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TINGKAT FILTRASI RUMPUT LAUT (GRACILARIA SP) TERHADAP KANDUNGAN ORTOFOSFAT (P2O5) Komarawidjaja, Wage
Jurnal Teknologi Lingkungan Vol. 9 No. 2 (2008): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

The Concern of this study is to understand Gracilaria sp. function in biofiltration process as a way in removing exceeding nutrient.Laboratory analysis indicated that Gracilaria sp has the ability to reduce organic substance as orthophosphate in see water up to range 0.0082 -00.0149 ppm/days. Application of Gracilaria in waste water filtrattion is expected to be an alternative approach in shrimp pond waste water treatment.

DAMPAK BUDIDAYA PERTANIAN INTENSIF TERHADAP KUALITAS AIR PERMUKAAN DESA KANIGORO KECAMATAN NGABLAK KABUPATEN MAGELANG Komarawidjaja, Wage
Jurnal Teknologi Lingkungan Vol. 12 No. 1 (2011)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Kanigoro at Ngablak Sub-District in Magelang is one of the Villages which is topographically lower than the adjacent village in the same sub-district. The main activity of village inhabitant is farmer in intensive agriculture that is indicated by a lot of fertilizer and pesticide utilization. Therefore, the exceeding dosage of fertilizer and pesticide in plant cultivation could become an anxious environmental problem due to the high concentration of them in springs water that they called as Tuk and river water more than the quality standard of National regulation. Based on Data analysis, it can be concluded that laboratory analysis result of water quality in the village Kanigoro, generally still meet the quality standard. This is showed by the concentration of heavy metals (As, Cu, Cd, Hg, Zn and Fe) and pesticides (Aldrin, BHC, Chlordane, DDT, Dieldrin, Endrin, Heptachlor,Heptachlo epoxide, Lindane, Methoxychlor and Toxaphene), except for some points sampling contain heavy metals plumbum (Pb) exceeded water quality standard of the Minister of Health (Depkes) and Government Regulation ClassÃ‚Â I (raw water) of PP 82/2001. While the density of microbial total coliform and E. coli detected abundant compare to the water quality standard of the Minister of Health, particularly for the use of water as raw water or clean water. However, it is possible to utilize water directly for agriculture and fish farming activities and the use for drinking water after cooked first

PENENTUAN KONSENTRASI KHLOROFIL-Î± SEBAGAI INDIKATOR KUALITAS PERAIRAN WADUK SAGULING Komarawidjaja, Wage
Jurnal Hidrosfir Indonesia Vol 3, No 3 (2008)
Publisher : Jurnal Hidrosfir Indonesia

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Saguling reservoir is one of reservoir located in West Java Province. This reservoir primarily was planned for single purpose to generate the electricity. Water quality in this reservoir is depends on the water quality of Citarum River which have face significant change because of the increased of land use along Citarum River basin. Parameter that tends to increased as well as measured at Saguling reservoir in this study is pH, turbidity and Chlorophyll- . These results are higher than the permissible limit (PP 82/2001). Its mean that Saguling reservoir water quality is worst, and based on chlorophyll- contained 10 g/L is called as eutrophic waters

PENGARUH PERBEDAAN DOSIS OKSIGEN TERLARUT (DO) PADA DEGRADASI AMONIUM KOLAM KAJIAN BUDIDAYA UDANG Komarawidjaja, Wage
Jurnal Hidrosfir Indonesia Vol 1, No 1 (2006)
Publisher : Jurnal Hidrosfir Indonesia

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The objective of the study is to determine the effectiveness of bacterial application and various continuous dissolved oxygen (DO) treatment for nitrogen (ammonia, nitrite and nitrate) degradation in shrimp culture. The DO treatment was set as 4.5 mg/L for treatment-I, 5.5 mg/L for treatment-II and 6.5 mg/L for treatment-III. The batch oxidation was conducted for a period of 20 days. The temperature, pH, salinitas, DO, ammonia, nitrite and nitrate were determined.Based on some previous research papers. NH3 becomes toxic to shrimp if the concentration is higher than 0.54mg/Lr. NH3 measurement on this experiment was about 0.01 mg/L up to 2.5 mg/L, but frequently was found lower than 0.54 mg/L in the pond under treatment-III (6.5 mg/L DO).The result also indicates that nitrification process in the experiment pond was not only depend on DO level and abundance of nitrifier, but also was influenced by a possibility of the occurrence of organic compound that inhibit nitrification.

POTENSI MIKROBA PENITRIFIKASI KAWASAN PERTAMBAKAN UDANG TANJUNG PASIR, TANGERANG Wage Komarawidjaja; Hanies Ambarsari
Jurnal Teknologi Lingkungan Vol. 2 No. 3 (2001): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

High concentration of ammonia in shrimps pond sediment due to the accumulation of feed excessive will become negative impact to the shrimp culture. Therefore, increasing the indigenous microbial abilities in minimizing toxicity effect of ammonia through biotransformation of ammonia into nitrite and nitrate is very important for shrimp growth and health.Isolation and identification of nitrifying microbes has been done. The number of microbes isolated form shrimps pond are six namely 2p, 2k, 3p, 1p, 3k, and 2. The number of isolated microbes in aquaculturing pond (T-bd) is five and in post harvest pond (T-pp) is three.In T-bd samples, autotroph nitrifying microbes are 2(k), 2(p) and 3(p), but 1(p) and 3(k) as heterotroph nitrifying microbes. And in T-pp samples, autotroph nitrifying microbe is 3(p), except 2 and 3(k) as heterotroph nitrifying microbes. The rank of effectivness In nitrifying activity is 2k, 3p and 2p respectively.

PENGARUH APLIKASI KONSORSIUM MIKROBA PENITRIFIKASI TERHADAP KONSENTRASI AMONIA (NH3) PADA AIR TAMBAK Wage Komarawidjaja
Jurnal Teknologi Lingkungan Vol. 4 No. 2 (2003): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

An experiment on the utilization of nitrifying bacteria in shrimps pond ecosystemwas conducted in the village of Grinting, Brebes Regency. This experiment hastwo treatment ponds. Pond A was put nitrifying bacteria on as a treatment andpond B was without its treatment. The impact of the treatment was indicated by ammonia concentration measured, in which pond A was lower than pond B. In other words proved that nitrification process in pond A ecosystem was accelerated by the addition of nitrifying bacteria.

PELUANG PEMANFAATAN RUMPUT LAUT SEBAGAI AGEN BIOFILTRASI PADA EKOSISTEM PERAIRAN PAYAU YANG TERCEMAR Wage Komarawidjaja
Jurnal Teknologi Lingkungan Vol. 4 No. 3 (2003): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Some observation result said that the worst of enviromental uality happened is primarily caused by mislead in the aim of develoment nature resources that only concern to economic growth. Therefore, the develoment of brakisth water ecosystem as an economic growth region should be relatedto the goal of enviromental waters uality management. To enhance this goal, the people utilizing brakish water ecosystem as aquaculture site may reduce organic pollution that is producedby their activities. Integrationof Gracilaria sp as a biofilter agent in aquaculture pond or in the wastewater treatment system is an alterantivetechnology for waters quality recovery enhancement.The initial success of this method in some countries has been reported. Therefore, if the biofiltration process in reducing organic pollution run properly, waters pollution in certain brakish ecosystemmaybe reduced.

PENELITIAN PENGARUH PEMANFAATAN KONSORSIUM MIKROBA PENITRIFIKASI DALAM BUDIDAYA UDANG Wage Komarawidjaja
Jurnal Teknologi Lingkungan Vol. 5 No. 1 (2004): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Research on application of consortia of Nitrifying bacteria on shrimp culture wasconducted in Grinting, Brebes, Central Java . The experiment method usedconsortia of nitrifying bacteria as a sole treatment on Pond A and Pond B as acontrol. Intensive observation on some water qualities parameter such astemperature, salinity, pH and turbidity was conducted during shrimp culturalperiod. The research result is indicated by distinction of survival rate (SR)between Pond A and Pond B. The SR for Pond A is greater (32,5%) than inPon B (14%), but it is still low SR for aquaculture activity.

KONTRIBUSI LIMBAH DETERJEN TERHADAP STATUS KEHIDUPAN PERAIRAN DI DAS CITARUM HULU Wage Komarawidjaja
Jurnal Teknologi Lingkungan Vol. 5 No. 3 (2004): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Soap is defined as compound of fats, fatty acids and caustics soda. Thesecompounds work to reduce surface tension and increase its cleansing ability. The term “detergent” usually refer to synthetics compounds, but has broader ability, not only reducing surface tension and increasing its cleansing ability but also has softening and emulsifying ability.Unfortunately, detergent in certain concentration can harm to aquatic organism such as plankton, mussel, mollusk and fish. In bioassays test, high detergent concentrations induced mortality in gill cells and reduced filtration rate of the mussel. In some report cited said that concentrations above 0.2 mg/L of anionic detergent already elicited detrimental, and sub-lethal effects in all test organisms.Therefore, in upper Citarum Catchments Area which has detergent concentration significantly above 0.2 mg/L could harm to sessile invertebrate organisms. And in the long period it may influence the diver and abundance of aquatic organisms.

STATUS KUALITAS AIR WADUK CIRATA DAN DAMPAKNYA TERHADAP PERTUMBUHAN IKAN BUDIDAYA Wage Komarawidjaja
Jurnal Teknologi Lingkungan Vol. 6 No. 1 (2005): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Waduk Cirata is multipurpose cascade dam that lay in the middle of Citarumwatershed. Based on some reports, the water quality of this dam significantlydecreased to bad condition. This condition may be harmful to some equipmentsgenerating electricity power and also aquaculture product utilizing cages (KJA).The result of intensive observation during carps (Cyprinus carpio) culture periodconcluded that its aquaculture water changed into polluted called Eutrophicenvironment. There is correlation between eutrophication and lack growth of fishes in some cages. It is indicated by dominant increase of fish length than the increase of the weight of fish which is called as a negative allometric of fish growth.

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