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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology Environation (Environmental Engineering Journal of Community Dedication)
Dienullah, R Mohammad Alghaf
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Social Sciences

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The Effect of Aeration and Chlorella vulgaris Initial Cell Density on Mercury Removal Dienullah, R Mohammad Alghaf; Titah, Harmin Sulistiyaning; Pratikno, Herman; Purwanti, Ipung Fitri; Wardhani, Widhowati Kesoema
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 20, No 1 (2025): May 2025
Publisher : :Agency for Marine and Fisheries Research and Human Resources, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.921

Abstract

Research on Chlorella vulgaris is vital due to its rapid growth and versatile habitat adaptability. C. vulgaris is a fast-growing green microalga used for phycoremediation of heavy metals such as mercury which is usually found in gold mining wastewater. This research aims to determine the best mercury removal efficiency with variations in aeration rate, medium concentration, and C. vulgaris inoculum concentration. This research was conducted by cultivating C. vulgaris and examining its response to various parameters in an artificial mercury (II) chloride (HgCl2) solution. Moreover, other parameters such as cell density, pH, temperature, bicarbonate, and dissolved oxygen were monitored over a seven-day experimental period. The highest removal efficiency (61.34%) at a mercury concentration of 0.3 mg/L was found in the variant with a walne medium dose of 1 mL/L, inoculum concentration of 10%, and aeration rate of 3 L/min. This study confirmed the potential of C. vulgaris as an effective agent for heavy metal removal, particularly mercury, and contributed to bioremediation.
INOVASI PENGOLAHAN SAMPAH DAUN DAN TIKET KARCIS MENJADI BRIKET BERBASIS ZERO WASTE DI UNIVERSITAS PEMBANGUNAN NASIONAL "VETERAN" JAWA TIMUR Habibie, Hikmal Akbar; Niam, Muhammad Dhawin; Khoiriyah, Nur Mambaul; Rahmaningtyas, Rena; Sihombing, Adelia Triani; Dienullah, R Mohammad Alghaf
Environmental Engineering Journal of Community Dedication Vol. 5 No. 2 (2025): Jurnal Environation
Publisher : Teknik Lingkungan Universitas Pembangunan Nasional "Veteran" Jawa Timur

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Abstract

Pengelolaan sampah merupakan tantangan penting di lingkungan perguruan tinggi dalam upaya mewujudkan prinsip pembangunan berkelanjutan dan zero waste campus. Universitas Pembangunan Nasional “Veteran” Jawa Timur menghasilkan limbah organik dan anorganik yang dominan berupa sampah daun dan tiket karcis parkir yang belum dimanfaatkan secara optimal. Kegiatan pengabdian ini bertujuan untuk mengonversi kedua jenis limbah tersebut menjadi briket sebagai energi alternatif ramah lingkungan serta meningkatkan kemampuan panitia pengabdian dalam pengolahan sampah berbasis waste-to-energy. Metode yang digunakan adalah workshop internal berbasis training by doing yang meliputi tahapan pengumpulan bahan, pencacahan, pencampuran, pencetakan, dan curing briket. Hasil kegiatan menunjukkan bahwa briket yang dihasilkan memiliki bentuk fisik yang baik, menyala dengan stabil, dan berpotensi digunakan sebagai bahan bakar skala kecil. Berdasarkan evaluasi, program ini berhasil meningkatkan pemahaman teknis peserta sekaligus memberikan solusi aplikatif untuk pengurangan volume sampah di lingkungan kampus. Kegiatan ini direkomendasikan untuk dikembangkan pada skala yang lebih luas dan didukung dengan uji laboratorium guna meningkatkan kualitas briket sebagai energi terbarukan.
OPTIMALISASI PEMANFAATAN LIMBAH ORGANIK KANTIN KAMPUS MELALUI PRODUKSI ECO-ENZYME DENGAN PENAMBAHAN RAGI SEBAGAI AKTIVATOR FERMENTASI Habibie, Hikmal Akbar; Baihaqi, Ahmad Yasin; Azola, Khalisa Zahrani; Putri, Reva Aulia; Dienullah, R Mohammad Alghaf
Environmental Engineering Journal of Community Dedication Vol. 5 No. 2 (2025): Jurnal Environation
Publisher : Teknik Lingkungan Universitas Pembangunan Nasional "Veteran" Jawa Timur

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Abstract

Pengelolaan limbah organik di lingkungan perguruan tinggi merupakan bagian penting dalam upaya mewujudkan Green and Sustainable University. Aktivitas kantin Universitas Pembangunan Nasional “Veteran” Jawa Timur menghasilkan timbulan limbah organik harian yang apabila tidak dikelola dengan baik berpotensi menimbulkan pencemaran lingkungan. Kegiatan pengabdian kepada masyarakat ini bertujuan meningkatkan kapasitas sivitas akademika dalam pengelolaan limbah organik melalui produksi eco-enzyme berbasis ragi sebagai inovasi percepatan proses fermentasi. Metode pelaksanaan melibatkan workshop berbasis training by doing yang mencakup edukasi konsep dan praktik langsung produksi eco-enzyme melalui tahapan pengumpulan sampah organik, pemotongan bahan, formulasi campuran fermentasi, penambahan ragi sebagai aktivator, hingga pemantauan hasil fermentasi. Evaluasi pelaksanaan dilakukan melalui observasi peningkatan kompetensi peserta dan kualitas produk eco-enzyme yang dihasilkan. Hasil kegiatan menunjukkan bahwa peserta mampu menerapkan teknik produksi eco-enzyme secara mandiri, serta penambahan ragi terbukti mempercepat proses fermentasi dan meningkatkan karakteristik awal produk, meliputi aroma yang lebih stabil dan tingkat kejernihan yang lebih baik dibandingkan fermentasi konvensional.
Batik Wastewater Treatment: Performance of Combination PAC with Hydrocyclone Separation Rosariawari, Firra; Amalia, Aussie; Dienullah, R Mohammad Alghaf; Fauzianto, Fajar Shufi; Rizqa, Fauzul
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 23, No 1 (2026): March 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v23i1.188-202

Abstract

Batik wastewater contains high levels of total suspended solids (TSS) and turbidity, making it difficult to decompose naturally. To prevent environmental pollution, this study investigated a treatment method that combined coagulation in a mixing tank and flocculation using a hydrocyclone. Polyaluminum chloride (PAC) was used as the coagulant. The coagulation process was tested at stirring speeds of 100–140 rpm and coagulant doses of 150–300 mg/L. The results showed that a coagulant dose of 300 mg/L and a stirring speed of 140 rpm achieved the highest removal efficiencies: 95.45% for TSS and 95.24% for turbidity. A two-way analysis of variance (ANOVA) confirmed that the coagulant dose significantly affected removal efficiency (p=0.049), whereas the stirring speed did not have a significant effect (p=0.77). Furthermore, particle size analysis (PSA) and zeta potential tests indicated that the PAC coagulant successfully destabilized the suspension in the wastewater, leading to the formation of large aggregates and accelerating the separation process. Overall, these results indicate that combining a coagulation mixing tank with a hydrocyclone flocculation unit offers an efficient and rapid solution for treating batik wastewater.  
Co-Authors Aussie Amalia Azola, Khalisa Zahrani Baihaqi, Ahmad Yasin Fauzianto, Fajar Shufi Habibie, Hikmal Akbar Herman Pratikno, Herman Ipung Fitri Purwanti Khoiriyah, Nur Mambaul Niam, Muhammad Dhawin Putri, Reva Aulia Rahmaningtyas, Rena Rizqa, Fauzul Rosariawari, Firra Sihombing, Adelia Triani Titah, Harmin Sulistiyaning Wardhani, Widhowati Kesoema