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All Journal Prosiding Seminar Nasional Sains dan Teknologi Terapan MANDALA WIDYA: Jurnal Ilmu Pendidikan
Tri Suryanti
Faculty of Math. and Natural Science-State University of Jakarta Jl. Rawamangun Muka, Jakarta 13220, Indonesia
Computer Science & IT Education Languange, Linguistic, Communication & Media Mathematics Other

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Penurunan Kadar Tss Dan Cod Pada Limbah Cair Industri Batik Dengan Metode Gabungan Koagulasi Dan Adsorbsi Suryanti, Tri; Ambarwati, Diah Ayu; Udyani, Kartika; Purwaningsih, Dian Yanuarita
Prosiding Seminar Nasional Sains dan Teknologi Terapan 2019: Menuju Penerapan Teknologi Terbarukan pada Industri 4.0: Perubahan Industri dan Transformasi P
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.539 KB)

Abstract

Salah satu industri yang menghasilkan limbah cair adalah industri batik. Dalam limbah cair industri batikterdapat kandungan berbahaya yang menyebabkan pencemaran lingkungan seperti logam berat, sehinggaperlu diolah agar aman untuk dibuang ke lingkungan. Pengolahan limbah cair industri batik dapat dilakukandengan metode gabungan koagulasi dan adsorbsi. Tujuan dari penelitian ini adalah untuk mengetahuipengaruh penambahan koagulan biji kelor terhadap penurunan COD (Chemical Oxygen Demand) dan TSS(Total Suspended Solid). Penelitian ini dimulai dengan menentukan koagulan terbaik antara koagulan bijikelor dan ekstrak biji kelor. Setelah itu koagulan terbaik digunakan untuk proses koagulasi dengan variabel60 gr, 80 gr, 100 gr, 120 gr, dan 140 gr. Selanjutnya hasil koagulasi diadsorbsi menggunakan karbon aktifsetinggi 25 cm. Pada lapisan bawah kolom digunakan zeolit setinggi 15 cm, kemudian pada atas kolom diisiijuk 15 cm. Setelah adsorbsi selesai sampel limbah yang sudah di-treatment kemudian diuji COD dan TSS.Pada hasil penelitian ini didapat % removal COD dan TSS maksimal pada variabel massa koagulan 60 gr,pada variabel tersebut dihasilkan % removal COD sebesar 85,95% dan % removal TSS sebesar 81,41%
Integrasi Teknologi Digital dalam Pembelajaran Abad 21: Tinjauan Literatur tentang Penerapan Learning Management System (LMS) di Sekolah Menengah Suryanti, Tri; Utari, Retno
MANDALA WIDYA: Jurnal Ilmu Pendidikan Vol. 1 No. 1: MANDALA WIDYA: Jurnal Ilmu Pendidikan, Agustus 2025
Publisher : CV. Global Cendekia Inti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71094/mandalawidya.v1i1.12

Abstract

The integration of digital technology into 21st-century learning demands a paradigm shift in education, particularly at the secondary school level, where the use of Learning Management Systems (LMS) is becoming increasingly central. This article presents a literature review that aims to analyze the implementation of LMS in secondary education by focusing on three key aspects: effectiveness, challenges, and pedagogical integration models. The review is conducted through a systematic examination of recent international and national publications addressing LMS use within the context of 21st-century learning. Findings indicate that LMS significantly contributes to enhancing students’ digital competencies, improving the effectiveness of online learning, and fostering 21st-century skills such as collaboration, communication, critical thinking, and creativity. However, its implementation continues to face various challenges, including limited digital literacy among teachers, varying levels of student readiness, infrastructure constraints, resistance to change, and difficulties in embedding LMS into innovative pedagogical strategies. To address these barriers, the study recommends an integrative approach that incorporates the TPACK framework, the SAMR model, and adaptive digital competencies. With the support of appropriate policies, teacher training, and effective managerial strategies, LMS holds strong potential as a transformative tool for building an inclusive, sustainable, and future-oriented 21st-century education ecosystem.
Co-Authors Ambarwati, Diah Ayu Dian Yanuarita Purwaningsih Kartika Udyani Utari, Retno