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Effectiveness of Subsurface Flow-Wetlands to Reducing TSS Levels and Stabilizing pH in Tofu Liquid Waste Endang Srilestari; Anita Munawwaroh
Jurnal Biologi Tropis Vol. 21 No. 1 (2021): Januari - April
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v21i1.2360

Abstract

Small and medium industries are experiencing growth every year. The home industry of tofu production is one of the small and medium industries that continues to grow and develop. However, there is a problem if the tofu production waste is disposed of directly into the waters, it will cause pollution due to the deposition of organic material. The research objective was to analyze the subsurface flow-wetlands with plants namely water hyacinth, apu wood and lemna minor to reducing TSS levels and stabilizing pH. This research an experimental with treatments including SSF-Wetlands without water plants (A1), SSF-Wetlands with water hyacinth (A2), SSF-Wetlands with apu wood (A3), SSF-Wetlands with lemna minor (A4) and SSF-Wetlands with water hyacinth, and apu wood (A5). The stages of this research are the sampling stage, the SSF-Wetlands manufacturing stage, the waste treatment stage and the pH and TSS testing stages. Data were analyzed using one-way ANOVA (SPSS 20). The results showed that the liquid waste of tofu in the initial sample was acidic, namely 3.94 and the TSS level was 858 mg / L. The pH condition of the waste after processing by the quality standard.  The highest increase in pH and decrease in TSS levels in the tofu liquid waste treatment was the SSF-Wetland processing with water hyacinth plants (A2). This shows that water hyacinth plants have a greater role in neutralizing pH and can absorb the most suspended matter compared to apu wood and lemna minor plants.
Aplikasi Teori Kognitif Model Pembelajaran Konstrutivism Melalui Penerapan “Learning Cycle” dan “Map Konsep” Untuk Meningkatkan Hasil Belajar Biologi Pada Siswa Kelas VIII SMP Al-Amin Kedung Kandang Malang Endang Srilestari
Paradigma: Jurnal Filsafat, Sains, Teknologi, dan Sosial Budaya Vol 22 No 1 (2016): Paradigma: Jurnal Filsafat, Sain, Teknologi, dan Sosial Budaya
Publisher : IKIP Budi Utomo Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.718 KB) | DOI: 10.33503/paradigma.v22i1.394

Abstract

The difficulties faced by the students in the field of science studies biology that causes passivity and low impact on learning outcomes. Starting from this, the researchers would have to give an appreciation and solutions innovative learning model through the application of the application of "learning Cycle and Folder Concept", where learners are given the freedom as much as possible to create a map of the mind / concept that can connect and relate the material to be learned , The purpose of this study was to determine how the application of learning models LC (learning cycle) and map the concept of biology to improve learning outcomes. The approach used is classroom action research (PTK). Subjects were students of class VIII SMP Al-Amin Kedung Kandang Malang, totaling 42 students. The research was August 3 until 3 November 2015. The results of the research and data analysis Frequency learning outcomes of students in the first cycle was 69.52 with a percentage of 38.10%, the second cycle frequency of the learning outcomes at 78.92 with a percentage of 80.95% , -rata Average test scores of students in pre-cycle is 65.24, then rose to 69.52 in the first cycle, and reached 78.92 in Cycle II. Percentage completeness of classical study on pre Cycle only further increased 26.19% 38.10% in Cycle I, and the percentage of completeness of classical study in Cycle II reached 80.95%. The conclusion that the application of the learning model application "learning cycle and folders concept" can improve learning outcomes biology class VIII SMP Al-Amin Kedung Kandang Malang.