Distribution of Ammonia Assimilating Bacteria In the Composting Process

Nonaka

J Ind Microbiol Biotechnol

et al. 2006

Self Cite

We isolated ammonia-assimilating microorganisms from the livestock manure treatment systems and evaluated their ammonia-assimilating ability. Many isolates utilized ammonia at high rates when they were purely cultivated in a nitrogen-limited medium to which sterilized lagoon extract had been added. Some isolates that were immobilized in polyvinyl alcohol (PVA) utilized ammonia present in the media containing viable lagoon microorganisms. Staining with 4',6'-diamidino-2-phenylindole (DAPI) indicated that the immobilized high ammonia-assimilating isolates grew dominantly within the PVA beads. High ammonia-assimilating isolates in the mixed culture containing viable lagoon microorganisms were identified as Pseudomonas spp. and member of Rhizobiaceae species by partial sequencing of the 16S ribosomal DNA.

Section: Discussioncontrasting

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ammonia removal from livestock wastewater by ammonia-assimilating microorganisms immobilized in polyvinyl alcohol

Nonaka

J Ind Microbiol Biotechnol

et al. 2006

Self Cite

Bioscience, Biotechnology, and Biochemistry

“…21,31,32) However, this reaction has been evaluated and discussed as the response of the total microbial community to the addition of carbon sources to compost materials, in studies that have been conducted concerning the reduction of NH 3 emissions or nitrogen loss during composting. 15,16) Although some microorganisms that assimilate NH 4 + -N were isolated from composts or wastes being composted, 22,[33][34][35] the utilization of these microorganisms to reduce NH 3 emissions during composting has been little examined.…”

Section: Discussionmentioning

confidence: 99%

Utilization of Bacillus sp. strain TAT105 as a biological additive to reduce ammonia emissions during composting of swine feces

Kuroda

Yasuda

Fukumoto

et al. 2015

Bacillus sp. strain TAT105 is a thermophilic, ammonium-tolerant bacterium that grows assimilating ammonium nitrogen and reduces ammonia emission during composting of swine feces. To develop a practical use of TAT105, a dried solid culture of TAT105 (5.3 × 109 CFU/g of dry matter) was prepared as an additive. It could be stored for one year without significant reduction of TAT105. Laboratory-scale composting of swine feces was conducted by mixing the additive. When the additive, mixed with an equal weight of water one day before use, was added to obtain a TAT105 concentration of above 107 CFU/g of dry matter in the initial material, the ammonia concentration emitted was lower and nitrogen loss was approximately 22% lower in the treatment with the additive than in the control treatment without the additive. The colony formation on an agar medium containing high ammonium could be used for enumeration of TAT105 in the composted materials.

IOP Conf. Ser.: Earth Environ. Sci.

“…At the end of composting, the pH of the stack was 7.33. Ammonia nitrogen content was an important indicator of composting and reacted the composting progress [6]. NH 4 + -N content was showed in Figure 4.…”

Section: Variation Of Ph Ammonia Nitrogen and Total Phosphorusmentioning

confidence: 99%

Research on Aerobic Composting Using Biological Enhanced Dewatered Sludge

Duan

Zhao

2018

Abstract. Aerobic composting experiment was carried out by using bio-enhanced dewatered sludge as raw material. The experiment was carried out on the aerobic composting of sludge and crop conditioner. Studied on the changes of physical and chemical indexes in the process of composting. The results showed that the temperature of stack rose rapidly in the initial stage, it could be maintained at high temperature stage (>50℃) for 5 days; at the end of composting, the water content of stack decreased to 37.35%, the sludge reduction effect was remarkable; the organic matter of the stack was 40.28%, pH value rose to 7.33; ammonia nitrogen and total phosphorus increased by 548.4% and 60.6%, compared with those before composting, the nutrient index has been improved; sludge physical and chemical indexes, nutrient indexes and pollutant indexes all meet the regulations, the composted sludge could be used for landscaping. IntroductionBy the end of March 2016, more than 3,910 sewage treatment plants have been built in towns and cities in China, sewage treatment capacity has reached 167 million m³/d, the sludge was produced in 3,000-4,000 t/ years (the rate of water content was 80%). It was expected to 2020, sludge production in China will reach 6,000-9,000 t/ years. If the large number of sewage sludge can not get standardized disposal, it was likely to cause secondary pollution to the environment, therefore, in order to avoid the environmental pollution, sludge must be disposed [1]. Biological enhanced dewatered of sludge originated from microbial hydrometallurgy [2], compared with the conventional physical dewatered technology, it had the advantages of high removal rate of heavy metals, the organic matter and calorific value of the sludge almost unchanged, and the operating costs was low. After microorganism dewatered treatment, the water content of sludge cake, which produced by pressure filtration of excess sludge was less than 60%. In this study, we used rice husk and straw as conditioning agent and bioenhanced dewatered sludge cake for aerobic composting [3], studied on the effect of composting, and appraised the feasibility of applying composted sludge in landscaping.