Effect of NaOH on biogas production under SSAD conditions along with kinetics studies by Hashfi Hawali Abdul Matin, Hadiyanto Hadiyanto

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Pepe Boyolali River: Analysis of Water Quality Using the Pollution Index Method by Frista Ananda Rizky, Hashfi Hawali Abdul Matin

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Effect of Pretreatment and C/N Ratio in Anaerobic Digestion on Biogas Production from Coffee Grounds and Rice Husk Mixtures by Budiyono Budiyono, Hashfi Hawali Abdul Matin, Ihzani Yulistra Yasmin, Iwang Septo Priogo

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Vegetation Density Analysis in Padalarang Bandung Regency Using NDVI Method on Landsat 8 Satellite by Ratna Widyaningtyas, Mini Ambarwati Kusuma Dewi, Maulyda Shofa Azizia, Hashfi Hawali Abdul Matin

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Plastic Management on the Kelapa Island, Indonesia: Analysis of Community Perception and Participation by Awaluddin Hidayat Ramli Inaku, Hadiyanto Hadiyanto, Henna Rya Abdurachim, Hashfi Hawali Abdul Matin

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Solid Medical Waste Management of Hazardous and Toxic at UNS Hospital Surakarta by Hashfi Hawali Abdul Matin, Purwono Purwono, Achmad Chalid Afif Alfajrin, Awaluddin Hidayat Ramli Inaku

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Changes in the Distribution of Air Pollutants (Carbon Monoxide) during the Control of the COVID-19 Pandemic in Jakarta, Surabaya, and Yogyakarta, Indonesia by Sapta Suhardono, Iva Yenis Septiariva, Siti Rachmawati, Hashfi Hawali Abdul Matin, Niswatul Qona'ah, Bayu Nirwana, I Wayan Koko Suryawan, Mega Mutiara Sari, Wisnu Prayogo

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