Noise can occur anywhere, including at educational institutions. Noise research at educational institutions began to be studied a lot because of the negative impact on the teaching and learning process and disrupt the performance of teachers and students. Some studies show that schools or universities located on the edge of the road, show noise levels that exceed quality standards. This research was conducted at educational institutions located along the east Frontage Road Jl A.Yani Road, Surabaya, by measuring noise levels at 3 locations, in daylighting measurements with 4 measurement times (L1-L4). Data collection and processing was carried out by referring to the quality standard of KEPMENLH No. 48 of 1996. Data was measured using a sound level meter for 10 minutes for each measurement, with a reading every 5 seconds to obtain 120 data. Data processing results are compared with the standard noise level. The noise value at SD Margorejo I / 403 is 82.2 dB, UIN Sunan Ampel Surabaya is 79.76 dB, and SMK 3 Surabaya is 80.06 dB. The noise level value has exceeded the established quality standard, which has maximum of 55 dB for the educational intitutions area. The source of noise comes from the activities of motorized vehicles in and around educational institution that is quite crowded. Another cause of the high noise value is the train activities along the east frontage road Jl A.yani Surabaya, as well as the distance of the noise source with research location that relatively close. Keywords: noise, educational institution, sound level meter

Black Soldier Fly (BSF) larvae treatment is one of the organic waste processing alternatives considered to have a faster process than the other organic waste processes. However, in solid organic waste processing, BSF larvae ability to reduce organic waste is relatively low. This research aims to know the optimum waste reduction index of fruit and vegetable waste with the feed modification of fruits and vegetables' waste, analyze the Efficiency of Conversion of Digested food of BSF larvae, and know the survival rate of BSF larvae. This research used an experimental method with four reactors containing 200 larvae on each reactor. Larvae used in this research were aged 7-18 days. A different larva is fed to each reactor with rate of 100mg/larva per day. The feed are vegetables, steamed vegetables, fruit, and fermented fruit. The frequency of feeding was once a day, and weight reduction from the treatment was measured daily. Reduction results in the vegetable waste, steamed vegetables, fruit, fermented fruit were 45.29%, 42.92%, 33.75%, and 46.25%, respectively. According to the results, the reduction of fruits and vegetables' waste using optimum BSF larvae reached 46.25% in fermented fruit feed treatment. Keywords: BSF larvae, reduction, organic waste, fruit waste, modification   ABSTRAK Larva Black Soldier Fly (BSF) merupakan salah satu alternatif pengolahan sampah organik yang dinilai lebih cepat daripada pengolah sampah organik lainnya. Namun dalam pengolahan sampah organik yang padat, kemampuan larva BSF dalam mereduksi sampah organik cukup rendah. Penelitian ini bertujuan untuk mengetahui reduksi optimum sampah organik buah dan sayuran dengan modifikasi komposisi umpan sampah buah dan sayuran, untuk menganalisis konversi pakan yang dapat dicerna larva BSF, dan mengetahui tingkat keberhasilan hidup larva BSF. Penelitian ini menggunakan metode eksperimental menggunakan empat reaktor yang berisi 200 ekor larva pada setiap reaktornya. Larva yang digunakan dalam penelitian ini berumur 7-18 hari. Setiap reaktor diberikan umpan larva yang berbeda dengan laju pengumpanan 100mg/larva per hari. Umpan tersebut, di antaranya sayuran, sayuran dikukus, buah, dan buah difermentasi. Frekuensi pemberian umpan dilakukan satu hari sekali dan pengurangan berat umpan dari perlakukan yang diberikan diukur setiap hari. Hasil reduksi pada sampah sayuran, sayuran dikukus, buah, buah difermentasi  masing-masing: 45,29%, 42,92%, 33,75%, dan 46,25%. Berdasarkan hasil tersebut, reduksi sampah organik buah dan sayuran dengan larva BSF optimum, mencapai 46,25% pada perlakuan umpan buah fermentasi. Kata kunci: larva BSF, sampah organik, sampah buah, sampah sayuran, modifikasi

Muhammadiyah Babat Hospital in Lamongan District is one of the hospitals producing hazardous solid waste. Hazardous solid waste from the hospital has the potential environmental impacts and disrupt the public health both within the environment of the Hospital and surrounding communities, if not managed properly. Hazardous solid waste management system in the Hospital needs to be implemented properly and correctly in accordance with Government Regulation No. 101 of 2014 and KEPMENKES No.1204 / MENKES / SK / X / 2004. This research method using qualitative descriptive method by collecting primary and secondary data. Primary data obtained from observation and treatment in the field by weighing the quantity of hazardous solid waste and documentation of existing hazardous solid waste management, and interview. While secondary data obtained through study of literaturs and hospital documents related to the management of hazardous solid waste. The results showed that management system of hazardous solid waste at Muhammadiyah Babat Hospital was quite good and in accordance with Government Regulation and KEPMENKES. However, there are still some facilities that are not available to support the management of hazardous solid waste. Unavailable facilities include drainage channels, spill reservoirs, easily accessible APARs, and first aid facilities in the temporary landfill of hazardous solid waste in hospital. Suggestions that can be submitted to the conclusion of this research is the need for additional supporting facilities in temporary landfill of hazardous solid waste, in accordance with the applicable regulations, such as drainage channels, spill reservoirs, etc. Keywords: solid waste, hazardous solid waste, management, hospital.

The contamination of the river water with wastewater is a severe problem due to the utilization of the river water for drinking water mainly. Phytotechnologies can minimize the negative impact of this problem using plants in the river water rehabilitation. This study aimed to evaluate the potential of Salvinia molesta to phytoremediation of the polluted river by organic pollutants. There were two treatments on this research: polluted river without Salvinia molesta and polluted river with Salvinia molesta phytoremediation on the batch system. We took a water sample from the moderate polluted river for phytoremediation by Salvinia molesta. The period of the research was two weeks. The measured water quality parameters in this study were dissolved oxygen (DO), total solids (TS), total dissolved solids (TDS), biological oxygen demand (BOD) and chemical oxygen demand (COD). This study revealed that Salvinia molesta plants could improve the river water quality with enhancing DO by 58,26%, decreasing the parameters include TS by 31%, TDS by 97%, BOD by 26%, and COD by 74% compared to control without Salvinia molesta. Thus, the data suggest that Salvinia molesta may have a potential for phytoremediation (as water pollution treatment) of aquatic environments contaminated with organic pollutants from wastewater.

Pondok Pesantren merupakan salah satu institusi pendidikan islam yang sering identik dengan kurangnya manajemen lingkungan di dalamnya, terutama pengelolaan sampahnya. Pondok Pesantren Langitan dengan jumlah 3000 santri dengan wilayah seluas 7 hektar, menghasilkan sampah tidak kurang dari 400 kg/hari. Pengelolaan sampah masih dilakukan secara tradisional yaitu dikumpulkan, dikeringkan, dan dibakar. Belum adanya  pemilahan pada sistem pewadahan dan pengumpulan, serta belum adanya kegiatan pengolahan sampah terpadu di tempat penampungan sampah sementara.Oleh karena itu dibutuhkan pengelolaan sampah sederhana yang paling mungkin dilaksanakan di pondok pesantren. Pengelolaan sampah berkelanjutan yang dibutuhkan meliputi pewadahan, pengumpulan, dan pengolahan sampah untuk menangani timbulan sampah. Perencanaan sistem pewadahan, pengumpulan, dan pengolahan dilakukan berdasarkan hasil analisis komposisi dan volume sampah dipondok pesantren dengan teori perempatan, yang disesuaikan dengan persyaratan pada SK SNI T-13-1990-F dan aspek ekonomis. Berat timbulan sampah total 496,66 kg/hari dengan komposisi sampah yang didapatkan terdiri dari sampah organik 49,64% dan sampah anorganik 50,36%. Jumlah keseluruhan wadah sampah yang dibutuhkan dalam perencanaan ini adalah 44 pasang wadah sampah, yang terdiri dari 44 wadah anorganik (kuning) dan 44 wadah organik (biru) dengan pengumpulan sampah 1 trip/hari. Kegiatan pengolahan sampah direncanakan dengan komposting dan sortasi sampah yang dapat didaur ulang. Rencana anggaran biaya dalam perencanaan pengelolaan sampah ini sebesar Rp.16.699.172,00.