Treatment of hospital waste water by ozone technology

Dianawati, Rina Indah; Wahyuningsih, Nur Endah; Nur, Muhammad

doi:10.1088/1742-6596/1025/1/012013

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…Thus, the longer the exposure time of microorganisms to ozone, the greater the decrease in microbial load [24,33] . Studies point to the good efficiency of disinfection of effluents with ozone at low doses transferred and very short contact time [3,4,31,32] . Bustos et al [34] evaluated the application of ozone and UV radiation in the disinfection and oxidation of the organic matter of an effluent and verified that total coliforms showed higher inactivation rates than fecal coliforms in all pH values tested, but the lowest bacterial inactivation was observed at pH 7.…”

Section: Resultsmentioning

confidence: 99%

“…Currently there is growing interest in the evaluation of ozone efficiency, in the oxidation of microorganic pollutants present in hospital effluents, since conventional treatment is of high cost, a large area is required, long time and the final result leaves a new residue known as iodine. While the ozonization of hospital effluents is a new technology, more efficient, less costly and does not generate residues harmful to the environment and human and animal health [3,6,18,19] . Silva [35] states that the use of ozone can also increase the concentration of oxygen in water, reduce organic matter, oxidize ammonia, remove color, nutrients and suspended solids.…”

Section: Resultsmentioning

confidence: 99%

“…Health services stand out for the production of relevant environmental impacts due to the complexity and breadth of medical-hospital activities, which produce a diversity of chemical, pharmaceutical and infectious residues, constituting important sources of contamination for the internal and external population of the hospital environment [1][2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

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Hospital effluent care with ozone for inactivation of potentially pathogenic bacteria

Oliveira

Ramos

2022

Int J Innov Educ Res

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Hospital effluents are characterized as possible vehicles for the dissemination of numerous pathogenic microorganisms and other contaminants and, when left untreated, represent a potential risk to man and the environment. The objective of this research was to evaluate the presence of arable pathogenic microorganisms present and to verify the efficacy of ozone in the disinfection of effluents from a public hospital in the city of Uberlandia-MG. Hospital effluent collections were performed at two points, with a distance of 200 m: the first point, from the Emergency Room, wards, intensive care unit, surgical center and laboratory and the second point, hemodialysis, kitchen, laundry and clothing. Sampling was performed for three months. The samples were evaluated for the presence of total mesophiles, total and thermotolerant coliforms, Escherichia coli and Salmonella spp. The effluent was treated with ozone for different periods of time. The presence of mesophiles, coliforms, Escherichia coli and Salmonella spp. was verified in both effluents and in all months of evaluation. Ozone was effective in decontamination of hospital effluent, requiring 20 minutes to eliminate bacterial load.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hospital effluent care with ozone for inactivation of potentially pathogenic bacteria

Oliveira

Ramos

2022

Int J Innov Educ Res

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“…Setelah waktu kontak ditingkatkan menjadi 20 menit, terlihat bahwa penyisihan menurun yang juga linear terhadap peningkatan kekeruhan. Variasi peningkatan laju alir untuk memperbanyak konsentrasi ozon terlarut dapat memecah koloid menjadi flok-flok kecil (diklasifikasikan sebagai TSS) (Dianawati et al, 2017). Selanjutnya ketika waktu kontak diperlama menjadi 30 menit, penyisihan TSS berlangsung cukup baik.…”

Section: Gambar 6 Perubahan Tss Setelah Proses Ozonasiunclassified

Preozonasi Sebagai Pretreatment Air Baku: Studi Kasus Instalasi Pengolahan Air Minum (IPAM) Ngagel I Kota Surabaya

Ibnu Luthfi Saud,

Nurhayati

2023

envirotek

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Semakin menurunnya kualitas air sungai sebagai air baku air minum membawa tantangan tersendiri bagi PDAM agar instalasi pengolahan air (IPA) yang ada tetap bisa mengolah air dengan baik. Salah satu yang dapat dilakukan adalah dengan melakukan pretreatment sebelum air diolah di IPA. Salah satu teknologi pretreatment yang dapat diterapkan adalah preoksidasi dengan menggunakan ozon yang disebut dengan preozonasi. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan preozonasi, sebagai bentuk pretreatment air baku, terhadap perubahan parameter pH, warna, kekeruhan, TSS, COD, dan amonia. Metedologi dalam penelitian ini adalah dengan menginjeksi ozon ke dalam sampel air (effluent bak prasedimentasi IPAM Ngagel I) dengan variasi laju alir (1, 2, dan 3 L/min) serta variasi waktu kontak (10, 20, dan 30 menit). Berdasarkan penelitian yang dilakukan, didapatkan bahwa preozonasi mampu menyisihkan kekeruhan (3%), warna (4%), TSS (0%), COD (26%), dan amonia (35%) serta pH yang sedikit meningkat (mendekati kondisi netral). Penyisihan tersebut didapatkan dengan cukup menggunakan variasi laju alir sebesar 2,6 L/min dan waktu kontak selama 30 menit. Preozonasi signifikan dalam menyisihkan parameter kimia (COD dan amonia) dan tidak terlalu berpengaruh terhadap parameter fisik (kekeruhan, warna, dan TSS). Dengan penambahan preozonasi ini diharapkan dapat meringankan beban pengolahan selanjutnya yaitu unit koagulasi dan flokulasi sehingga dapat mengurangi konsumsi koagulan

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“…The decolorisation can reach more than 80%, and at the same time, ozone decolorisation can effectively reduce the COD value of wastewater 8 . In addition, to improve the efficiency of ozone decolorisation, many reports combine ozone with other methods, 17,19,20 such as photo‐ozonation, because ozone molecules can absorb ultraviolet (UV) radiation with wavelengths below 320 nm, resulting in the degradation of ozone and generation of atomic oxygen. Ozone can produce more hydroxyl radicals through subsequent reactions to promote the degradation of dyes 18 .…”

Section: Introductionmentioning

confidence: 99%

Mechanism and application of ozone fading: Oxidative decolorisation of disperse dyes and waste‐dyed polyester fabrics

Lou

Ren

Yuan

et al. 2022

Coloration Technology

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As the most common synthetic fibre, polyester has consistently been in high demand and usage, but its recycling has always been a problem for the textile industry. The decolorisation of dyed polyester is the key to expanding its recycling use, and there is no rapid, effective and simple decolorisation method. In this study, ozone was used to decolorise dispersed dyes developed for polyester. Ozone was effective in decolorising CI Disperse Orange 30 and CI Disperse Blue 60, and the process was extended to the decolorisation of dyed polyester fabric. Based on single factor analysis, the optimum decolorisation technological conditions were: an ozone feed rate of 130 mg L−1 min−1, treatment time of 2 hours, wet pick‐up of 100% and pH value of 3, with which the decolorisation rate and colour difference values could exceed 45% and 6%, respectively. The changes in dye structure during the process of ozone decolorisation were analysed using scanning electron microscopy, X‐ray diffraction and Fourier Transform–infrared spectroscopy, and the mechanism of ozone decolorisation was also investigated. The results showed that the crystallinity decreased from 41.18% to 36.30% with a strength retention rate of above 80%, and demonstrated that ozone can be used on polyester fabric and dye simultaneously. The aim of entering the fibre was achieved by etching the polyester and decolorisation was achieved by oxidising the chromaticity groups.

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Treatment of hospital waste water by ozone technology

Cited by 6 publications

References 2 publications

Hospital effluent care with ozone for inactivation of potentially pathogenic bacteria

Hospital effluent care with ozone for inactivation of potentially pathogenic bacteria

Preozonasi Sebagai Pretreatment Air Baku: Studi Kasus Instalasi Pengolahan Air Minum (IPAM) Ngagel I Kota Surabaya

Mechanism and application of ozone fading: Oxidative decolorisation of disperse dyes and waste‐dyed polyester fabrics

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