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Articles 6 Documents

Search results for , issue "Vol 8, No 1 (2020)" : 6 Documents clear

Correlation of Heat Stress to Hydration Status of Workers at Weaving Section of Tekstile Industries Danang Adi Prayitno; Siti Rachmawati; Maria Paskanita Widjan; Hashfi Hawali Abdul Matin
Waste Technology Vol 8, No 1 (2020)
Publisher : Diponegoro University

Abstract.PT X is a company plastics and textiles that has 3 section of the production process, one of which is the weaving section. During work, workers are exposed to heat stress which can affect hydration status. The objective of the research is to investigate the correlation of heat stress to hydration status of the workers at weaving section PT X. This research used the observational analytical research method with cross sectional approach. Its population was all of morning work with 60 workers at weaving section PT Kusuma Mulia Plasindo Infitex Klaten. Proposive sampling was used to determine its samples. They consisted of 37 workers. The heat stress was measured with Heat Stress Area and hydration status using urine specific gravity laboratory tests conducted by Solo Laboratory. The data were processed and analyzed by using the Spearman test. The result of this research show that the heat stress had a correlation with hydration status as indicated by the p-value = 0,001.

Utilization of Rambutan (Naphelium lappaceum L) Peel’s Waste is Becoming More Useful As a Natural Dye of Fabrics Heny Kusumayanti; Vita Paramita; Rizka Amalia; Wahyuningsih Wahyuningsih
Waste Technology Vol 8, No 1 (2020)
Publisher : Diponegoro University

The demand to find an alternatives source of fabric dyes is increasing nowadays, specifically for natural dye. Applying natural dye in fabric, giving important effect of more environmentally friendly than synthetic dye. One of the natural colors that can be used is Naphelium lappaceum L peel’s waste. The method used is dyeing a cloth with extract of Naphelium lappaceum L peels. Variables applied are extract concentration, type of fixation and concentration of fixation. The results of dyeing cotton fabric using Naphelium lappaceum L peel extract show that the use of alum solution as fixation materials provides brown light color, yellowish brown for lime, and blackish grey for ferro sulphate. The different extract concentration resulted significant effect on the colour radiance on fabric.

The Effect of C / N Ratio and Pretreatment in Making Biogas from Tea Waste and Cow Manure in Liquid State Anaerobic Co-Digestion Ghalih Hakiki Kavisa; Nurlita Sari; Hashfi Hawali Abdul Matin; Budiyono Budiyono
Waste Technology Vol 8, No 1 (2020)
Publisher : Diponegoro University

Energy problems in Indonesia are issues that are not easy to solve. If the energy needs dominated by BBM continue to increase without any changes in the pattern of energy use, then Indonesia's sustainability and energy security will be disrupted. Therefore, Indonesia really needs alternative energy. Biogas is an alternative energy produced from the anaerobic degradation of organic compounds and can be a substitute for natural gas and fossil fuels. Solid tea waste can be used as a substrate from anaerobic co-digestion biogas production with cow dung. In general, the purpose of this study is to produce biogas from tea pulp and cow manure by anaerobic co-digestion and have a specific purpose, namely (i) Assessing the effect of pretreatment on the yield of biogas produced, (ii) Assessing the effect of pH on yield of biogas, (ii) Assessing the effect of the value of the C / N ratio on the yield of the biogas produced. This research was conducted by making variations in treatment including physical pretreatment with and without grinding (± 1 mm), biological pretreatment with and without addition of 5% v / v microbial consortium, pH controlled (addition of buffer) and uncontrolled, and ratio of C: N waste solid tea (25 and 30). The biogas formation process is carried out for 2 months at room temperature with the quantitative response test results in the form of biogas volume every 2 days. Biogas production in pretreatment tea grounds gives better results than without pretreatment. Optimum biogas production is obtained at a C: N 30 ratio. Comparison of C: N substrate will affect the growth of microorganisms, the microbes that play an anaerobic process need nutrients to grow and develop, in the form of carbon and nitrogen. The highest biogas accumulation produced was 73,167 ml / gr TS on variable C / N 30 ratio, NaOH pretreatment, microbial consortium and smooth size of tea waste that used.

CHARACTERISTICS OF CLARIFICATION PROCESS IN NITRIFICATION – DENITRIFICATION SYSTEM FOR WASTE WATER WITH N-NH3 Ari Setiawan; Bayu Hari Nugroho
Waste Technology Vol 8, No 1 (2020)
Publisher : Diponegoro University

Research on combinations of activated sludge processes - The clarifier is an attempt to improve the performance of the activated sludge process. In this system, the clearing works as a sediment deposition. The treatment process is expected to operate at a high biomass concentration and produce a compact system for optimal deposition speed. Some of the things covered in this research are, to calculate the rate of sludge deposition in the purifier and to measure the level of water purity or turbidity of the activated sludge treatment process. In this research, synthetic wastewater is used. The ventilation tank is made of plexiglass, with a total volume of 150 Liter. The clarifier is made of plexiglass with an inverted prism shape. The results show that the deposition rate and the degree of purity of water are influenced by the concentration of bacteria Mixed Liquor Suspended Solid (MLSS) or bacteria. The results show that the concentration of MLSS or bacteria increased, the deposition rate decreased. This can be seen in the MLSS 130 ppm which shows faster deposition rate than the MLSS 355 ppm. In the case of turbidity, larger MLSS results, increased turbidity, indicate an accurate flux.

Strategies for Paint Waste Minimization in the Packaging Industry Ari Dina Permana Citra; Purwanto Purwanto
Waste Technology Vol 8, No 1 (2020)
Publisher : Diponegoro University

Cosmetic packaging painting using an alkyd resin compound is to make a smooth, glossy surface and attract the attention of consumers. The generated waste is handed over to a third party and has not been utilized as a product, so it requires a high enough cost. This research aims to develop a waste management strategy from its source to its utilization into a product. The research method uses a block diagram of the production process to identify waste generation and opportunities for prevention and reduction. Waste arising from alternative uses is created into a product leading to zero waste. This approach provides economic and environmental benefits for the cosmetics packaging industry.

Municipal Waste Management Policy: Kebumen Regency Achmad Chalid Afif Alfajrin; Fajar Adie Nugraha; Budi Santoso
Waste Technology Vol 8, No 1 (2020)
Publisher : Diponegoro University

Waste management is carried out to utilize the value that is still contained in the waste itself, namely through the process of composting, recycle / recycling, combustion (incineration), and others. Managing waste comes in the five most challenging aspects of managing a city, but strangely this sector receives less attention than other urban issues. The quality of waste services is one indicator of good city governance. Therefore, waste management is still a big challenge for the cities in Indonesia. These challenges include public awareness that is still relatively low, especially those selling in the market, the lack of waste collection facilities, and the limited number of sanitation extension workers so that the intensity of counseling is still low. Every region in Indonesia has its own regional regulations regarding waste management. Policies related to waste management in Kebumen Regency are regulated in the Regional Regulation of Kebumen Regency No. 34 of 2011. The regulation contains a reduction in the volume of waste, statements related to fees, compensation, partnerships, dispute resolution, investigations, and criminal provisions. The Kebumen Regency Public Works Office can manage 840 m³s of garbage every day, but only 320 m³s of garbage can be transported by sanitation workers to Semali TPA and Kaligending TPA. Specifically in the case of specific waste treatment, PKU Muhammadiyah Sruweng Hospital has used 20 closed tube containers with yellow plastic coated 60 liter and replaced every day for medical waste produced. The success of waste management policies in an area is seen from the factors of human resources, communication, facilities and infrastructure, and law.

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Jawa tengah

INDONESIA