The increase in population is directly proportional to the increase in the amount of clean water. Nearly 80% of clean air becomes waste water. Before being discharged into an air body, waste water needs to be processed first. Operation of WWTP The goal is to treat wastewater to be safely disposed of into the environment. One area that has a communal WWTP is RT 2 RW 12, Bendul Merisi Sub-District, Wonocolo District, Surabaya City. The purpose of this study was to examine the sustainability of communal WWTP in RT 2 RW 12 Bendul Merisi Village, Wonocolo District, Surabaya City. This research is quantitative and quantitative. Communal WWTP at RT2 RW 12, Bendul Merisi Village, Wonocolo District, Surabaya City. Technical aspects have good sustainability status (83.48%), access features are included in a fairly sustainable category (71.38%), institutional aspects have a fairly sustainable sustainability status (56.54%) and economic aspects have a less sustainable sustainability status ( 50%). The results of the study showed that the sustainability status of communal WWTP in RT2 RW 12, Bendul Merisi Subdistrict, Wonocolo Sub-District, Surabaya City was included in the fairly sustainable category (63.85%).

Limbah adalah bahan sisa yang dihasilkan dari suatu proses produksi, baik skala rumah tangga, industri maupun pertambangan. Kertas memiliki kandungan kimia dan alami yang bagus sehingga limbah kertas bisa didaur ulang menjadi berbagai macam bentuk. Kertas koran bekas diolah dahulu menjadi bubur kertas agar pengadukan campurannya lebih mudah. Papercrete adalah suatu material bangunan terbuat dari campuran kertas yang didaur ulang, semen portland, pasir dan air. Pengujian absorpsi dan permeabilitas pada papercrete menggunakan metode eksperimental di laboratorium setelah benda uji berumur 28 hari. Variasi campuran menggunakan perbandingan berat semen, kertas, pasir (SKP) 1:1:1; SKP 1:2:1; SKP 1:3:1; SKP 1:1:2; SKP 1:2:2; SKP 1:3:2 dengan perbandingan faktor air semen (FAS) adalah 1. Benda uji berbentuk silinder berdiameter 7,5cm dan tinggi 27,5cm sebanyak 18 buah untuk uji absorpsi dan 18 buah untuk uji permeabilitas dengan tiga buah benda uji tiap variasi campurannya. Hasil pengujian absorpsi menunjukkan benda uji SKP 112 memiliki nilai absorpsi terkecil yaitu 35,64%, sedangkan benda uji SKP 131 memiliki nilai absorpsi terbesar yaitu 85,73% dengan lama perendaman 10,5 menit. Pada pengujian permeabilitas benda uji SKP 111 memiliki nilai koefisien permeabilitas terkecil yaitu 2,13505x10 -7 m/dt, sedangkan benda uji SKP 132 memiliki nilai koefisien permeabilitas terbesar yaitu 5,17191x10 -6 m/dt selama 1 menit. Kondisi ini menunjukkan bahwa nilai absorpsi dan nilai koefisien permeabilitas pada papercrete akan semakin besar bersamaan dengan penambahan prosentase bubur kertas ke dalam campuran. Pemanfaatan limbah kertas koran untuk pembuatan papercrete ini diharapkan mampu mengurangi permasalahan sampah kertas dan memberi keuntungan perawatan kondisi lingkungan dan sumber daya alam melalui produk material papercrete yang ramah lingkungan pada elemen struktur ringan dan non struktur seperti pembuatan dinding partisi, pengganti paving block dan rabat beton lantai.Kata kunci: pemanfaatan limbah, kertas koran, absorpsi, permeabilitas, papercrete dan aplikasinya

Pengolahan      sampah      di      TPST      Sampurno      masih      dilakukan      dengan angkut-pemilahan-buang ke Tempat Pemrosesan Akhir. Maka dari itu perlu dilakukannya Redesain perencanaan TPST Sampurno menjadi Tempat Pengolahan Sampah Reduce, Reuse, Recycle (TPS3R) agar berjalan secara optimal. Penelitian bertujuan untuk mengetahui kondisi pengelolaan eksisting sampah, identifikasi timbulan, densitas dan   komposisi sampah, membandingkan kelayakan TPST dengan Permen PU  No.03 Tahun 2013, melakukan redesain TPST  serta  menghitung  RAB  yang  diperlukan.  Dalam  penelitian ini menggunakan metode kualitatif berupa data sekunder dan juga metode kuantitatif berupa pengambilan sampel sesuai dengan SNI 19-3964-1994. Hasil observasi menunjukkan kondisi pengelolaan eksisting sampah hanya diangkut dari sumber ke TPST kemudian diangkut menuju TPA dan timbulan sampah sebesar  24,14 m3 densitas sampah sebesar 162,12 kg/m3 timbulan sampah sebesar 0,41 kg/jiwa/hari dimana komposisi sampah didominasi oleh sampah organik. TPST Sampurno tidak sesuai dengan PERMEN PU  No.03 Tahun 2013 dan TPST Sampurno perlu redesain menjadi TPS3R agar berfungsi dengan optimal dalam mengelola sampah di Kelurahan Kalisampurno dengan RAB sebesar Rp. 2.021.010.000,00.

Until the next following decades, energy mixed in Indonesia will be dominated by coal. Many studies assert that biomass can be used as coal substitution but it is not the case in the real world because the cost of biomass is still higher than the coal price. This study proposes the cheaper way of making biomass by using special method of local waste processing unit that has a patented name, TOSS. This kind of biomass, which was invented by STT PLN Jakarta, school of technology, is more economical than other biomass because waste as raw materials is much cheaper than other commonly used biomass like wooden forestry or agroplantations. Many cities in the world are solving their municipal waste problem by using large scale and high tech approach, which process is conducted in the landfill area. TOSS is using small scale and simple technology that can convert waste to become pellet by local people in its source. The pilot project at Klungkung showed that the pellet of TOSS can be used not only for cooking but also for diesel fuel substitution. This study will use that finding to show that TOSS pellet can also reduce coal consumption by mixing it with normal coal. The simulation is conducted by calculating the equivalent energy and capacity of waste energy from TOSS in term of coal equivalent under the context of Indonesia.

Pest attacks that result in reduced crop yields require alternative control that is able to prevent damage to agricultural land. Organic pesticides are environmentally friendly pesticides because the materials used are derived from natural ingredients, one of which is liquid smoke, namely liquid smoke made from natural ingredients containing cellulose, hemicellulose, and lignin. This study was to determine the effect of giving liquid smoke of siwalan peel waste as an organic pesticide. Liquid smoke is obtained from the combustion process with a little oxygen at a certain temperature. The content of compounds in liquid smoke was analyzed using GCMS. Pyrolysis results obtained dark brown liquid smoke, clear, has a smoke-like odor (sangit), and has a watery texture which is used as an organic pesticide on spodoptera litura with varying concentrations of 5%, 7%, 9%, 11%, and 13%. The results of the GCMS analysis found 18 components of the liquid smoke of siwalan rind waste, among the compounds that function as organic pesticides are phenol, furfuran, acetone, and palimitic acid. The results of the analysis of the mortality of spodoptera litura sequentially showed the average value of mortality in 2 repetitions, namely 5%, 10%, 15%, 20%, and 35%. The greater the concentration of liquid smoke, the higher the mortality value. However, it is less effective to kill spodoptera litura quickly, even mortality at a maximum concentration of only 35% or has not reached the death rate of 50% of test animals.