SUMMARY
PREFACEIndonesian Journal of Science and Technology (IJoST) is a peer-reviewed journal that aims to publish and disseminate innovative research articles on the latest developments in all fields of science and technology. The journal publishes original papers in English, which contribute to the understanding of science and improvement of the science and technology. Papers may be theoretical explanation (including computational), experimental observation and analysis, or combination from both theoretical and experimental analysis. The contribution should be unpublished before and not under consideration for publication in elsewhere. IJoST maintains a standard double-blind peer review process. The review process means that the identity with the author, and the reviewer are not known to each other. IJoST is an open-access journal, and in this issue IJoST does not charge for readers, authors, or their institutions for access to the journal articles. This journal was firstly be published on April 30, 2016, and issued every April and September in each year, published by Tim Pengembang Jurnal at Universitas Pendidikan Indonesia.In this issue, we published nine papers, including seven original research articles and two review papers. In this issue, we received papers from remarkable researchers in several countries in the world, including Belgium, Japan, Singapore, Malaysia, The Netherlands, and Indonesia. The first paper discussed enzymatic cleaning method for reducing membrane fouling in membrane bioreactor. The next paper presented about application of artificial neural network for predicting biodiesel production. In the third paper, authors discussed about comparison of air temperature under global climate change in Japan. In the fourth paper, authors discussed about kinetics and thermodynamic studies the adsorption of phenol on activated carbon. The fifth article presented sludge dewatering process control using principal component analysis and partial least square. The next paper discussed the use of process simulation for plant debottlenecking. The sixth paper is a review article regarding the use of agricultural waste for silica source material. The seventh paper is a review of high-temperature oxidation of steel in steam condition. The final paper described on the fabrication of biomembrane from banana stem for lead removal.We believe that this issue will give benefits for the improvement and the development of science and technology. Bandung, April 2016 Editor