF-270 membranes (FilmTec Corp., USA). The applied pressure varied from 15 to 25 bar. The rejection coeffi cients to total organic carbon (TOC) are practically independent of pressure and are higher than 95% for all model solutions and higher than 92% for the wastewater. The SLES solutions have the highest permeation fl uxes of 20-33, 121-207 and 242-371 kg h −1 m −2 for NF90, NF200 and NF270 membranes, respectively. The permeation fl uxes for the other model solutions have intermediate values between the ones of the SLES solution and the ones of the wastewater. These present permeations fl uxes as low as 10-11 kg h −1 m −2 for the NF 200 and the NF 270 membranes.

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“…Figure 7 clearly shows the reduction of residual COD as the [H 2 O 2 ]/COD ratio increases. In a related study, Ciabatti et al (2009) recommended the limit value of 100 mg L −1 for COD in order to enable a partial wastewater reuse in an industrial laundry. Except for the [H 2 O 2 ]/COD ratio = 0.5, all tested conditions resulted in residual COD lower than 100 mg L −1 , highlighting the potentiality of UV/H 2 O 2 process for the treatment of hospital laundry wastewater.…”

Section: Evaluation Of Uv-h 2 O 2 Processmentioning

confidence: 99%

Treatment of hospital laundry wastewater by UV/H2O2 process

Zotesso

Cossich

Janeiro

et al. 2016

Environ Sci Pollut Res

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Hospitals consume a large volume of water to carry out their activities and, hence, generate a large volume of effluent that is commonly discharged into the local sewage system without any treatment. Among the various sectors of healthcare facilities, the laundry is responsible for the majority of water consumption and generates a highly complex effluent. Although several advanced oxidation processes (AOPs) are currently under investigation on the degradation of a variety of contaminants, few of them are based on real wastewater samples. In this paper, the UV/HO AOP was evaluated on the treatment of a hospital laundry wastewater, after the application of a physicochemical pretreatment composed of coagulation-flocculation and anthracite filtration. For the UV/HO process, a photoreactor equipped with a low-pressure UV-C lamp was used and the effects of initial pH and [HO]/chemical oxygen demand (COD) ratio on COD removal were investigated through a randomized factorial block design that considered the batches of effluent as blocks. The results indicated that the initial pH had no significant effect on the COD removal, and the process was favored by the increase in [HO]/COD ratio. Color and turbidity were satisfactorily reduced after the application of the physicochemical pretreatment, and COD was completely removed by the UV/HO process under suitable conditions. The results of this study show that the UV/HO AOP is a promising candidate for hospital laundry wastewater treatment and should be explored to enable wastewater reuse in the washing process.

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Demonstration of a treatment system for purification and reuse of laundry wastewater

Cited by 114 publications

References 19 publications

Treatment of laundry wastewater using polyethersulfone/polyvinylpyrollidone ultrafiltration membranes

Treatment of laundry wastewater using polyethersulfone/polyvinylpyrollidone ultrafiltration membranes

Removal of anionic surfactants by nanofiltration

Treatment of hospital laundry wastewater by UV/H2O2 process

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