دورية أكاديمية
أعرض في EDS

Filter media depth and its effect on the efficiency of Household Slow Sand Filter in continuous flow.

التفاصيل البيبلوغرافية
العنوان: Filter media depth and its effect on the efficiency of Household Slow Sand Filter in continuous flow.
المؤلفون: Freitas BLS; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, Avenida Trabalhador São-Carlense, 400, São Carlos, São Paulo, 13566-590, Brazil., Terin UC; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, Avenida Trabalhador São-Carlense, 400, São Carlos, São Paulo, 13566-590, Brazil., Fava NMN; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, Avenida Trabalhador São-Carlense, 400, São Carlos, São Paulo, 13566-590, Brazil., Sabogal-Paz LP; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, Avenida Trabalhador São-Carlense, 400, São Carlos, São Paulo, 13566-590, Brazil. Electronic address: lysaboga@sc.usp.br.
المصدر: Journal of environmental management [J Environ Manage] 2021 Jun 15; Vol. 288, pp. 112412. Date of Electronic Publication: 2021 Apr 07.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Academic Press Country of Publication: England NLM ID: 0401664 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8630 (Electronic) Linking ISSN: 03014797 NLM ISO Abbreviation: J Environ Manage Subsets: MEDLINE
أسماء مطبوعة: Original Publication: London ; New York, Academic Press.
مواضيع طبية MeSH: Sand* , Water Purification*, Escherichia coli ; Family Characteristics ; Filtration ; Silicon Dioxide
مستخلص: This study evaluated the impact of a 50% reduction of filter media depth in Household Slow Sand Filters (HSSFs) on continuous flow to remove physicochemical and microbiological parameters from river water. Furthermore, simple pre-treatment and disinfection processes were evaluated as additional treatments. Two filter models with different filtration layer depths were evaluated: a traditional one with 50 cm media depth (T-HSSF) and a compact one (C-HSSF) with 25 cm. HSSFs were fed with pre-treated river water (24-h water sedimentation followed by synthetic fabric filtration) for 436 days at a constant filtration rate of 0.90 m 3  m -2 day -1 with a daily production of 48 L day -1 . Sodium hypochlorite (2.0 mg L -1 of NaOCl 2.5% for 30 min) was used to disinfect the filtered water. Water samples were analysed weekly for parameters such as turbidity, organic matter, colour and E. coli, among others. Removal of protozoan cysts and oocysts by the HSSFs were also evaluated. After pretreatment, turbidity from the HSSF river water was reduced to 13.2 ± 14.6 NTU, allowing the filters to operate. Statistical analysis indicated no significant difference (p > 0.05) between T-HSSF and C-HSSF efficiencies in all evaluated parameters throughout operation time. Hence, media depth reduction did not hinder continuous HSSF performance for almost all the evaluated parameters. However, it may have affected Giardia cysts retaining, which passed through the thinner media on one evaluation day. Disinfection was effective in reducing remaining bacteria from filtered water; however, it was ineffective to inactivate protozoa. The reduction in the filtration layer did not affect the overall filtered water quality or quantity showing that a compact HSSF model may be a viable option for decentralized water treatment.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
فهرسة مساهمة: Keywords: Biosand filter; Decentralized treatment; Drinking water; Fine sand; River water
المشرفين على المادة: 0 (Sand)
7631-86-9 (Silicon Dioxide)
تواريخ الأحداث: Date Created: 20210406 Date Completed: 20210427 Latest Revision: 20210427
رمز التحديث: 20221213
DOI: 10.1016/j.jenvman.2021.112412
PMID: 33823447
قاعدة البيانات: MEDLINE
الوصف
تدمد:1095-8630
DOI:10.1016/j.jenvman.2021.112412