THE aerobic decomposition of plant materials has in recent years attracted much attention, on account of its importance in the formation of synthetic manure, in the decomposition of soil organic matter, in the purification of sewage and trade wastes, in the decay of wood etc., but comparatively little is known regarding the course and rate of decomposition under anaerobic an,d partially aerobic...

21 22 The objective of this study was to identify a microbial marker for pig manure contamination. 23 We quantified the persistence of four dominant bacterial groups from the pig intestinal tract 24 throughout manure handling in ten livestock operations (including aerobic digestion) using 25 molecular typing. The partial 16S rRNA genes of Bacteroides-Prevotella, Eubacterium26 Clostridiaceae, Ba...

We present the first data on the effect of hypoxia on the specific dynamic action (SDA) in a teleost fish. Juvenile cod (Gadus morhua) were fed meals of 2.5% and 5% of their wet body mass (BM) in normoxia (19.8 kPa Po(2)) and 5% BM in hypoxia (6.3 kPa Po(2)). Reduced O(2) availability depressed the postprandial peaks of oxygen consumption, and to compensate for this, the total SDA duration last...

Abstract A variety of organic feedstocks can be used for anaerobic digestion, resulting in digestates with different compositions, affecting the fertiliser value. Therefore, two experiments were conducted to assess (1) differences nitrogen (N) value seven from a 2-year field experiment spring wheat, and (2) degradability matter (OM) within an aerobic incubation experiment. In field, mineral equ...

the effect of temperature on the main feeding parameters of mnemiopsis leidyi from the southern caspian sea was studied in 2002. the clearance rates and daily rations were estimated from laboratory experiments in a wide range of temperatures from 12 to 27 ?c for m. leidyi of 12?17 mm in length. clearance rate values changed from 52.5 to 107.3 ml ind-1 h-1. the coefficient q10 in temperature 12 ...

the effect of organic loading rate (olr) provided by hydraulic retention time (hrt) and influent chemical oxygen demand (codin) on the performance of an up-flow anaerobic sludge fixed film (uasff) bioreactor treating palm oil mill effluent (pome) was studied. anaerobic digestion of pome was modeled and analyzed with two variables i.e. hrt and codin. experiments were conducted based on a general...

Ozone oxidation was applied to a fraction (30 %) of the return activated sludge (RAS) full-scale Wastewater Treatment Plant for reducing high production (20 t/week). The amount sent final disposal decreased by 50 % and 75 at 0.55 kgO3/h 0.80 dosage, respectively. When same ozonation system aerobic digestion (0.06, 0.50, 0.67 kgO3/h), reduction 27–77 %. A thorough economic analysis carried out c...