Judul: Kemampuan Sistem Lumpur Aktif untuk Memperbaiki Kualitas Air Buangan Tambak Udang
Abstrak: Sistern Lumpur aktif merupakan salah satu sistem pengolahan air buangan secara biologis, yang prosesnya bergantung pada aktivitas rnetabolisme mikroorganisme dalam menghasilkan bahan organik terlarut dan tersuspensi. Selanjutnya diubah menjadi bentuk padat yang dapat terendap olehmonokulasi biologis rnik'roorganisme. Bahan organik yang terdapat dalam air buangan tambak udang dapat distabilkan melalui proses pengolahan secara biologis dalam sistem Lumpur Aktif.
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Judul: Evaluasi Kinerja Kolam Aerob Menggunakan Lumpur Aktif Pada Proses Penanganan Limbah Domestik Black Water
Abstrak: PT. XYZ memiliki instalasi pengolahan air limbah menggunakan lumpur aktif yang dinilai kurang efisien, sehingga perlu dilakukan upaya untuk meningkatkan efisiensi kolam lumpur aktif. Tujuan proyek ini adalah mengevaluasi penanganan air limbah dan mendapatkan solusi alternatif untuk meningkatkan kinerja agar mencapai efisiensi teknis. Analisa dilakukan terhadap karakteristik pada limbah di kolam lumpur aktif (MLSS, F/M, umur lumpur) serta BOD, pH dan TSS pada outlet kolam lumpur aktif. Berdasarkan perbandingan data kinerja pengolahan limbah domestik yang ada dengan pustaka, diperoleh solusi untuk meningkatkan efisiensi teknis dan menurunkan biaya penanganan lumpur yaitu dengan mengurangi jumlah lumpur aktif
Keyword: Lumpur aktif, efisiensi teknis, solusi alternatif

Judul: Distribution and Diversity of Ectoparasite Mites on Geckos in Indonesia
Abstrak: Data on the diversity and dispersal of parasitic mites on house geckos in Indonesia are very scarce. In this work, the distribution and diversity of mites living on three species of house geckos, namely Cosymbotus platyurus, Hemidactylus frenatus, and H. garnotii collected throughout Indonesia, has been elaborated. Geckos and mites were captured and immediately preserved in 70% ethanol. Whole mount of the mites was prepared by clearing in lactophenol followed by mounting on polyvinyl lactophenol solutions. The SEM preparation was conducted to examine the detail morphological characters of the mites. The results showed that among 448 individuals of geckos, 221 geckos were infected by Geckobia mites. Prevalences of C. platyurus, H. frenatus, and H. garnotii infested by mites were 14.8%, 50.69%, and 79.6%, respectively. Three different spesies of Geckobia (G1, G2, and G3) could be differentiated; and based on similarities of their morphological characters to ones described in published literatures, Geckobia G2 is Geckobia glebosum and Geckobia G3 is Geckobia bataviensis while G1 could not be identified to the species level. The highest mean intensity of Geckobia G1 infestation was found on H. garnotii (I=7.0), G. glebosum infestation on H. frenatus (I=3.5), and G. bataviensis infestation on H. garnotii (I=11.8). In general, C. platyurus was infested by the least number of mites. Geckobia G1 were found living on the skin folds on the claws, G. glebosum were found mainly on the body and thigh, and G. bataviensis were found on almost all parts of the host’s body. Geckobia mites are distributed randomly throughout Indonesian Archipelago, following the pattern of distribution of their hosts. So it is concluded that Geckobia G1, G. glebosum, and G. bataviensis are sympatric.
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