Instalasi Pengolahan Air Limbah Industri Pemerahan Sapi dengan sistem lumpur aktif seringkali mengalami masalah, salah satunya adalah masalah sludge bulking. Permasalahan bulking menyebabkan pengendapan sangat buruk dan melimpah menuju outlet bak sedimentasi unit selanjutnya. Hal ini mengakibatkan kualitas pengolahan tidak berjalan optimal hasil masih sering keruh berbau. Salah satu solusi untu...

Since the earlier anaerobic treatment systems, the design concepts were improved from classic reactors like septic tanks and anaerobic ponds, to modern high rate reactor configurations like anaerobic filters, UASB, EGSB, fixed film fluidized bed and expanded bed reactors, and others. In this paper, anaerobic reactors are evaluated considering the historical evolution and types of wastewaters. T...

ethyl benzene used increasingly each year is the raw material of producing styrene monomer. this substanceis produced from benzene alkylation with ethylene or ethanol, depending on the availability and cost of rawmaterials. in this study benzene alkylation in the presence of ethanol in a catalytic fixed bed reactor inthree states of isotherm, adiabatic and non-isotherm-non-adiabatic is mathemat...

Microalgae is the third generation of biomass as renewable energy, a future energy source for making bio-oil. The purpose this research to examine from microalgae Spirulina platensis residue (SPR) using pyrolysis process, investigate effect particle mesh and temperature on determine bio-oil properties, including density, pH, color, flame power, conversion. Fixed bed reactor used SPR with dimens...

Methanogenic community structure and dynamics were investigated in two different, replicated anaerobic wastewater treatment reactor configurations [inverted fluidized bed (IFB) and expanded granular sludge bed (EGSB)] treating synthetic dairy wastewater, during operating temperature transitions from 37°C to 25°C, and from 25°C to 15°C, over a 430-day trial. Non-metric multidimensional scaling (...

The present study describes the application of Fischer Tropsch biowaxes as a feedstock in a pilot-scale hydroprocessing unit at operating conditions very similar to industrial size hydrotreating plants of traditional refineries. The project focus on a future coprocessing of biowax/gasoil blends due to produce bio-products derived from lignocellulosic biomass: crack gases, naphtha, kerosene, die...

in this research, the selective oxidation of benzene to maleic anhydride (man) in a fixed-bed reactor was studied. the gas phase catalytic oxidation of benzene was carried outin a laboratory scale fixed bed reactor on the catalysts, which were prepared having two different compositions on silica gel. the effects of temperature, flow rates of benzene and air, and catalyst type on the reaction se...