enhanced removal of nh3 during composting by a

Ch 30 Flashcards

In sewage treatment the removal of large objects and particulate matter is achieved during primary and secondary In sewage treatment the removal of phosphates and nitrogen compounds is achieved during advanced treatment If a compost pile is turned frequently and other conditions are adequate for aerobic digestion the composting can be

Composting with additives to improve organic amendments A

Mar 07 2018Biogenic CO 2 emissions during composting derive from organic matter aerobic decomposition and CH 4 oxidation by aerobic methanotrophic bacteria (Snchez-Garca et al 2015) CO 2 is the most abundant gas emitted during composting (Haug 1993) CH 4 emissions are mostly recorded during the initial and thermophilic phases (Beck-Friis et al 2000) due to the formation of

USE OF BIOLOGICAL METHODS FOR REMOVAL OF H2S FROM

Biogas is produced during anaerobic digestion of organic substances by a consortium of microorganisms Biogas consists mainly of methane (CH4 ) and carbon dioxide (CO2) Other gases such as dinitrogen (N2) water vapour (H2 O) ammonia (NH3) hydrogen sulfide (H2S) and other sulfur compounds could also be found therein

Effects of mixing and covering with mature compost on

This study investigated effects of mature compost on gaseous emissions during composting using pig manure amended with corn stalks Apart from a control treatment three treatments were conducted with the addition of 5% (wet weight of raw materials) of mature compost: (a) mixing raw materials with mature compost at the beginning of composting (b) covering raw materials with mature compost

Microbial driven reduction of N2O and NH3 emissions during

May 15 2020The overall trend in the pH increased initially and then decreased (Fig 1b) which was related to the mineralization of nitrogen and the release of NH 3 during the early composting stage The pH may have decreased gradually because the release of H + during the nitrification process was enhanced by microorganisms (Liu et al 2019 Zhang et al 2016)

Effects of mixing and covering with mature compost

During 30-d of composting three treatments with the addition of mature compost could reduce CH4 emission by 53–64% and N2O emission by 43–71% However covering with mature compost throughout the experimental period increased cumulative NH3 emission by 61% although it could reduce 34% NH3 emission in the first 3 d

Enhanced removal of NH3 during composting by a

Aug 15 2010A biotrickling filter (BTF) was used to treat NH 3 emitted from the exhaust gases of cattle manure compost Results of the non-biofilm experiment suggested that NH 3 could not be removed effectively only through biofilm adsorption The absence of NH 4 + bio-oxidation resulted in an increase in free ammonia which had a negative effect on NH 3 removal After biofilm culture NH 3 removal

Assessing microbial population dynamics enzyme activities

Nov 13 2018This study assessed changes in bio-quality indices and plant available P released during aerobic–thermophilic co-composting of different mix ratios of non-reactive ground phosphate rock (GPR) with poultry and cattle manures Aerobic–thermophilic co-composting of different mix ratios (5:5 8:2 7:3 and 9:1) of non-reactive GPR with poultry and cattle manures was carried out Compost piles

Ammonia biofiltration and nitrous oxide generation during

Gas-Phase Biofiltration technology is widely utilized for treating ammonia gas (NH 3) with one of its potential detrimental by-products being nitrous oxide (N 2 O) a potent greenhouse gas (100-y radiative forcing 298 times greater than carbon dioxide) The present work was conducted to investigate the relation between NH 3 removal during biofiltration and N 2 O generation as a product of

Enhanced electro

Mar 02 2018Besides cheaper electrodes used in NH3 product formation during NO degradation by mediated electrochemical reduction (MER) a specific electrode that can perform direct electrochemical reduction (DER) and MER of NO is an added advantage In the present study a Pt electrode was used to examine NO degradation through NH3 formation during the electro-scrubbing process

Removal of Ammonia from Water by Ozone Microbubbles

Dec 27 2012Ammonia is a major source of water pollution One of the most common methods for removal of ammonia from water is oxidation In this work ozonation of ammonia using microbubbles was studied in a pilot plant The experimental results indicate that ozone microbubbles were quite effective in oxidizing ammonia Oxidation of ammonia was effective at high pH and high ozone generation rates

composting ppt

COMPOSTING What is composting ? Composting is a biological transformation of biodegradable waste into water carbon dioxide energy and a composted matter can help to reduce the volume of waste destined for landfill or incineration yields a valuable product that can be used for soil amendment and mulch and when properly processed and cured the compost improves soil nutrients reduces

Reducing ammonia emission from poultry manure composting

May 21 2007A laboratory‐scale experiment was conducted to examine the feasibility of struvite formation during poultry manure composting Magnesium and phosphate salts were supplemented to create favorable conditions to form struvite Results indicated that ammonia emission was reduced by 40% to 84% while the nitrogen retention in compost was enhanced

Biological Nutrient Removal manual

Enhanced biological phosphorus removal (EBPR) The process of phosphorus removal in wastewater that relies on the proliferation and selection of a microbiological population capable of storing phosphorus in excess of their normal growth requirements Also called Biological Nutrient Removal (BNR)

Diversity in the Mechanisms of Humin Formation during

Humins (HMs) play a very important role in various environmental processes and are crucial for regulating global carbon and nitrogen cycles in various ecosystems Composting is a controlled decomposition process accompanied by the stabilization of organic solid waste materials During composting active fractions of organic substances can be transformed into HMs containing stable

NH3 N2O and CH4 emissions during passively aerated

Turning enhanced the rate of drying and degradation The four-month treatment degraded 57 3% of the initial organic matter in the turned piles while only 40 5% in the static piles The turned piles showed low ammonia and N2O emissions 3 9 0 2% and 2 5 0 1% of total initial nitrogen respectively

composting ppt

COMPOSTING What is composting ? Composting is a biological transformation of biodegradable waste into water carbon dioxide energy and a composted matter can help to reduce the volume of waste destined for landfill or incineration yields a valuable product that can be used for soil amendment and mulch and when properly processed and cured the compost improves soil nutrients reduces

Control of Nitrogen Loss during Co

This work studied the effect of basic composting parameters (C/N ratio turning frequency and moisture) initial pH nitrogen source and fermenting agent on nitrogen loss (N-loss) during co-composting of banana stems with chicken manure in order to determine the best composting conditions The experimental results suggested that co-compost with minimum N-loss entails operating at turning

In situ dry cleaning of Si wafer using OF2/NH3 remote

reactant species on the surface and the 2nd step (removal step) is the desorption of reacted compound layers on the surface by lamp heating to ~200 C The thickness of the reacted layer and the removed layers of SiO 2 and Si 3N 4 during the each step of dry cleaning were determined by a field emission-scanning electron microscope

Amino Acids Mineral Nutrients and Efficacy of

Growing medium amino acids and mineral nutrients stimulate rhizosphere activities and plant growth A greenhouse experiment was performed to compare amino acid and mineral nutrient profiles of seafood waste compost (SFWC) and municipal solid waste compost (MSWC) and vermicompost (VC) Their efficacies were also tested on onion ( Allium cepa L "Sweet Utah")

Coffee husk composting: An investigation of the process

Apr 30 2013The reduction in moisture in Piles 1 and 2 can be explained by microbial heat generation causing enhanced desiccation (Rebollido et al 2008) Moisture loss during the composting process can be considered an indicator of the decomposition rate because the heat generation that accompanies decomposition drives evaporation

Subject: compost maturity

Hyperthermophilic pretreatment composting (HPC) is superior to traditional composting (TC) with enhanced compost maturity and accelerated humic substances (HS) formation However the regulators affecting HS formation which is of great importance in evaluating the compost maturity are still unclear

Effect of Co

The highest concentration of NH3 was observed in the treatment of T4 The productions of NH3 were reduced by 36 5% 19 8 % and 21 3 % for T1 T2 and T3 that compared to T4 respectively In terms of H2S control it is suitable to co-composting of kitchen waste and agricultural waste

Reducing nitrogen losses during composting of poultry

Loss of N via NH₃ volatilization during composting of poultry manure reduces the agronomic value of the end-product and contributes to environmental pollution The objectives of this study were to evaluate N losses via NH₃ volatilization during aerobic composting of poultry layer manure examine the potential of natural zeolites to adsorb the volatilized NH₃ during composting and