1.Heat-alkaline treatment of excess sludge and the potential use of hydrolysate as nitrogen source for microbial lipid production.
Jingyang XU ; Takahiro OURA ; Dehua LIU ; Susumu KAJIWARA
Chinese Journal of Biotechnology 2011;27(3):482-488
To recover and use protein resources in excess sludge and decrease the cost of microbial lipid production, heat-alkaline was used to treat the sludge, and the hydrolysate was preliminarily used as nitrogen source to cultivate Rhodosporidium toruloides AS 2.1389 for lipid accumulation. Firstly, we treated the excess sludge under different alkaline conditions (pH 10, pH 12, pH 13) within the reaction time of 5-10 h to investigate the effect of nitrogen source release. Secondly, we used the sludge hydolysate to culture R. toruloides AS, and test the effect on cell growth. Results showed that treatment of excess sludge at pH 13 for 5 h was the most effective for nitrogen release. However, the hydrolysate obtained at pH 10 (5 h) was the most suitable for culturing R. toruloides AS, and under this condition, the inner-cellular lipid content could reach 35% of the total biomass weight.
Alkalies
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chemistry
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Biofuels
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Culture Techniques
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methods
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Fermentation
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Hot Temperature
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Lipids
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biosynthesis
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Nitrogen
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chemistry
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Sewage
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chemistry
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Yeasts
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growth & development
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metabolism
2.Treatment of Acute Renal Failure Following Cardiovascular Operation Using Extracorporeal Circulation. Comparison between Continuous Peritoneal Dialysis(CPD) and Continuous Arterio-Venous Hemofiltration(CAVH).
Ichiya YAMAZAKI ; Jiroh KONDOH ; Kiyotaka IMOTO ; Hirokazu KAJIWARA ; Kazumi HOSHINO ; Akira SAKAMOTO ; Shin-ichi SUZUKI ; Susumu ISODA ; Masanori ISHII ; Akihiko MATSUMOTO
Japanese Journal of Cardiovascular Surgery 1993;22(1):14-20
There were 16 patients who developed acute renal failure (ARF) follwing cardiovascular operation using extracorporeal circulation. They were treated by either CPD or CAVH because their ARF were resistant to medical treatment. These patients were divided into three groups according to their treatment; 7 patients treated by CPD (Group A), 5 patients treated both CPD and CAVH (Group B), 4 patients treated by CAVH (Group C). The survival rate was 33% in Group A, 20% in Group B, and 0% in Group C. The prognosis of the each group was poor. CPD and CAVH were effective to control the concentration of serum potasium and water removing. But CPD and CAVH were not very effective to control the concentrations of serum creatinine and blood urea nitrogen. There were three patients who developed low proteinemia which was one of the side effects of CPD. Seven of nine patients treated by CAVH, developed bleeding. The side effects of CAVH were seemed to be more severe than those of CPD.
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