Helminth log reduction values for recycling water from sewage for the protection of human and stock health

WATER RESEARCH

卷:125

Article

Stevens, Daryl P.¹  Surapaneni, Aravind²  Thodupunuri, Rachna¹  O'Connor, Nicholas A.³  Smith, David² 

[1] Atura Pty Ltd, POB 434, Preston, Vic 3072, Australia

[2] South East Water, 101 Wells St, Frankston, Vic 3199, Australia

[3] Ecos Environm Consulting Pty Ltd, POB 1064G, North Balwyn, Vic 3104, Australia

关键词: QMRA;    Helminth guidelines;    Log reduction value;    Recycled water;    RawSewage;    Ascaris lumbricoides;    Taenia spp;    Fasciola hepatica;    Eggs (ova);   

DOI  :  10.1016/j.watres.2017.08.069

来源: Elsevier

【 摘 要 】

The LRVs required to decrease HE concentrations in raw sewage to an acceptable level to manage the risk to human and livestock health were determined. An LRV of 3.0 was required to meet the HBT of 1 mu DALY pppy in SE Australia where human helminth infections are not endemic. In comparison, a similar exposure volume and LRV in endemic regions would result in a HBT of 100 mu DALY pppy. The risks posed by cattle- and pig-related helminths were also managed acceptably with the treatment of sewage providing an LRV of 3.0. New design equations were derived to determine LRVs based on hydraulic residence times (HRTs) in an activated sludge plant (ASP) and lagoons. The new equation for lagoons indicated that an LRV of 3.0 could be achieved with a HRT of 18 days or less. (C) 2017 The Authors. Published by Elsevier Ltd.

【 授权许可】

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