1997
DOI: 10.2166/wst.1997.0447
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A novel and cost-effective sewage treatment system consisting of UASB pre-treatment and aerobic post-treatment units for developing countries

Abstract: A novel sewage treatment system was proposed, which consists of a UASB anaerobic pre-treatment unit and the following DHS (downflow hanging sponge-cubes) aerobic post-treatment unit, as a low-cost and easy-maintenance process for developing countries. Over six months experiment by feeding sewage our proposed system achieved 94% of total-COD removal, 81% of soluble-COD removal, and nearly perfect SS removal and total-BOD removal at the overall HRT of 8.3 hr (7 hr in UASB and 1.3 hr in DHS unit). Moreover, the D… Show more

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Cited by 56 publications
(43 citation statements)
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“…Much of SS was entrapped in the fiber module and provided a long SRT. The performance was similar to that of the cube-type or the curtain-type DHS reactor (Machdar, 1997, Machdar, 2000, Tandukar et al, 2005. Time course of unfiltered COD and typical DO profile along the PF-DHS reactor height are shown in Fig.…”
Section: Pf-dhs Reactor Process Performancementioning
confidence: 54%
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“…Much of SS was entrapped in the fiber module and provided a long SRT. The performance was similar to that of the cube-type or the curtain-type DHS reactor (Machdar, 1997, Machdar, 2000, Tandukar et al, 2005. Time course of unfiltered COD and typical DO profile along the PF-DHS reactor height are shown in Fig.…”
Section: Pf-dhs Reactor Process Performancementioning
confidence: 54%
“…Performance of DHS reactor depends upon the uniformity of wastewater distribution, as it enhances the contact between the substrate and the microbes (Machdar et al, 1997(Machdar et al, , 2001Tandukar et al, 2006). The tracer study for PF-DHS reactor was performed to assess the influence of the module oil palm fiber density on the module effective volume, i.e.…”
Section: Results and Discussion Preliminary Test Of Pf-dhs Reactormentioning
confidence: 99%
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“…Reaktor DHS telah dikembangkan juga oleh peneliti yang lain di Universitas Teknologi Nagaoka, Jepang sebagai alat pengolahan limbah domestik yang murah dalam biaya operasi terutama untuk negara-negara berkembang sejak tahun 1995 (Machdar et al, 2000). Penelitian bioreaktor DHS awalnya diterbitkan pada tahun 1997 oleh (Machdar et al, 1997) dan telah dieksplorasi terus menerus setiap waktu oleh banyak peneliti (Araki et al, 1999;Machdar et al, 2000;Machdar and Faisall, 2011;Tandukar et al, 2007Tandukar et al, , 2006Tandukar et al, , 2005 untuk pengolahan limbah domestik. Reaktor DHS dapat direkomendasikan sebagai teknologi yang efisien dan hemat biaya untuk pasca pengolahan air limbah kota, terutama untuk negara-negara berkembang seperti penelitian yang telah dilakukan di Mesir (Mahmoud et al, 2011) Sistem reaktor DHS memiliki performa tinggi dalam memproses lumpur aktif yang dicapai dengan stratifikasi mikroba yang berguna untuk mengurangi senyawa organik dan mengoksidasi amonia dan nitrit di dalam reaktor DHS (Kubota et al, 2013).…”
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