农业工程学报2024，Vol.40Issue(24)：208-217,10.DOI:10.11975/j.issn.1002-6819.202408204
笼养鸭粪水酸化贮藏条件对其保肥与重金属去除的影响
Effects of acidified storage conditions on nutrient retention and heavy metal removal in caged duck manure wastewater
摘要
Abstract
Caged duck industry has developed rapidly to solve the pollution of water environment that caused by the free-range breeding.However,the large volumes and high moisture content can be found in the feces of caged ducks,leading to mismatch the time required for fertilizer demanding of major crops,such as paddy rice.It is often required for the storage.The conventional long-term open-storage of high moisture content duck feces(HMCDF)can lead to the rapid nitrogen escape and a prominent residue of heavy metal(Cu2+and Zn2+).The low nitrogen content and high residual of heavy metals can cause the great loss in the value of HMCDF as a fertilizer.It is essential to promote the sustainable development of the caged duck industry.This study aims to continuously track the nitrogen,phosphorus,potassium,and carbon content,as well as the concentrations of Cu2+and Zn2+in the liquid phase of HMCDF under quasi-anaerobic storage conditions for a duration of 12 months.Effective microorganisms(EM)and photosynthetic bacteria(PSB)were inoculated sequentially,with pH monitored every two weeks.Sulfuric acid was gradually added to maintain the liquid phase pH at the required experimental levels.Phase separation occurred in the substances in HMCDF after 12 months of quasi-anaerobic storage,leading to the formation of floating layer,liquid phase,and solid sediment.There were the significant differences(P＜0.05)among the different acidity treatments.The total organic carbon(TOC)in the liquid phase of HMCDF was accumulated significantly(P＜0.05)in the acidic environment of pH 4.The TOC content reached 10 366.67 mg/L at the end of storage;The ammonium nitrogen(NH4+-N)content firstly increased and then stabilized,thus effectively preserving nitrogen.The NH4+-N content reached 2 785.07 mg/L;The total phosphorus(TP)content firstly decreased and then gradually recovered to 99.14％of the initial value.The TP content reached 249.50 mg/L at the end of storage.There was the significant retention effect of phosphorus in the liquid phase of HMCDF;The removal rates of Cu2+and Zn2+in the liquid phase were 82.02％and 90.15％,respectively.Furthermore,the Cu2+and Zn2+contents were 0.64 and 0.16 mg/mL,respectively,at the end of storage.It was significantly reduced the heavy metal pollution risk in the fertilizer utilization of HMCDF;While the K+content increased by 11.02％(reached 2 430.67 mg/L)at the end of storage,compared with the initial value.The fertilizer efficacy of HMCDF was significantly enhanced to serve as a basal fertilizer after quasi-anaerobic storage.Therefore,the pH of the liquid phase at 4 was used to sequentially inoculate the liquid with EM and PSB.The best preservation and the highest efficiency of heavy metal removal were achieved in the quasi-anaerobic storage of HMCDF.This effective technical approach can be expected to solve the HMCDF issues in large-scale caged duck farms.关键词
鸭粪水/重金属/酸化贮藏/酸度调控/EM/PSB/液相组分消长规律Key words
duck manure wastewater/heavy metal/acidified storage/acidity control/EM/PSB/law of composition fluctuation in liquid phase分类
资源环境引用本文复制引用
向秋豪,李锐,刘晓成,黄娜,何幼军,阮榕生,张琦,崔宪,刘玉环,王允圃,巫小丹,郑洪立,彭红,赖江玲..笼养鸭粪水酸化贮藏条件对其保肥与重金属去除的影响[J].农业工程学报,2024,40(24):208-217,10.基金项目
江西天韵农业开发股份有限公司《笼养鸭粪水无害化资源化利用》横向项目 （）
优质笼养蛋鸭无铅皮蛋提质增效技术转化应用与示范推广项目(S2024KJCGF0136) （S2024KJCGF0136）
重庆市自然科学基金项目(CSTB2022NS CQ-MSX1634 （）
CSTB2022NS CQ-MSX0546) （）
食品科学与资源挖掘全国重点实验室自由探索项目(SKLF-ZZB-202321) （SKLF-ZZB-202321）
