Ikan lele dumbo pada umumnya dikonsumsi pada size 6-8 ekor /kg, ukuran 2 -1 ekor / kg tergolong ukuran jumbo kurang  laku, pangsa pasarnya sangat terbatas. Konsentrat protein ikan (KPI) merupakan bahan pangan untuk konsumsi manusia, dengan jumlah protein yang dihasilkan lebih banyak dari kondisi awalnya. Faktor-faktor yang mepengaruhi mutu KPI antara lain jenis ikan,  jenis pelarut, cara ekstraksi dan lama ekstraksi. Penelitian ini dilakukan untuk mengetahui jenis pelarut  terbaik dan ulangan ekstraksi, pembuatan KPI berbahan baku ikan lele dumbo ukuran jumbo. Ikan lele dumbo di ekstrak menggunakan pelarut isopropil alkohol dan etanol, ekstraksi dilakukan 1 kali, 2 kali. 3 kali dan 4 kali. Hasil penelitian  pelarut terbaik menggunakan pelarut isopropil alkohol 90%, pengulangan ekstraksi 4 kali, menghasilkan kadar protein 78,71%, kadar lemak 0,69%, derajat putih 84, nilai organoleptik  4,29 bau ikan sangat lemah, memiliki 8 asam amino esensial, 5 asam amino non esensial dan 2 asam amino semi esensial.KPI ikan lele dumbo ukuran jumbo berupa produk dalam bentuk tepung berwarna putih yang mudah diplikasikan sebagai bahan fortifikasi.

At present the world is required to realize sustainable development, as outlined in the Sustainable Development Goals (SDGs). SDGs are 17 goals determined by the United Nations as a world development agenda for the benefit of humans and planet earth and are expected to be achieved in 2030. The first three SDGs are: first (poverty), second (hunger), and third (healthy and prosperous life). To achieve the 3 first goals of SDGs, a study on the production of fish protein concentrate (KPI) made from dumbo rejected catfish was conducted, and added the KPI catfish rejected concentrate to improve the quality of destitute crackers. The results of the study were: (1) the best KPI was made by extraction using 75% isopropyl alcohol (IPA) solvent, with 4 repetitions, the highest protein content was 78,71%, the lowest fat content was 0,69%, and the organoleptic value highest (4,37); and (2) the best destitute crackers are crackers with the addition of 10% KPI with quality: 12,41% protein content, 28,5% florality, organoleptic value crispy texture, very weak savory taste, bright cream cracker color. The addition of KPIs derived from dumbo reject catfish in destitute crackers is expected to be used to achieve the objectives of the first SDGs up to the third, but further research is needed in the production scale with an analysis focus on economic aspects.   Saat ini dunia dituntut untuk mewujudkan pembangunan berkelanjutan, yang dituangkan dalam Sustainable Development Goals (SDGs). SDGs merupakan 17 tujuan yang ditentukan oleh PBB sebagai agenda dunia pembangunan untuk kemaslahatan manusia dan planet bumi dan diharapkan dapat dicapai pada tahun 2030. Tiga tujuan pertama SDGs adalah: pertama (kemiskinan), kedua (kelaparan), dan ketiga (Kehidupan sehat dan sejahtera). Untuk mecapai 3 tujuan SDGs ini dilakukan penelitian pembuatan konsentrat protein ikan (KPI) berbahan baku ikan lele dumbo afkir, dan menambahkan KPI lele dumbo afkir untuk meningkatkan kualitas kerupuk melarat. Hasil penelitian adalah: (1) KPI terbaik dibuat dengan ekstraksi menggunakan pelarut isopropil alkohol (IPA) konsentrasi 75%, dengan 4 kali pengulangan, memiliki kadar protein yang paling tinggi 78,71 %, kadar lemak terendah 0,69%, dan nilai organoleptik tertinggi (4,37); dan (2) Kerupuk melarat terbaik adalah kerupuk dengan penambahan KPI 10% dengan kualitas: kadar protein 12,41%, tingkat kemekaran 28,5%, nilai organoleptik tekstur renyah, rasa gurih sangat lemah, warna kerupuk krem keputihan cemerlang. Penambahan KPI yang berasal dari lele dumbo afkir pada kerupuk melarat diharapkan dapat digunakan untuk mencapai tujuan SDGs pertama sampai dengan ketiga, namun diperlukan penelitian lebih lanjut dalam skala produksi dengan fokus analisis pada aspek ekonomi.

In line with the increase in population, the production of waste will also grow every year. Unfortunately, the land used for final waste disposal (landfill) is extremely limited, especially in developing countries. This study aimed to predict landfill capacity in accommodating waste from the community based on daily waste input using a dynamic system and to provide alternative policies on landfill waste management. The analyzed data consisted of primary and secondary data, whereas the simulations applied system dynamic approach using Vensim software. The simulation results indicate that the waste production will reach 36,861,653 tons in 2030 if nothing is done. Assuming that all waste from the surrounding communities is accumulated in one landfill, Bantargebang landfill can only accommodate until 2022. To be able to use Bantargebang landfill up to 2030, the waste production must be reduced by 50% for organic waste and 50% for inorganic waste. From the analysis, it is proven that composting reduces a greater amount of waste than other waste reduction methods, namely recycling or reusing, by the same percentage. Waste sorting is therefore highly recommended to be done by the community in every household as a basis to facilitate further handling. The community can play an active role in reducing waste, e.g., by composting organic waste and recycling or reusing inorganic waste. Furthermore, regulations should be made that can give punishment to households that do not carry out segregation. Reliable infrastructure for waste management needs to be facilitated, and counseling/training/outreach on waste sorting to the community must also be provided at the district level.

Abstract-Some of laterite mineral from Southeast Sulawesi, Indonesia, has low grade nickel contain. This research was done in 3 steps to analyze the possibility of extracting nickel from low grade laterite for industry. In the first step of this research heap leaching method is used in laboratory scale for extracting the nickel from laterite mineral using sulfuric acid and hydrochloric acid. The result of the first step research is the higher the acid concentration used will be the more concentration of nickel produced in the Pregnant Leach Solution (PLS), and with the same concentration of sulfuric acid to produce more nickel than hydrochloric acid. The second step of this research was done in micro industry scale using sulfuric acid to leach nickel from laterite with the variety of laterite height and sulfuric acid concentration. The result from the second step research is stated that 2 M of sulfuric acid is the optimum concentration and 1.5 m laterite sample height. The third step of this research is to design the pilot industry scale for nickel heap leaching reactor with bamboo as a part of reactor and to analyze the feasibility cost. The reactors designed in this study do not produce waste, so that it is expected to meet environmental sustainability rules. The results of the calculation show that the heap leaching reactors designed in this reseach will economically sustain, and will give benefit for 126.13 US $ for each nickel production.

Some studies about climate change in Jakarta have revealed that air pollution and water supply has reached a critical level, and one of the efforts to reduce that climate change impact is to increase green areas. Under Indonesian Law No. 26/2007 the proportion of ideal green area in big cities like Jakarta is 30% of the total city areas; unfortunately at this time the green area in Jakarta is only 9.84%. The effort to increase green areas in Jakarta requires huge funds, since the price of land in Jakarta is very expensive. On the other hand, green space is a critical requirement to provide clean air and water supply. This study aims to find an optimum number of green areas in Jakarta. Optimization of green areas will be done using the goal programming method. The results of this study revealed that the optimum amount of green area in Jakarta is 19.62% or 129,800,045 m 2 . With the land costs assumptions at 2 million rupiahs per m 2 , the fund should be prepared to increase the green space from 9.84% to 19.62% at 129.413 trillion rupiahs. It is hoped that the findings of the research can be used as the basis for communities and policy makers to increase green space in Jakarta.