MESOPHILIC ANAEROBIC DIGESTION OF ANIMAL WASTE AND E.COLI REDUCTION
Journal Title: Topics in Civil, Environmental & Building Engineering (TICEBE) - Year 2017, Vol 1, Issue 2
Abstract
Anaerobic digestion (AD) is one of the preferred method for treating animal wastes, and emphasize of this study is to investigate E. coli reductions in AD system. The AD is widely applied in developing countries such as China and India. The AD has been also used in developed countries such as USA and Germany for treating animal waste, particularly, dairy manure. Both thermophilic (≈50-55 ⁰C) temperature and mesophilic temperature (≈35-37 ⁰C) AD systems are used; however, mesophilic AD is more common than the thermophilic AD because of no requirement for external energy to increase the temperature in mesophilic AD system. The advantages of AD system include the productions of biogas (a source of renewable energy), and digestate (used as a fertilizer). Another benefit of the AD is that it helps in controlling animal waste born pathogen and pathogen indicator (such as E. coli) reductions. Additional studies are needed to investigate E. coli reductions in the AD system. This study was focused on understanding of E. coli reduction in the AD, which was operated in mesophilic temperature conditions. Subsequently, models were developed to calculate E. coli reductions. Two different types of animal manure feedstocks were used for calculating E.coli reduction. In the first feedstock, liquid slurry from solid manure (scrapped manure) was prepared in the lab, while the second feedstock includes flushed dairy manure (i.e., liquid manure) collected from dairy lagoons located in dairy farms. Results of observation and model showed the AD system reduces E. coli level substantially; however, the reduction level depends on the incubation time.
Authors and Affiliations
Yi Wang, Pramod Pandey
Keywords
Related Articles
- EP ID EP411104
- DOI 10.26480/iceti.01.2017.169.171
- Views 41
- Downloads 0
ENGINEERING EXAMPLE OF DYNAMIC COMPACTION REPLACEMENT FOR MISCELLANEOUS FILL FOUNDATION AND ANALYSIS OF TREATMENT EFFECT
There is a layer of miscellaneous fill on the surface at a certain site in Huangshan City which has low strength, high compressibility and poor engineering properties. The dynamic replacement was used to increase its str...
NUMERICAL SIMULATION AND DESIGN OF CONTROL DEVICE FOR COLLECTING COLD ROLLED STEEL STRIP DUST
After coming out from hot rolling machine, the cold rolled steel strip is slowly cooled. Then, the surface of the steel strip is oxidized into oxide scale. After extruding, stretching, bending, straightening and other pr...
RESEARCH ON RISK ASSESSMENT OF THE PPP RAIL TRANSIT PROJECTS BASED ON IMPROVED CUOWGA – SHAPLEY VALUE
The PPP rail transit projects develop rapidly in China, due to its many participants, long construction period, large scale and other characteristics, causing lots of risks in the construction process. It need to evaluat...
ADVANCE OF INVERT SIMULATION METHODS FOR GROUNDWATER POLLUTION SOURCE IDENTIFICATION
Groundwater pollution source identification (GPSI) is an important support of contaminate removing, groundwater protecting, potable water security. As a typical ill-posed problem, GPSI has been studied for thirty years,...
HAZARDS OF HAZE
Haze days in China has occurred frequently in recent years. Severe haze has become the focus of environmental governance. The impact of haze to human beings involves in many aspects, and it not only affects the ecologica...