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All Journal Infotekmesin Jurnal Pengendalian Pencemaran Lingkungan (JPPL)
Sukmawati
Politeknik Negeri Cilacap
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Engineering Environmental Science Mechanical Engineering

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Analisis Pupuk Organik Cair Limbah Industri Tahu dan Air Cucian Beras Sukmawati; Sufi Ainun Nisa; Ardian Desta Pratama; Fadli Nur Fauzi
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 4 No. 1 (2022): JPPL, Maret 2022
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v4i1.1459

Abstract

Domestic waste contains good organic matter for plant growth. One of the domestic wastes owned by each house is rice washing water. In addition, the tofu industry is also widely found in Indonesia, one of which is Cilacap City. The content of organic matter possessed by the two wastes is a source of plants. To reduce the environment, this waste can be used as raw material for making liquid organic fertilizer (POC). In addition to being environmentally friendly, the raw materials used are also easy to find. This study aims to analyze pH, temperature and levels of C- Organic in liquid organic fertilizer from tofu industrial waste and rice washing water. The manufacture of liquid fertilizer is carried out using the anaerobic method, which utilizes bacteria that are active without oxygen through a fermentation process for 14 days. To determine the effect of adding EM4 and molasses, compositional variations were carried out on samples of liquid fertilizer, namely KO, P1, P2, and P3 with molasses volume sequentially 0 grams, 5 grams, 5 grams, 10 grams. Meanwhile, the volume of EM4 added sequentially is 0%, 5%, 10% and 5%. Measurements of pH and temperature were carried out every 4 days, but measurements of C- Organic were carried out at the beginning and end of the mini-research. The final pH of POC was in accordance with quality standards with KO which is 4.5 and P1, P2 and P3 which are 4. The final temperature of KO samples was 29.5oC, P1 29oC, P2 and P3 28.5oC. The highest organic-C content was owned by the knockout sample, which was 0.00297. All samples in this mini research are not included in liquid organic fertilizer (POC) but can be classified as nutrients for soil improvement.
Analisis Pengaruh Suhu Ekstrusi dan Merek Produk terhadap Kualitas Biji Plastik Daur Ulang Limbah Botol Plastik Polyethylene Terephtalate (PET) Sukmawati; Theresia E.P.S. Rahayu; Oto Prasadi
Infotekmesin Vol 17 No 1 (2026): Infotekmesin: Januari 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v17i1.3063

Abstract

Recycling plastic waste, especially Polyethylene Terephtalate (PET), into plastic pellets has great potential for producing environmentally friendly products. This study aims to recycle plastic waste from used mineral water bottles into plastic pellets using the pelletizing method, or the process of molding a material into pellets, with the independent variables being the brand of PET plastic bottle waste and temperature, and to determine their effect on the quality of the recycled plastic pellets produced. The quality parameters tested included moisture content, bulk density, total heavy metals Pb, PVC contamination, other contaminants, tensile strength, shape, color, and toxicity (LC50). The results showed that all parameters met the SNI 8424:2017 quality standards and had a fairly uniform color in the V120 variable, while in V135, only PVC contamination did not meet the standards, but for both variations, the shape was not uniform. The 72-hour LC50 test on all variations with a concentration of 6.5 kg/m3 showed low toxicity as it resulted in zero fish mortality.
Co-Authors Ardian Desta Pratama Fadli Nur Fauzi Oto Prasadi Sufi Ainun Nisa Theresia E.P.S. Rahayu