STUDI KARAKTERISTIK PROSES GASIFIKASI BERBAGAI JENIS BIOMASSA PADA GASIFIER DOWNDRAFT

Biomass gasification is an endothermic reaction process for converting biomass into syngas, occurs at high temperatures with limited oxygen. Knowing the temperature profile of biomass gasification wood charcoal, coconut shell charcoal and coconut shell, rice husk and woodchip and seek optimal results from gasification of biomass are the purpose of the research. The equipment in this research consisted o

PURIFIKASI AIR DENGAN TENAGA MEKANIK UNTUK PENYEDIAAN AIR BERSIH DALAM KEADAAN DARURAT

Natural disasters always pose problems for humans and the environment. In the unusual natural conditions such as floods, devastating earthquakes, volcanic eruptions, clean water to its own problems for humans. The earthquake and tsunami in Aceh on 2004 and earthquake in Yogyakarta on 2006 is a really example of environmental damage caused by natural cause an emergency situation. The purpose of this research include generating appropriate technologies such as water purification equipment with mechanical energy to provide clean water in an emergency, produces environmentally friendly technologies as an effort to improve sustainable development. This study is divided into two phase, the first phase is the generation of electric power to drive the mini water pump. 12 Volt dynamo driven by a paddle wheel bike R.30, to fill accumulator 12 Volt DC after rectified with Diode Bridge 1 Ampere. Accumulator is used as the driving force of mini water pump after rectified using inverter 12 Volt DC-AC. The second phase is design and manufacture of water purification equipment. The first serves as a coagulation box has a filter Biofoam 4 cm. The second box serves as a chlorination by 4 cm Biofoam filter and charcoal, while the third has a filter Biofoam 4 cm and charcoal serves as a water tank. Coagulant dose ratio used 0.50 grams / liter alum, 0.1 grams / liter of limestone with a contact time of 1 hour, while the chlorination process using a dose of 0.05 grams / liter of chlorine. for 5 minutes. Sample data collected from several rivers flowing in the region of Yogyakarta province. The parameters tested include Total Suspended Solids (TSS), Turbidity (NTU), the content of iron (Fe), manganese content (Mn), Sulfate (SO4), Degree of acidity (pH) and Total Coliform. Results of samples tested at Health Laboratory Yogyakarta. Mechanical water purification technology can be used effectively for the provision of clean water in an emergency. Coagulant dose ratio of 0.50 gram / liter alum, 0.1 grams / liter of limestone and 0.05 grams / liter of chlorine can lower water levels on the parameters TSS (Total Suspended Solid), Turbidity (Ntu), Iron (Fe), manganese (Mn), pH and Total Coliform in accordance with the water quality standards required

PENGURANGAN KADAR N, P dan Cr6+ PADA LIMBAH CAIR LABORATORIUM SECARA FITOREMEDIASI MENGGUNAKAN ENCENG GONDOK (Eichornia crassipes): STUDI KASUS LIMBAH LABORATORIUM JURUSAN TEKNIK KIMIA UNIVERSITAS GADJAH MADA

Laboratory is one of the unit which produce waste with relatively high hazardous content. Based on data of survey in 2009 -2010, waste water from laboratory of Chemical Engineering Department Gadjah Mada University(CED UGM) contain several dominant harzardous compund such as Cr6+, Cd2+, Zn2+, Hg+, Fe2+, Cu2+, Mn2+, NH4+, NO3-, PO43- and SO42. The dominant and frequently found compound is Cr in a form of Cr6+. CED UGM has had Waste Water Treatment Plant (WWTP) to overcome environmental pollution problem from the waste of each laboratory. This WWTP has 3 steps of processes, those ar

THE EFFECT OF SAND TYPE AND GRAIN SIZE IN SLOW SAND FILTER TO UTILIZE BLACK WATER FOR IRRIGATION

Currently, Indonesia has one of the lowest levels of sewerage connection and sanitation coverage in Asia. Gunung Kidul region in the D.I. Yogyakarta Province is one good example to describe realistic poor sanitation and sewage condition in Indonesia. There are many possibilities to treat wastewate

MODIFIKASI ALAT PENCELUP BATIK SECARA MEKANIS PADA PROSES PEMBUATAN BATIK TULIS UNTUK MENINGKATKAN PRODUKTIVITAS

Batik is a coloration technique that is blocked by wax and uses in textile. At this time, batik from Indonesia has good quality and is preferred by market share in foreign very much. Development and demand for batik every year has enhanced that effect in establishment of many industries in Bantul district, especially. However, the enhancing number of batik industry is currently not matched by enhancing output that be produced, not due to the implementation of technology in their production process. The research will apply technology in one of existing production process in whole process of making batik is still carried out manually. The tool is called a color dyeing tool that serves to give color for batik that has been given wax. The tool is maked to minimize time of production process, especially for coloration time without reducing quality. Furthermore, existence of the tool is expected to enhance profit. The tool has dimension, 1610 mm x 650 mm x 460 mm and made of materials that are easily obtainable in the market. Testing of batik and performance of the color-dyeing-tool that is produced by color-dyeing-tool showed that the color-dyeing-tool can make coloration process more effective and more efficient. This is evidenced by the shorter dyeing process (30 minutes) sothe profit that is earned by the industry becomes 65% greater than those with manual method. Furthermore, color quality produced by this tool is better (smoother, stronger, and more color resistance) than using manual dyeing process