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The fast fashion industry is a fashion model that alternates over a short period. One of the efforts to overcome the problem of reducing fast fashion waste is to apply the circular economy concept. Composting from fabric waste is biodegradable, making this a revolutionary solution for the circular economy. So, it can handle water pollution to a minimum value, fabric waste treatment must be separated from the biodegradable materials. Standard SNI 19-7030-2004 compost with specifications, among others, from domestic organic waste that can be used as fertilizer. This study applies compost from biodegradable cotton fibre waste as a result of curing its accompanying material for 30 days. Vegetable and fruit waste materials, husk charcoal, yard soil and EM4 bio activator were used to accelerate the composting process. The results of biodegradable fabric compost are used as fertilizer for shallots (Allium cepa L. var. Aggregatum) of the green stone variety. Soil pH conditions were observed for 30 days based on the P0, P1 and P2 treatments and the average real results were 5.5 – 6, 8. Onion cultivation using biodegradable fabric compost was proven to have positive effects. Tested based on plant physiology, namely the content of chlorophyll a and b leaves at DAT, which is 30 days. The value of plant leaf chlorophyll is control Ca= 0.031 (mg/g), Cb=0.007(mg/g). Shallots from the treatment of compost weight of 200gram and 300 grams, the values of chlorophyll a (Ca-0.0018 mg/g) and Cb were significantly different around 0.007mg/g. Chlorophyll a was tested because of the interaction of fabric compost from the treatment of 200 grams and 300 grams, there was no significant difference. The plant stem height between treatments of 300gram (P2) cloth compost, the highest value was 29.83 cm.

The paper studies power losses in transformers due to non-linear loads. The research aims to analyze the power loss in a single-phase dry transformer under a non-linear load. The research uses an SW43W Power supply type, FlukeView Power Quality Analyzer as a DC or AC power supply on the primary side of the transformer. The non-linear load is connected to the secondary side. The loading test of the dry transformer was carried out at non-linear loads. The load variations used 0 %; 12.5 %; 25 %; 37.5 %; 50 %; 62.5 %; 75 %; 87.5 % and 100 %, as well as variations in the THD value by adjusting the ignition angle (α). The non-linear loads used are Half-Wave Rectifier and Controlled Half-Wave Rectifier with resistive loads with variations in THD values. The results showed that the transformer losses comprised Pno load and Pload. The operation of the transformer with constant input voltage and frequency with THDv<5 % resulted in a constant Pno load value at all load values. The greater the percentage of the load, the higher the load. The increase in THD because of non-linear load will increase the load on the transformer. The value of the derating factor is obtained by connecting the increase in losses (∆PLosses), which is influenced by THD and the increase in temperature T(°C) in dry transformers. When the transformer is loaded with a non-linear load, the derating factor<1. THD and derating factor form a linear relationship, when THD increases, the derating factor value decreases. Linear load on the transformer causes a decrease in its capacity, but if it gets a non-linear load with THD=39.1 %, it can withstand a load of 84.294 %, besides the increase in total harmonic distortion will increase losses and reduce transformer capacity