Performance of Anaerobic Digestion of Chicken Manure Under Gradually Elevated Organic Loading Rates

Zhang, Congguang; Wang, Fei; Pei, Mengfu; Qiu, Ling; Qiang, Hong; Yao, Yiqing

doi:10.3390/ijerph16122239

Cited by 38 publications

(25 citation statements)

References 43 publications

(50 reference statements)

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“…These nonpoint sources of pollution can be effectively controlled and remediated by cleaner production and green technologies. For instance, the manure and wastewater from livestock operation can be converted to bioenergy (e.g., biomethane) through various types of green technologies, such as anaerobic digestion [20,21]. With the combination of real-time monitoring system, the physico-chemical properties of the nonpoint source pollution can be efficiently determined to provide useful information for subsequent treatments and/or controls.…”

Section: Implications To Ensuring the Safety Of Irrigation Watermentioning

confidence: 99%

Establishment of an Automatic Real-Time Monitoring System for Irrigation Water Quality Management

Syu

Chang

Pan

2020

IJERPH

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In order to provide the real-time monitoring for identifying the sources of pollution and improving the irrigation water quality management, the integration of continuous automatic sampling techniques and cloud technologies is essential. In this study, we have established an automatic real-time monitoring system for improving the irrigation water quality management, especially for heavy metals such as Cd, Pb, Cu, Ni, Zn, and Cr. As a part of this work, we have first provided several examples on the basic water quality parameters (e.g., pH and electrical conductance) to demonstrate the capacity of data correction by the smart monitoring system, and then evaluated the trend and variance of water quality parameters for different types of monitoring stations. By doing so, the threshold (to initiate early warming) of different water quality parameters could be dynamically determined by the system, and the authorities could be immediately notified for follow-up actions. We have also provided and discussed the representative results from the real-time automatic monitoring system of heavy metals from different monitoring stations. Finally, we have illustrated the implications of the developed smart monitoring system for ensuring the safety of irrigation water in the near future, including integration with automatic sampling for establishing information exchange platform, estimating fluxes of heavy metals to paddy fields, and combining with green technologies for nonpoint source pollution control.

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Section: Implications To Ensuring the Safety Of Irrigation Watermentioning

confidence: 99%

Establishment of an Automatic Real-Time Monitoring System for Irrigation Water Quality Management

Syu

Chang

Pan

2020

IJERPH

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“…"The results showed that the biogas yield increased with increasing OLR, which was based on the volatile solids (VS), before reaching up to 11.5 g VS/(L•d), while the methane content was kept relatively stable and maintained at approximately 60%. However, when the VS was further increased to 11.5 g VS/(L•d), the total ammonia nitrogen (TAN), pH, and alkalinity (CaCO 3 ) rose to 2560 mg•L −1 , 8.2, and 15,000 mg•L −1 , respectively, while the volumetric biogas production rate (VBPR), methane content, and VS removal efficiency decreased to 0.30 L•(L•d) −1 , 45%, and 40%, respectively " [20].…”

Section: Introductionmentioning

confidence: 99%

“…The performance of chicken-manure-based AD at gradient organic loading rates (OLRs) in a continuous stirred tank reactor (CSTR) was investigated 150 days [20]. "The results showed that the biogas yield increased with increasing OLR, which was based on the volatile solids (VS), before reaching up to 11.5 g VS/(L•d), while the methane content was kept relatively stable and maintained at approximately 60%.…”

Section: Introductionmentioning

confidence: 99%

Broiler house litter processing by anaerobic digestion using enzymes

2020

Biointerface Res Appl Chem

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Sawdust is used as litter for broiler chickens. Mostly they are taken from the treatment of low-value deciduous trees. Keeping broilers for 40-50 days on a litter of sawdust, all the time, absorbs moisture well and mixes with bird droppings. When the broilers are moved to the slaughterhouse, these littered manures are removed from the barn and stored in stacks. They can be used to fertilize fields but only once or twice a year when the fields are fertilized, so they need to be spread over large areas and must be covered due to unpleasant odors. The other alternative is to use this manure with litter to produce energy, preferably biomethane. Sawdust is rich in lignin, cellulose and hemicellulose and is therefore slowly and incompletely broken down by bacteria. This study investigated the effects of the use of the enzymes alpha amylase and xylanase as well as the biocatalyst Metaferm on the mixture of bird droppings and sawdust actually produced in broiler houses. The 14 bioreactors of the laboratory were filled with raw materials and the appropriate additives were added. An average of 0.349 Lg-1dom methane was obtained from bioreactors where alpha amylase was added, but 0.368 Lg-1dom methane was added to xylanase. From the bioreactors where the biocatalyst Metaferm was added average yield was 0.329 Lg-1dom of methane. Addition of enzymes improved methane production, but the addition of biocatalyst Metaferm showed no improvement compared to control bioreactors.

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“…Utilization of protein-rich substrates, such as kitchen waste, poultry manure, microalgae, green legumes, oilseeds, etc. may lead to high concentrations of nitrogen (N) in the reactor during anaerobic digestion (AD) [1][2][3][4]. High concentrations of N inside the reactor negatively affect process stability and efficiency due to ammonia formation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Increasing Nitrogen Content on Process Stability and Reactor Performance in Anaerobic Digestion

Morozova¹,

Nikulina²,

Oechsner³

et al. 2020

Energies

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The aim of this study was to analyse the effect of different nitrogen increase rates in feedstock on the process stability and conversion efficiency in anaerobic digestion (AD). The research was conducted in continuously stirred tank reactors (CSTR), initially filled with two different inocula: inocula #1 with low and #2 with high nitrogen (N) concentrations. Three N feeding regimes were investigated: the “0-increase” feeding regime with a constant N amount in feeding and the regimes “0.25-increase” and “0.5-increase” where the N concentrations in feedstock were raised by 0.25 and 0.5 g·kg−1, respectively, related to fresh matter (FM) every second week. The N concentration inside the reactors increased according to the feeding regimes. The levels of inhibition (Inhibition) in specific methane yields (SMY), related to the conversion efficiency of the substrates, were quantified. At the N concentration in digestate of 10.82 ± 0.52 g·kg−1 FM measured in the reactors with inoculum #2 and “0.5-increase” feeding regime, the level of inhibition was equal to 38.99% ± 14.99%. The results show that high nitrogen increase rates in feeding regime are negatively related to the efficiency of the AD process, even if low volatile fatty acid (VFA) concentrations indicate a stable process.

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Performance of Anaerobic Digestion of Chicken Manure Under Gradually Elevated Organic Loading Rates

Cited by 38 publications

References 43 publications

Establishment of an Automatic Real-Time Monitoring System for Irrigation Water Quality Management

Establishment of an Automatic Real-Time Monitoring System for Irrigation Water Quality Management

Broiler house litter processing by anaerobic digestion using enzymes

Effects of Increasing Nitrogen Content on Process Stability and Reactor Performance in Anaerobic Digestion

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