The purpose of this research is to investigate wastewater treatment with ozone pretreatment and post-treatment integrated with Moving Bed Biofilm Reactor (MBBR). Ozonation as a pre-treatment served to increase the Biochemical Oxygen Demand (BOD)/Chemical Oxygen Demand (COD) ratio while as a post-treatment to remove the remaining organic residues. Ozone doses were 1 mg/min, 4 mg/min, 20 mg/min, and 40 mg/min. In the pre-treatment, ozone produced a BOD/COD value of 0.68. The MBBR process had a COD and color removal efficiency of 68.89% and 67%, respectively. In the MBBR process without ozone pre-treatment, the efficiency of COD and color removal were 79.31% and 64.7%, respectively. The effluent treatment results from MBBR were then processed with ozone and showed the highest COD and color removal results of 76.8% and 99%, respectively. In this study, the processing with ozone as post-treatment was better than the pre-treatment.
Reactive Black 5 (RB5) is one of the dyes used in textile industries in Indonesia. However, the high color content can interferewith the condition of water bodies if not treated. This waste treatment process is usually treated with biological treatmentprocesses. Biological processing often used is the MBBR unit and activated sludge. This study aims to determine the RB5dye’s bio-sorption efficiency using MBBR processing and activated sludge. MBBR processing and activated sludge consistof seeding, acclimatization, and running stages. This research was carried out using a real textile wastewater approach byadding 100 mg/L RB5 and adding 1000 mg/L starch solution. The processing results of the seeding stage indicate increasingin biomass. The acclimatization stage with 50% and 75% of wastewater indicates increased biomass and color removal.The RB5 color removal efficiency results in the MBBR unit and activated sludge show 41% and 84% values. The MBBRprocessing shows fluctuations each time where the desorption process occurs in the color removal. For this reason, the ozonepre-treatment process is conducted in the MBBR unit. The integrated pre-treatment with MBBR results show the samefluctuation as the previous processing with a color removal efficiency of 43% with a color removal efficiency of 43%.
Implikasi Likuiditas Perusahaan bagi Opinion Shopping. Penelitian ini menguji pengaruh opinion shopping terhadap biaya audit abnormal, likuiditas, profitabilitas, dan lamanya perikatan audit. Pene litian ini menggunakan metode regresi logistik terhadap 40 perusahaan terbuka sektor manufaktur di Indonesia. Hasil analisis mununjukkan bahwa perusahaan mengalami kendala jika kurang likuid karena tidak dapat memenuhi kompensasi bagi stakeholder kreditur. Hal ini diyakini memperkuat probabilitas manajemen untuk melakukan opinion shopping demi mendapat opini wajar tanpa pengecualian. Oleh karena itu, akun tan profesional harus memegang teguh kode etik profesi untuk menjaga integritas dengan mengeluarkan opini sesuai kondisi yang sebenarnya.
COVID-19 dapat menginfeksi korban kecelakaan lalu lintas. Kewaspadaan dokter dan
petugas kesehatan untuk selalu berhati-hati menangani pasien diperlukan pada masa pandemi
ini. Peningkatan kewaspadaan dilakukan dengan screening awal ketika pasien akan masuk ke
rumah sakit. Dilaporkan sebuah kasus cedera multipel akibat kecelakaan lalu lintas pada
seorang laki-laki berumur 19 tahun. Kecelakaan yang terjadi menyebabkan dua orang
penumpang yang duduk di barisan depan dan pengemudi terhempas keluar mobil dan
ditemukan pada jarak 2 meter di belakang mobil. Benturan kuat yang terjadi saat kecelakaan
menyebabkan terjadinya fraktur pada beberapa tempat seperti pada tulang hidung dan tulang
bahu kanan. Pada saat akan dirawat di rumah sakit, pasien diperika swab RT-PCR dengan
hasil positif COVID-19 dan disiolasi di ruangan new emerging dan re-emerging (PINERE).
Penumpang lain terkonfirmasi positif COVID-19 sementara pengemudi negatif COVID-19.
Pemeriksaan forensik klinik dilakukan untuk penerbitan visum et repertum. Pemeriksaan
forensik klinik dilakukan cara pemeriksa dan korban tidak berhadapan langsung melainkan
dibatasi dengan pembatas kaca dalam ruangan berbeda. Pemeriksaan forensik klinik pada
korban yang menderita COVID-19 dilakukan dengan prinsip meminimalisir paparan infeksi
COVID-19 di masa pandemi. Pemeriksaan forensik klinik pada korban kecelakaan lalu lintas
yang terinfeksi virus COVID-19 dapat dilakukan dengan memodifikasi pemeriksaan sehingga
pemeriksa terlindungi dengan tetap menjalankan prinsip-prinsip pembuktian medikolegal.
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