Treatment on Pig Slurries Study of Integrated Planting and Raising System in China Zhe Zhou and Guangyu Hu

Catalog Background and Problem Statement 1 2 Introduction of Solutions 3 Evaluation of Solutions 4 Discussion 5 Application of Solutions

Background and Problem Statement 2018/11/29 Background and Problem Statement Pig slurries bring about dirty air pollute the drinking water soil environment is damaged by eutrophication. http://www.ntv.cn/special/150729/

Background and Problem Statement 2018/11/29 Background and Problem Statement Recycling livestock slurries as biomass Methane can be produced to generate electricity CO2 emission decreases Organic fertilizer can be produced http://www.build-a-biogas-plant.com/methane-and-biogas/

Introduction of Solutions 1, Composting-sale, 2, Direct application, 3, Composting & Digestion-application

Evaluation of Solutions 2018/11/29 Evaluation of Solutions Three Environmental Impact Types Global Warming Potential (CO2, CH4 and NOx) Environmental acidification Potential (SO2 and NOx) Eutrophication potential (N and P elements) https://www.emaze.com/@AIRCCLCO/GreenHouse-Gases-Isasteuer https://webcam.srs.fs.fed.us/pollutants/acidification/ http://sachinkbiology11.weebly.com/

Evaluation of Solutions 2018/11/29 Evaluation of Solutions Mode 1 Pollutant type Collection Composting Transportation Sewage processing Total CO 0.00257 0.068 0.241 3.32 3.63 NOx 0.00639 0.406 0.602 34.5 35.5 CH4 0.000213 46.5 0.0201 201 248 SO2 0.00456 0.436 0.429 21.2 22.3 CO2 0.0252 325 237 2289 2851 NH3 — 14.9 Table. 1 Inventory for pollutant emission of mode 1 (kg/FU) FU-Functional unit (90 tons pig slurries were processed per day)

Evaluation of Solutions 2018/11/29 Evaluation of Solutions Mode 2 Pollutant type Collection Storage Transportation Field application Total CO 0.0997 — 0.0981 0.198 NOx 0.422 0.114 0.419 13.6 14.6 CH4 0.163 46.4 0.164 8.01 54.7 SO2 0.627 0.626 2.16 3.41 CO2 67.1 278 67.4 43.8 457 NH3 14.9 17.3 32.2 NO3-N 39.1 PO43- 8.42 Table. 2 Inventory for pollutant emission of mode 2 (kg/FU) FU-Functional unit (90 tons pig slurries were processed per day)

Biogas based electricity generation 2018/11/29 Evaluation of Solutions Mode 3 Pollutant type Collection Composting Biogas based electricity generation Field application Total Transportation Disinfection Spray irrigation CO 0.00204 0.0581 -1.24 0.0981 0.0794 0.171 NOx 7.47 9.43 -5.31 0.419 0.342 0.812 13.2 CH4 10.9 19.9 -2.08 0.164 0.133 0.307 29.3 SO2 0.00362 0.372 -7.71 0.626 0.509 1.10 CO2 99.2 218 -830 67.4 54.8 119 NH3 10.7 13.8 — 0.0103 0.140 24.6 NO3-N 14.3 PO43- 3.26 Table. 3 Inventory for pollutant emission of mode 3 (kg/FU) FU-Functional unit (90 tons pig slurries were processed per day)

Discussion Mode 3 is the best choice 2018/11/29 1, Chemical fertilizers are replaced by organic one, pollutants due to production of them vanish 2, Fermentation produced energy (biogas and electricity) for farms 3, Processed biogas liquid has less pollutant content http://www.build-a-biogas-plant.com/methane-and-biogas/

Application of Solutions Income of normal orchard   Quantity Total price/¥ Remarks Investment Sewerage pump and high-pressure sprayer 1 600 ¥1800 for first investment. ¥600 per year Chemical fertilizer 5893 Pesticide 3921 Electricity 150kwh 300 Irrigation Gasoline 400 Sprayer Manpower 150 15000 Apr-Aug. 8h, ¥100/manpower Income Hybrid citrus 5462kg 32772 ¥6/kg Net Income 6658

Application of Solutions Income of demonstration orchard   Quantity Total price/¥ Remarks Investment Sewerage pump and high-pressure sprayer 1 600 ¥1800 for first investment. ¥600 per year Chemical fertilizer 2750 Pesticide 856 Electricity 410kwh 820 Irrigation Gasoline 160 Sprayer Manpower 253 25300 Apr-Aug. 8h, ¥100/manpower Income Hybrid citrus 7500kg 52500 ¥6/kg Net Income 22014

Application of Solutions Economic benefits Chemical fertilizer investment 53.3% Pesticide investment 78.2% Gasoline cost 60% Manpower cost 68.7% Electricity cost 173.3% Fruit production 37.3% Income 16.7%

Application of Solutions Ecological benefits 1, Organic content of soil increases the volume-weight of soil decreases, top soil becomes thicker and tilth is improved 2, Dosage of pesticide decreases The amount of production increases and the quality of the fruit is improved Ecological condition is improved

Sources 1, Pig farm figure. http://www.ntv.cn/special/150729/ 2, Biogas digester and cartoon farm. http://www.build-a-biogas-plant.com/methane-and-biogas/ 3, Global warming figure. https://www.emaze.com/@AIRCCLCO/GreenHouse-Gases-Isasteuer 4, Acidification figure. https://webcam.srs.fs.fed.us/pollutants/acidification/ 5, Eutrophication figure. http://sachinkbiology11.weebly.com/

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