open access

https://hdl.handle.net/2115/52266

Greywater treatment by slanted soil system

英語

Arid zone

2013-01

Elsevier B.V.

Ecological Engineering

50

62-68

Slanted soil system is low cost, simple system suitable for greywater treatment. Performance of the slanted soil system for greywater was evaluated in light of required water quality for irrigation reuse. Removal rate of particle COD and BDOC, those may cause clogging of irrigation facility, were 94-97% and 88-89%, respectively. LAS removal rates were more than 90% and final concentrations (2.3-3.3 mg L^[-1]) were sufficiently lower than proposed target level for irrigation use (8 mg L^[-1]). Only fine soil (1-4 mm) performed five logo10 and 3 log10 reductions of E. coli and MS2 phage, while coarse soil could not remove those pathogens. Clogging was observed in fine soil after 3-5 weeks operation, however combination of coarse soil chamber and fine soil chamber could extend it to 8 weeks. Reductions of total COD and LAS were described by 1st order reaction model and reaction coefficient k was described by equation of per area discharged rate.

学術雑誌論文

Accepted Manuscript

0925-8574