Development of a sixth-generation down-flow hanging sponge (DHS) reactor using rigid sponge media for post-treatment of UASB treating municipal sewage

Onodera, Takashi; Tandukar, Madan; Sugiyana, Doni; Uemura, Shigeki; Ohashi, Akiyoshi; Harada, Hideki

doi:10.1016/j.biortech.2013.10.106

Cited by 77 publications

(39 citation statements)

References 25 publications

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“…The basic principle of the DHS system is somewhat similar to the trickling filter (TF) process in which the wastewater is supplied at the top of supporting media, and trickles down toward bottom part of the reactor [12]. However, the main difference in the DHS system is that use polyurethane sponge (sponge) as supporting media instead of rock or hard-plastic material [13] [14]. During this down-flow process (Fig.1) the wastewater passes through the sponges since these sponge carriers are exposed to air and are not submerged in wastewater, oxygen can easily be diffused from the atmosphere through natural ventilation, and thus obviates the need for external aerating device [10] [15].…”

Section: Down Flow Hanging Sponge (Dhs) Reactormentioning

confidence: 99%

“…During this down-flow process (Fig.1) the wastewater passes through the sponges since these sponge carriers are exposed to air and are not submerged in wastewater, oxygen can easily be diffused from the atmosphere through natural ventilation, and thus obviates the need for external aerating device [10] [15]. The sponge has void space more than 90% [16], and thus created a large surface area which provides an excellent site for microorganisms growth [14][10]. In the conventional TF microorganisms grow only on the surface of supporting media to form a biofilm.…”

Section: Down Flow Hanging Sponge (Dhs) Reactormentioning

confidence: 99%

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Downflow Hanging Sponge (DHS) Reactor for Wastewater Treatment - A Short Review

Nurmiyanto

Ohashi

2019

MATEC Web Conf.

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A combination of upflow anaerobic sludge blanket (UASB) and downflow hanging sponge (DHS) reactor has emerged as an interesting alternative wastewater treatment process. The combined system not only exhibited good organic removal performance in pilot scale experiment, moreover, several studies in the last decades also showed the good efficiency and robustness of DHS reactor in full-scale operation for wastewater treatment. This paper provides a review on the basic concept, historical process development and application of the DHS reactor for wastewater treatment. Over twenty-year development of DHS technology suggests that DHS reactor had become a viable alternative not only solving the sanitation problems in developing countries but also great further potential development in the field of resources recovery technologies from wastewater.

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Section: Down Flow Hanging Sponge (Dhs) Reactormentioning

confidence: 99%

Section: Down Flow Hanging Sponge (Dhs) Reactormentioning

confidence: 99%

Downflow Hanging Sponge (DHS) Reactor for Wastewater Treatment - A Short Review

Nurmiyanto

Ohashi

2019

MATEC Web Conf.

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“…Sedangkan pada bagian atas bioreaktor menunjukkan bahwa sangat efisien dalam menahan padatan dan diikuti biodegradasi oleh bakteri heterotrof. Fenomena ini juga diperoleh oleh peneliti lain (Araki et al, 1999;Machdar et al, 2000;Onodera et al, 2014;Tandukar et al, 2006 …”

Section: Profilunclassified

Unjuk Kerja Down-Flow Hanging Sponge (DHS) Bioreaktor sebagai Secondary Treatment untuk Pengolahan Limbah Domestik

et al. 2017

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ABSTRAKPencemaran air limbah akan terus bertambah dengan meningkatnya jumlah penduduk dan aktifitas masyarakat. Berbagai proses telah diaplikasikan untuk pengolahan limbah domestik, tetapi umumnya proses-proses tersebut membutuhkan biaya operasi dan perawatan yang relatif mahal. Downflow Hanging Sponge (DHS) telah diusulkan sebagai pemecahan persoalan penanganan limbah domestik untuk negara-negara berkembang. DHS bioreaktor adalah pengolahan limbah secara biologis yang tidak membutuhkan aerator dan mudah dalam pengoperasian. Penelitian ini bertujuan untuk mengevaluasi bioreaktor DHS sehingga dapat diterapkan di Indonesia. Bioreakor DHS dioperasikan dengan hydraulic retention time (HRT) 4 jam. Hasil penelitian menunjukkan DHS bioreaktor mampu mengurangi hingga 34% Chemical Oxygen Demand (COD) total, 33% soluble Chemical Oxygen Demand (COD), 80% Biological Oxygen Demand (BOD) total, dan 65% ammonia. Kata kunci: Limbah domestik, down-flow hanging sponge (DHS), hydraulic retention time (HRT) ABSTRACT

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“…The DHS reactor is a novel trickling filter using a sponge media as the sludge carrier in which bacteria and macrofauna are present (Kubota et al, 2014;Onodera et al, 2013). The DHS reactor in combination with the UASB has been verified as a reliable and efficient system for industrial and municipal wastewater treatment for over a decade (Machdar et al, 2000;Onodera et al, 2014;Tandukar et al, 2007). Because of the plug flow regime, the characteristics of the retained sludge and microbial community structure vary throughout the reactor height (Kubota et al, 2014;Onodera et al, 2013), making the DHS reactor a suitable model for application of stable isotope analysis.…”

Section: Introductionmentioning

confidence: 96%