Reduction and partitioning of viral and bacterial indicators in a UASB reactor followed by high rate algal ponds treating domestic sewage

Human enteric pathogens are a major global concern, as they responsible for thousands of preventable deaths every year. New in wastewater constantly emerging. For example, SARS-CoV-2 has been recently detected domestic sewage and primary sludge. Knowledge about the reduction viruses treatment their partitioning between treated liquid effluent versus sludge or biosolids is still very scarce, especially countries with emerging economies tropical climates. Upflow anaerobic blanket (UASB) reactors among top three most commonly used technologies Latin America Caribbean, use become increasingly common many other low- middle-income countries. High-rate algal ponds (HRAP) regarded sustainable technology post-treatment UASB effluent. This study evaluated overall liquid-solid somatic coliphages, F-specific E. coli pilot-scale system comprised reactor followed by HRAPs treating real wastewater. Average log removal coliphages were 0.40 0.56 reactor, 1.15 1.70 HRAPs, respectively. The both phages was 2.06-log. Removal consistently higher. number leaving solids biomass less than 10% clarified residuals estimated to be approximately one order magnitude higher Results from this demonstrate suitability UASB-HRAP systems reduce viral bacterial indicators importance adequately pathogen before biosolids.