The air quality that is increasingly carrying out pollution as a result of pollution by human activities is of concern to the world, both developed and developing countries. The impact of air pollution is unavoidable, especially for health. Several efforts have been made to suppress the occurrence of pollution starting from the control of sources, media, and protective efforts in human beings. Focusing on protective efforts, this study was carried out by designed respiratory masks capable of adsorbing toxic gases in ambient air by utilizing mask materials on the market with the addition of activated carbon; the study was carried out with an experimental approach. Testing distinguishes the ability of cotton, spunbond, meltblown, and activated carbon as a respiratory mask to absorb toxic gases such as COx, NOx, and SOx. Test statistics are using the ANOVA test with a confidence level of 95%,α= 5%. The results show that combining activated carbon, spunbond, and meltblown is more effective compared to respiratory masks made from spunbond and meltblown (surgical masks) in absorbing toxic gases.

Masalah sampah pasar tradisional sebenarnya tidak terlalu susah, namun juga tidak sederhana,  karena memiliki karakteristik yang sedikit berbeda dengan sampah dari perumahan. Komposisi sampah pasar tradisional lebih dominan sampah organik yang dapat di daur ulang menjadi kompos  atau pupuk organik. Agar proses pengomposan dapat berlangsung lebih cepat diperlukan alat biakan berupa komposter dan menambahkan aktivator atau biang kompos. Tujuan penelitian ini yaitu enganalisis perbedaan penggunaan Komposter An-aerob dengan Komposter Aerob terhadap laju proses pengomposan sampah organik. Penelitian menggunakan metode eksperimen semu (quasi experiment), antara perlakuan (komposter Aerob) dengan kontrol (komposter An-aerob). Hasil menunjukkan kecepatan waktu pematangan kompos pada parameter perubahan warna bahan dan bau bahan kompos dengan komposter anaerob rata-rata kecepatan kematangan kompos sebesar 10,22 hari, sedangkan dengan komposter aerob rata-rata kecepatan kematangan kompos sebesar 9,89 hari. Berdasarkan uji statistik Wilcoxon Signed Rank Test dengan α 5%, untuk parameter warna diperoleh tingkat signifikansi (p value) sebesar 0,006, sedangkan berdasarkan parameter bau diperoleh tingkat signifikansi (p value) sebesar 0,003. Dengan demikian ada perbedaan yang bermakna antara proses pengomposan dengan menggunakan komposter anaerob dengan komposter aerob

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Fuel pellet is one of the innovation products that can be produced from various sources of biomass such as agricultural residues, forestry and also wood industries including wood bark. Herein this paper, the potential fuel pellet production using Acacia mangium bark that abundant wasted from chip mill industry was studied. Fuel pellet was produced using a modified animal feed pellet press machine equipped with rotating roller-cylinders. The international standards quality of fuel pellet such as ONORM (Austria), SS (Sweden), DIN (Germany), EN (European) and ITEBE (Italy) were used to evaluate the optimum composition of feedstock and additive used. Theresults showed the quality offuel pellet produced were good compared to commercial sawdust pellet. Mixed of Acacia bark (dust) with 10% of tapioca and 20% of glycerol (w/w) was increased the stable form of pellet and the highest heating value to reached 4,383 Kcal/kg (calorific value). Blending of Acacia bark with tapioca and glycerol was positively improved its physical, chemical and combustion properties to met the international standards requirement for export market. Based on this finding, production of fuel pellet from Acacia bark waste biomass was promising to be developed as an alternative substitution of fossil energy in the future.

Worms are still a serious problem for poor and developing countries. Children, especially school-age children, are more at risk of infection. Efforts need to be made to prevent the effects of worms. Prevention can be done through a promotive approach. This observational study with a pre-posttest and cross-sectional approach is aimed at evaluating the effectiveness of health education on healthy and helminthic behavior and analyzing the impact of helminthiasis on the deficit in the diet and children’s learning achievement. The number of samples is 60 students from five grade 3 and 4 elementary schools in North Pontianak, West Kalimantan. The sampling technique was carried out by proportional random sampling. Worm infection in elementary school students was 16.7%, anemia was 55%, and learning achievement scores were less than the average grade of 55%. There was a significant difference in health counseling towards a decrease in the worm number (p=0.046). There was a significant relationship between healthy living behavior and helminthiasis (p=0.005). There was a significant relationship between helminthiasis and anemia (p=0.017). There is a relationship between helminthiasis and learning achievement in elementary school children (p=0.017). There is a relationship between anemia and learning achievement (p=0.005). It is necessary for public health centers to provide treatment services for worms and health education about the effects of helminthiasis on health and learning achievement. The school should provide hand washing facilities in schools, and parents should play an active role in improving clean and healthy lifestyle habits at home.