Abstrak PXI adalah salah satu perusahaan di Kabupaten Bekasi yang bergerak di bidang jasa layanan laboratorium. Dalam menjalankan kegiatannya, PXI menghasilkan logam arsen ke lingkungan. Keberadaan arsen di dalam air limbah PXI harus segera diselesaikan agar tidak mencemari lingkungan dan membahayakan kehidupan manusia. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dan deskriptif kuantitatif berdasarkan data hasil laboratorium menggunakan instrumen FT-IR, SEM EDX dan AAS. Tahapan penelitian terdiri dari sintesis, karakterisasi dan penggunaan adsorben alami untuk menurunkan logam arsen pada air limbah. Hasil penelitian menunjukkan bahwa penggunaan adsorben alami kitosan dan karbon aktif ampas kopi 1,4 gram dapat menghasilkan efisiensi penurunan logam arsen tertinggi sebesar 86,18% dengan konsentrasi akhir sebesar 0,79 mg/L. Namun hasil tersebut belum memenuhi baku mutu logam arsen yang ditetapkan Peraturan Menteri Lingkungan Hidup Nomor 12 Tahun 2020. Sehingga perlu dilakukan penelitian lebih lanjut untuk meningkatkan efisiensi penurunan logam arsen. Abstract PXI is one of the companies in Bekasi Regency which is engaged in laboratory services. In carrying out its activities, PXI produces arsenic metal into the environment. The presence of arsenic in PXI wastewater must be resolved immediately so as not to pollute the environment and endanger human life. The method used in this study is an experimental and quantitative descriptive method based on laboratory data using FT-IR, SEM EDX and AAS instruments. The research stages consisted of synthesis, characterization and the use of natural adsorbents to reduce arsenic metal in wastewater. The results showed that the use of chitosan natural adsorbent and 1.4 gram coffee grounds activated carbon could produce the highest arsenic metal reduction efficiency of 86.18% with a final concentration of 0.79 mg/L. However, these results do not meet the quality standard for arsenic metal as stipulated by the Regulation of the Minister of the Environment Number 12 of 2020. So it is necessary to do further research to increase the efficiency of reducing metal arsenic.
Abstrak Banyaknya usaha laundry yang membuang limbahnya secara langsung ke lingkungan sehingga mencemari badan air. Pemanfaatan biokoagulan seperti biji asam jawa dapat menjadi salah satu alternatif pengolahan air limbah. Penelitian ini bertujuan untuk mengetahui pengaruh serbuk biji asam jawa dalam menurunkan kontaminan COD, TSS, fosfat dan minyak lemak pada limbah cair laundry Taman Sentosa, Kecamatan Cikarang Selatan, Kabupaten Bekasi, Jawa Barat. Metode yang digunakan adalah eksperimen laboratorium meggunakan prinsip flokulasi koagulasi. Pada penelitian ini digunakan variasi dosis koagulan 1500 mg/L; 2500 mg/L; 3000 mg/L; 3500 mg/L dan 4000 mg/L. Hasil penelitian sebelum penambahan koagulan adalah kadar COD sebesar 3.160 mg/L, kadar TSS sebesar 703 mg/L, kadar fosfat sebesar 4,20 mg/L dan kadar minyak lemak sebesar 25,25 mg/L. Setelah penambahan koagulan serbuk biji asam jawa mampu menurunkan kadar COD dengan efisiensi penyisihan sebesar 30,75%. Sedangkan efisiensi serbuk biji asam jawa dalam menurunkan TSS sebesar -7,26%, fosfat sebesar -2,38% dan minyak dan lemak sebesar -596,63%. Berdasarkan hasil tersebut maka serbuk biji asam jawa tidak efektif untuk menurunkan kadar COD, TSS, fosfat dan minyak lemak karena belum mampu memenuhi baku mutu buangan limbah industri laundry. Abstract Many laundry businesses dispose of their waste directly into the environment, thus polluting water bodies. The use of biocoagulants such as tamarind seeds can be an alternative for wastewater treatment. This study aims to determine the effect of tamarind seed powder in reducing contaminants of COD, TSS, phosphate and fatty oil in Sentosa Park laundry wastewater, Cikarang Selatan District, Bekasi Regency, West Java. The method used is a laboratory experiment using the principle of coagulation flocculation. This study used a coagulant dose variation of 1500 mg / L; 2500 mg / L; 3000 mg / L; 3500 mg / L and 4000 mg / L. The results of the study before the addition of coagulants were COD levels of 3.160 mg / L, TSS levels of 703 mg / L, phosphate levels of 4.20 mg / L and fatty oil content of 25.25 mg / L. After the addition of coagulant tamarind seed powder, it was able to reduce COD levels with a removal efficiency of 30.75%. Meanwhile, the efficiency of tamarind seed powder in reducing TSS was -7.26%, phosphate was -2.38% and oil and fat was -596.63%. Based on these results, tamarind seed powder is not effective in reducing levels of COD, TSS, phosphate and fatty oil because it has not been able to meet the quality standards of industrial laundry waste disposal.
PT. X Indonesia (PXI) is a company engaged in laboratory services in Bekasi Regency. Based on a preliminary study, the concentration of cadmium and lead in wastewater shows that it exceeds the quality standard of PerMenLHK No. P12 of 2020. The presence of cadmium and lead in PXI's wastewater must be resolved immediately to avoid dangerous human activities and polluting the environment. The research was initiated by taking wastewater samples and synthesizing the adsorbent from the combination of chitosan and activated carbon from coffee grounds. The method used in this study is an experimental approach with quantitative descriptive methods based on laboratory data using FT-IR, SEM EDX and AAS instruments. The results showed that chitosan biosorbent and 1.4-gram coffee grounds activated carbon resulted in the highest cadmium metal reduction efficiency of 94.35% and led to a metal reduction efficiency of 90.86%. The results concluded that the adsorbent of chitosan-activated carbon coffee grounds is very effective in reducing cadmium and lead metals in the wastewater of PXI. This research needs to follow up by increasing the mass of activated carbon of coffee grounds to meet quality standards.
Aking rice is rice waste that is no longer suitable for public consumption, however, the high starch content of aking rice can be used as a raw material for making biodegradable plastics. Good biodegradable plastic made from cassava starch and rice flour, to increase its elasticity and extensibility it is necessary to add chitosan additives and glycerol plasticizers. This study aims to determine the optimum conditions for the composition of glycerol and chitosan for the physical properties of biodegradable plastics made from aking rice and tapioca starch. Biodegradable plastics in this study were made with 3 grams of aking rice flour and 7 grams of tapioka flour with the addition of variations in the composition of chitosan (3 grams, 5 grams, and 7 grams) and the addition of variations in the composition of glycerol (2 ml, 4 ml, 6 ml, and 8 ml). As a result, the highest tensile strength value at 7: 2 composition variation is 41.29 MPa, the highest elongation percentage at 3: 8 composition variation is 135.8%, the highest water resistance at 7: 8 composition variation is -206%, the highest percent water absorption and the fastest biodegradation process at a variation of the composition of 3: 2, namely 1603% and completely degraded on the 4th day.Keywords: aking rice, biodegradable plastic, chitosan, glycerol and tapioca starch.
Pemotongan jalur distribusi sampah menuju TPA merupakan salah satu upaya untuk mengolah sampah organik menjadi produk yang lebih bermanfaat. Implementasinya dapat dilakukan melalui pembuatan eco enzim yang dapat diterapkan pada pengolahan sampah organik rumah tangga. Eco enzim merupakan produk ramah lingkungan yang dapat dihasilkan dari reaksi fermentasi limbah organik dengan substrat gula merah. Eco enzim dapat dibuat dengan mencampurkan limbah organik, gula merah/molase dan air dengan perbandingan massa 3:1:10. Sampah domestik yang dihasilkan di desa Jayamukti terdiri dari sampah organik dan sampah anorganik. Sampah anorganik dikumpulkan melalui Bank sampah warga yang selanjutnya dijual ke pengepul dan penghasilannya dapat dijadikan uang kas warga di setiap RT. Sedangkan sampah organik yang dihasilkan berupa limbah sayuran dan kulit buah-buahan belum dimanfaatkan karena langsung dibuang ke tempat sampah dan diangkut oleh truk sampah. Kegiatan pengabdian ini meliputi lima tahapan yaitu tahap perencanaan pengelolaan sampah organik , Tahap koordinasi tim pengabdi dengan pihak desa Jayamukti, Sosialisasi pembuatan ecoenzim kepada Ibu-Ibu PKK Kelurahan Jayamukti, Pendampingan pembuatan ecoenzim dan Evaluasi hasil pengabdian. Kegiatan pengabdian telah dilaksanakan dengan respon yang baik dari masyarakat yaitu hasil pengisian angket kegiatan menunjukkan sebanyak 85,71% warga sangat tertarik dengan eco enzim, sebanyak 91,43% warga akan membuat eco enzim di rumah dengan memanfaatkan sampah organik yang dihasilkan, sebanyak 74,29 warga ingin mengembangkan bisnis dari produk eco enzim, sebanyak 91,43 % warga ingin memanfaatkan produk eco enzim dalam aktivitas rumah tangga dan sebanyak 85,71% warga menyatakan puas atas kegiatan sosialisasi dan pendampingan pembuatan eco enzim yang telah dilaksanakan.
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