Effect of retention time and organic loading rate on anaerobic acidification and biogasification of dairy manure

2004-12-01
Demirer, Göksel Niyazi
Chen, S
Vast amounts of animal manure produced from concentrated animal feeding operations have the potential to be converted into economic gain if the proper processing technology is employed. Anaerobic digestion (AD) is an effective way to convert organic wastes including animal manure into profitable by-products as well as to reduce the pollution of water, air, and soil caused by these wastes. Two-phase AD of manure offers several advantages over conventional one-phase AD. Solids reduction through hydrolysis/acidification might be very significant for animal manure which contains high amounts of solids. However, to date, studies of two-phase AD of animal manure have been limited to screened manure. Therefore, this study investigated the two-phase AD of dairy manure with particular emphasis on the effects of retention time and organic loading rate (OLR) on anaerobic acidification and biogasification of unscreened dairy manure. The results indicated that pre-acidification of dairy manure in daily-fed continuously-mixed reactors with no recycle led to significantly high reduction efficiencies of volatile solids and, thus, biogas production in the subsequent methanogenic reactor especially at OLRs of 4-10 g VS dm(-3) day(-1). However, the extent of the stimulation in the biogas production relative to corresponding feed samples was quite variable (between 6.9 and 64.7%) for different solids retention times and OLR combinations. A relatively lower performance was observed for the high OLRs (20-30 g VS dm(-3) day(-1)) used which was attributed to the possible wash-out of the acidifiers at the considerably low retention times (1.25-4 days) used. (C) 2004 Society of Chemical Industry.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

Suggestions

Effect of initial COD concentration, nutrient addition, temperature and microbial acclimation on anaerobic treatability of broiler and cattle manure
Gungor-Demirci, G; Demirer, Göksel Niyazi (2004-06-01)
In this study, anaerobic treatability and biogas generation potential of broiler and cattle manure were investigated. For this purpose, seven sets of anaerobic batch reactor experiments were performed using broiler and cattle manure and their mixtures in five different ratios (100% broiler; 75% broiler, 25% cattle; 50% broiler, 50% cattle; 25% broiler, 75% cattle; 100% cattle). These manure mixtures had two different initial chemical oxygen demand (COD) (12,000 and 53,500 mg/l) concentrations. The effects o...
Effect of high hydrostatic pressure on physicochemical and biochemical properties of milk
Altuner, Ergin Murat; Alpas, Hami; Erdem, Yasar Kemal; Bozoglu, Faruk (Springer Science and Business Media LLC, 2005-10-6)
Interest in high hydrostatic pressure (HHP) applications on milk and dairy products has recently increased as HHP offers a new technology for food preservation to the food industry. Although HHP-induced microbial destruction, rennet or acid coagulation of milk and increase in cheese yield has been reported, the actual effect of HHP application on milk constituents still remains to be unexplained. Therefore, we have analyzed the effect of HHP on physicochemical and biochemical properties such as turbidity, p...
Effect of ozone pretreatment on biogas production and microbial community structure of two-stage anaerobic digesters
Akçakaya, Merve; İçgen, Bülent; Department of Environmental Engineering (2021-2-09)
The amount of sludge produced in treatment plants is increasing depending on the population growth and water consumption. Anaerobic digestion (AD) is a widely used sludge stabilization method in wastewater treatment plants, as it provides volume reduction and methane-rich biogas production. In single-stage anaerobic digestions, the process fails due to volatile fatty acid accumulation and pH changes. To solve this problem, two-stage anaerobic digestion (TSAD) process has emerged t...
Effect of Conditioning Time and Temperature on the Volumetrics and Stability of Dry Process Crumb Rubber Modified Warm Asphalt Mixtures
Öztürk, Hande Işık (2017-11-17)
Environmentally friendly techniques for asphalt mixtures are developed for greater savings in natural resources, energy and economy. This paper focuses on the association of: i) Warm Mix Asphalt (WMA) ii) Dry Process Crumb Rubber (DryCR). WMA is a widely used technology that allows significant reduction in the mixing temperature (MT) and compaction temperature (CT) of the asphalt mixtures. Additionally, they have various acknowledged engineering, environmental and economic benefits. Similarly, CR modificati...
Effect of high hydrostatic pressure on seed germination, microbial quality, anatomy-morphology and physiological characteristics of garden cress (Lepidium sativum) seedlings
İŞLEK, Cemil; Altuner, Ergin Murat; Ceter, Talip; Alpas, Hami (Informa UK Limited, 2013-06-01)
High hydrostatic pressure is a non-thermal food processing technology that is found to increase the percentage of germination, decrease the germination time and improve the microbial quality of seeds. In this study, pressures of 100-400MPa for 10min at 30 degrees C are used to compare the percentage of germination, the microbial quality of seeds, chlorophyll a and b, and total phenolic compounds concentrations in seedlings, and the anatomy-morphology characteristics of garden cress. Enhanced reductions of t...
Citation Formats
G. N. Demirer and S. Chen, “Effect of retention time and organic loading rate on anaerobic acidification and biogasification of dairy manure,” JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, pp. 1381–1387, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51009.