ABSTRAKTujuan dari penelitian ini adalah untuk menentukan larutan pengekstrak jantung pisang kepok yang menghasilkan antosianin tertinggi, menentukan konsentrasi ekstrak jantung pisang kepok dalam agar-agar yang paling disukai panelis, menentukan laju degradasi warna agar-agar dengan pewarna jantung pisang kepok akibat penyinaran pada berbagai intensitas cahaya, dan menentukan intensitas cahaya maksimum yang masih dapat diterima oleh panelis berdasarkan uji hedonik setelah penyinaran. Antosianin jantung pisang kepok diekstraksi menggunakan pelarut asam tartarat, asam sitrat, dan asam asetat. Kadar antosianin diukur dengan metode perbedaan pH. Untuk uji hedonik digunakan agar-agar dengan kadar ekstrak jantung pisang kepok 15%, 20%, 25%, 30%, 40% dan 50 %. Uji stabilitas warna dilakukan terhadap agar-agar dengan pewarna jantung pisang kepok 25%, dan disinari selama 10 jam dengan intensitas cahaya 780, 1.850, 2.214, dan 10.340 lux. Hasil penelitian menunjukkan bahwa larutan pengekstrak yang menghasilkan antosianin tertinggi adalah asam tartarat. Konsentrasi ekstrak jantung pisang kepok dalam agar-agar yang paling disukai panelis adalah 25 %. Laju degradasi warna agar-agar dengan pewarna jantung pisang kepok meningkat seiring dengan meningkatnya intensitas cahaya, dengan nilai k berkisar antara 0,0042 -0,0096 AU/Jam. Agar-agar dengan pewarna jantung pisang kepok yang disinari dengan intensitas 780-2.214 lux selama 10 jam masih disukai panelis, sedangkan yang disinari dengan intensitas 10.340 sudah tidak disukai panelis.Kata kunci: Antosianin, jantung pisang, agar-agar, intensitas cahaya, laju degradasi warna ABSTRACTThe objectives of this study were to determine the solution that could extract highest anthocyanin from banana bract, to determine the concentration of banana bract extract in jelly which preferred best by panelists, to determine color degradation rate in jelly colored with banana bract against light on various light intensity, and to determine the maximum light intensity which could be accepted by the panelists based on the hedonic test. Anthocyanin of banana bract was extracted by tartaric acid, citric acid, and acetate acid. Anthocyanin content of banana bract was measured by pH differential method. For the hedonic test, jelly with concentration of banana bract 15%, 20%, 25%, 30%, 40% and 50%, were used with 20 panelists. Then jelly with 25% concentration of banana bract was used for determination of color degradation rate caused by light with the intensity of 780, 1,850, 2,214 dan 10,340 lux. The results showed that the best solution that extracted highest anthocyanin was tartaric acid, the concentration of banana bract extract in jelly that preferred best by panelists was 25%, the color degradation rate was increased along with the increasing of light intensity, with the k value 0.0042 -0

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The policy of sustainable production has encouraged small batik businesses to shift to natural dyes as these are considered eco-friendly. However, the motivation behind juragan batiks' embracing natural dyes still has some question marks attached. This qualitative study explains the motivation of the juragan batiks in using natural colourants in their production of batik warna alam and explores the significance of batik warna alam to juragan batik. We found the production of batik warna alam tended to be triggered by economic reasons not environmental consciousness. This related to the meaning of batik warna alam to maintaining the economic survival of the juragans. Juragans are convinced that batik warna alam is eco-friendly according to the indicators to which they subscribe: (1) the materials are found in their immediate surroundings; (2) the process causes no pollution or environmental destruction; and (3) the production does not pose a health threat to people, including workers. This study provides the insight that an eco-friendly-labelled production might not necessarily be motivated by a high level of environmental consciousness.

Batik is one of popular arts of Indonesia. The batik industries in Sragen, Central Java, are prepared to compete in global market. In order to realize that objective, batik products should fulfill some qualifications, one of which is "environmental friendliness". As batik production is usually generating wastewater which pollutes the environment, the technology of wastewater treatment should be developed to solve the problem. This preliminary study has been done to assess the effectiveness of anaerobic baffled reactor (ABR) and rotating biological contactor (RBC) in batik wastewater treatment. In 40 days of treatment period, the ABR performance in reducing pollutants showed an effectiveness up to 75%, whereas RBC effectiveness was in the range of 15-57%. Concerning the quality standard of wastewater, the wastewater treatment system showed a good performance to decrease pH, whereas the COD was still high. Further optimization, then, is needed to improve the quality of effluent.