A. Haris
Jurusan Kimia, Fakultas Sains dan Matematika Universitas Diponegoro

Published : 3 Documents

Found 3 Documents

Jurnal Air Indonesia Vol 6, No 1 (2010): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jai.v6i1.2443


Two stage high rate anaerobic treatment systems comprising of an acidogenic reactor (or equalisation/ buffer tank) followed by a methanogenic reactor are becoming increasingly popular to treat high strength wastewater from industries.  In these systems, sulphate present in the wastewater is reduced to sulphide either partially or completely in the acidogenic reactor and completely in the methanogenic reactor.  The effect of fermentation products on the extent of sulphate reduction in the acidogenic reactor was investigated in a continuously-fed, well mixed laboratory-scale 3 L fermenter operating at a temperature of 35oC and pH of 6.  The feed was based on either glucose or molasses as the carbon source.  It was observed that as the carbohydrate concentration in feed was increased sulphate reduction was suppressed.  It was confirmed that volatile organic acids like acetic, propionic and butyric acids, hydrogen and residual glucose did not cause inhibition of sulphate reduction.  However, biomass concentration correlated negatively with extent of sulphate reduction.  This correlation was expressed mathematically and the same expression with the same parameters adequately predicted the effect of biomass concentration on extent of sulphate removal for both steady state and transient data irrespective of glucose or molasses feed.  It was seen from the best fit of this expression that a biomass concentration of 3300 mg-COD.L-1 would completely repress sulphate reduction in the acidogenic reactor.  Even when sulphate removal was suppressed the presence of sulphate reducing bacteria (SRB) in the reactor was confirmed through Fluorescent In Situ Hybridisation (FISH) visualisation.  Moreover, the numbers of SRB seemed to increase with carbohydrate concentration in feed.  It was speculated the suppression of sulphate removal might be due to a switch in function of SRB from sulphate reducing to fermentation or acetogenesis.    Keywords: sulphate reducing bacteria, anaerobic digestion, inhibition, sulphate reduction, acidogenic reactor, high rate anaerobic treatment
PENGAYAAN YODIUM DAN KADAR NACL PADA GARAM KROSOK MENJADI GARAM KONSUMSI STANDAR SNI ENRICHMENT OF IODIUM AND SODIUM CLORIDE IN THE TRADITIONAL SALT BECOME CONSUMTION SALT INS STANDARD Nur, M.; Marhaendrajaya, I.; Sugito, Sugito; Windarti, T.; Arnelli, Arnelli; Hastuti, R.; Haris, A.; Rahmanto, W. H.; Widodo, Didik Setiyo; Ariyanto, F.; Muhlisin, Z.; Suseno, J. E.; Setiawati, E.; Sutanto, H.; Priyono, Priyono; Izzati, M.; Hariyati, R.; Tana, S.; Raharjo, B.; Ispriyanti, D.; Farikhin, Farikhin; Rusgiyono, A.; Suhartono, Suhartono
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 1 Year 2013

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3994.464 KB)


This research has been carried out in the quality improvement of traditional salt (krosok salt) into salt consumption for the Indonesian National Standard. This report is devoted to the elevated levels of NaCl and KIO3. Increased levels of NaCl and Iodine (represented by KIO3) is done by washing the salt with the traditional clothes washer with two rounds and by using water with saline solution at 22-24 Be (known as the old water). Traditional salt taken from three districts, such as Pati District, Jepara District, and Rembang District. We found that the concentration of NaCl in the treatment salt maximum is  96 % and Iodium or present of KIO3 is 40 ppm.   Key words: Salt,  traditional, INS, Consumtion, NaCl, KIO3
The Influence of Drawing Therapy on the Hospitalization Anxiety Level of Children (3-5 Years) Rahmad, Indra; Jubair, Jubair; Haris, A.
Health Notions Vol 2, No 10 (2018): October
Publisher : Humanistic Network for Science and Technology (HNST)

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