Abstract Phosphorus (P) is a nonrenewable resource that can be recycled from high nutrient (N and P)‐containing wastewaters as struvite has 5.7% N 12.5% P, lower heavy metal content, sparingly soluble in water, highly organic acids, devoid of pathogens, non‐toxic, leach nutrients very slowly for longer periods compared with mineral fertilizers quickly. Leaching enhanced by soil nitrification rates, powdered form, mixing soil, whereas leaching decreased application on surface granulation....

Moisture content influences physiological characteristics of microbes and physical structure solid matrices during composting animal manure. If moisture is maintained at a proper level, aerobic microorganisms show more active oxygen consumption due to increased microbial activity. In this study, optimum levels for two bedding materials (sawdust, rice hull) different mixtures beef manure (BS, Beef cattle manure+sawdust; BR, manure+rice were determined based on uptake rate measured by pressure...

Struvite recovered from waste streams is considered as a sustainable alternative to commercial phosphate (P) fertilizers manufactured P rock. In this study, struvite was swine wastewater and pre-treated air-dried material (AM), microwave irradiated (MM), oven-dried (OM), incinerated (IM) reduce the moisture content. Based on their solubility crystalline nature, AM IM were selected for further experiments. The nutrient leaching loss fertilizing value of evaluated in comparison fused...

Struvite crystallization using fluidized bed reactors (FBRs) is one of the most commonly used methods for nutrient recovery from different waste streams. However, struvite swine wastewater containing much higher solids FBR has not been studied extensively. In this study, we therefore designed and optimized key operating conditions parameters, i.e., pH (9.0, 9.5, 10.0), circulation rate (CR) (1.5, 3.0, 4.5 L/Lreactor·h), hydraulic retention time (HRT) (1, 3, 5 h) to ensure efficient removal...

Objective Along with increasing livestock products via intensive rearing, the accumulation of manure has become a serious issue due to fact that there is finite land for recycling composting. The nutrients from accumulate on agricultural and excess disembogues into streams causing eutrophication. In order systematically manage nutrient loading land, quantifying amount according their respective sources very important. However, lack research concerning loss during composting or storage farms....

In this study, a novel treatment approach combining biological treatment, struvite crystallization, and electrochemical was developed its efficiency for the simultaneous removal of pollutants recovery nutrients from high strength swine wastewater (SWW) verified. For all parameters, maximum efficiencies in lab-scale test were obtained range 93.0-98.7% except total solids (TS) (79.4%). Farm-scale process showed overall nitrogen (TN), phosphorus (TP), soluble organic carbon (sTOC), color as...

The treatment of livestock fatalities caused by epidemic diseases must be timely. Simultaneously, the contaminated excreta and bedding materials also treated on site without removal. composting manure with bulking is widely used farm, temperature during reaches over 60°C under appropriate conditions moisture oxygen, a suitable carbon to nitrogen ratio. These characteristics can applied degradation dead livestock. Hence, this study was conducted evaluate degradability mortalities material...

Swine manure in Korea is separated into solid and liquid phases which are composted separately then applied on land. The nutrient accumulation soil has been a big issue but the basic investigation about input arable land not achieved detail. Within production from livestock at national level, most values calculated by multiplication of number animals with excreta unit per animal. However, actual amount nutrients swine may be totally different to since breeding systems same each country. This...

The agricultural sector is considered one of the major sources greenhouse gas (GHG) emissions globally. livestock industry as a significant contributor, accounting for about 18% GHG measured in carbon dioxide (CO2) equivalent from practices. Depending on farming practices and climatic conditions, GHGs such methane (CH4) nitrous oxide (N2O) agriculture can vary significantly. Country-specific emission factors are, therefore, needed precise estimation to avoid uncertainties. This study was...

Poultry breeding has increased by 306% in Korea, inevitably increasing the production of manure which may contribute to environmental pollution. The nutrients (NP) are essential for crop cultivation and soil fertility when applied as compost. Excess from can be accumulated on land lead eutrophication. Therefore, a nutrient load finite should calculated. This study calculates Korean poultry investigating 11 broiler 16 laying hen farms. was composted using deep litter composting while layer...

This study aimed to estimate genetic correlation between carcass grading and retail productivity traits the correlated response on through selection for in order assess efficacy of indirect selection. Genetic parameters were estimated with data from 4240 Hanwoo steers using mixed models, phenotypes included weight (CWT), back fat thickness (BFT), eye muscle area (EMA), marbling (MAR), lean yield percentage (ELP) as traits, portion cuts (RCW RCP), trimmed fats (TFW TFP) bones (TBW TBP)...

A growth trial was conducted to determine the optimal incorporation level of dietary magnesium hydrogen phosphate (MHP, MgHPO4), which manufactured from swine manure and phosphorus (P), required by juvenile far eastern catfish (Silurus asotus). Graded MHP 0.5%, 1.0%, 1.5%, 2.0%, 2.0% monocalcium (MCP) each added basal diet (control) in lieu cellulose become range available P (AP) 0.4% 0.8% diets were designated as control, MHP0.5, MHP1.0, MHP1.5, MHP2.0, MCP, respectively. Control contained...

In order to prepare for the regulation about limit of manure production, status management and amount nutrients in compost discharged from Hanwoo breeding farm shall be known. This study aimed find practical (volatile solids, VS; total nitrogen, T-N; phosphorus, T-P) manure, samples collected 40 farms loss was calculated during composting period, which supports develop nutrient loading coefficients (NLCs) each nutrient. Although addition bedding materials caused increase VS before...

Milking center wastewater (MCW) has a relatively low ratio of carbon to nitrogen (C/N ratio), which should be separately managed from livestock manure due the negative impacts nutrients and harmful effects on down-stream in process with respect microbial growth. Simultaneous nitrification denitrification (SND) is linked inhibition second reduces around 40% carbonaceous energy available for denitrification. Thus, this study was conducted find optimal operational conditions treatment MCW using...

In this study, an attempt was made to develop a real-time control strategy using oxidation–reduction potential (ORP) and pH (mV) time profiles for the efficient operation of bio-liquor circulation system (BCS) in swine farms its effectiveness reducing odor emission through improving manure properties slurry pit evaluated. The lab-scale BCS used study comprised bioreactor pit. operated sequence inflow → anoxic phase aerobic improvement elucidated by comparing results (circulation type, CT)...

Apart from using as fertilizer for plants, the application of struvite may be expanded to animal feed industries through proper pre-treatment. This study aimed investigate safety and efficacy pre-treated (microwave irradiated (MS) incinerated (IS)) in feeds. For assessment, an vivo toxicity experiment thirty female Sprague Dawley rats (average body weight (BW) 200 ± 10 g) was conducted. The were randomly divided into five groups, including a control. Based on BW, MS IS applied daily by oral...

Due to rapid economic return, mixed crop-swine farming systems in Korea have become more intensive. Intensive practices often cause nutrient surpluses and lead environmental pollution. Nutrient budgets can be used evaluate the impact as a regulatory policy instrument for management. This study was conducted select budgeting approach applicable farms suggest an effective manure treatment method reduce on-farm production.In this study, we compared current ideal gross balance (GNB) approaches...

The objective of this study was to evaluate the feasibility reutilizing phosphorus (P) recovered as struvite from swine wastewater an alternative commercial P sources in broiler feed. pre-treated microwave irradiated (MS) and incinerated (IS) reduce NH4-N concentration before application. A preliminary on growth performance blood metabolites chickens then performed assess effect MS IS by comparing with monobasic dicalcium phosphate (MDCP, control). total 204 male Ross 308 (mean body weight...

The present study was conducted to investigate a supplemental effect of magnesium hydrogen phosphate (MHP, MgHPO4) as an alternative phosphorus (P) source on growth and feed utilization juvenile far eastern catfish (Silurus asotus) in comparison with three conventional P additives (monocalcium (MCP), dicalcium (DCP) tricalcium [TCP]) positive controls. A basal diet negative control prepared without supplementation four sources were added at the level 2%. Five groups 450 fish having mean body...

The aim of this study was to investigate the performance developed real-time controlled bio-liquor circulation system (BCS) on a farm-scale optimize bioreactor operation for manure treatment, and subsequently reduce both manure-related malodor greenhouse gas (GHG) emissions from slurry pits. BCS operated sequentially as per swine inflow (anoxic, aerobic, settling) pit. duration each operational phase self-adjusted in using novel algorithm detecting control point oxidation-reduction potential...