Solid‒liquid separation and its environmental impact on manure treatment in scaled pig farms - Based on life cycle assessment

Author:

Zhang Yijia1,Bo Qinqing2,Du Yating1,Du Xinyi1,Xu Liyang1,Yang Yadong1

Affiliation:

1. Chinese Academy of Agricultural Sciences

2. Fujian Coll Water Conservancy & Elect Power

Abstract

Abstract Recently, there has been a significant focus on the issue of pollution caused by livestock and poultry rearing, which is recognized as a prominent contributor to nonpoint source pollution in the agricultural sector. This study employed the life cycle assessment (LCA) methodology to evaluate the environmental impact of several pig manure processing scenarios, with the aim of determining the appropriate solid‒liquid separation tool for large-scale pig farms. The findings indicate that the utilization of a screw extruder for solid‒liquid separation in scenario 2 has a lower environmental impact. In contrast to scenario 1, scenario 2 exhibits reduced environmental potential in the areas of global warming, human toxicity, acidification, and eutrophication. Specifically, the global warming, human toxicity, acidification, and eutrophication impacts decreased by 56%, 81%, 83%, and 273%, respectively, due to the implementation of solid‒liquid separation. The type of solid‒liquid separation equipment used during the processing of swine manure, as well as the subsequent treatment, have a significant impact on environmental emissions. Compared to scenario 2, scenario 3, which utilizes a centrifugal microfilter for solid‒liquid separation, exhibits a lower environmental impact in terms of human toxicity, resulting in a reduction of 0.736 kg DCB-eq. In general, solid‒liquid separation is a viable environmentally friendly method for the disposal of waste from large-scale pig farms. The adoption of this method is highly recommended. During its implementation, careful consideration should be given to factors such as separation efficiency and pollution emissions. It is crucial to select appropriate equipment for solid‒liquid separation to effectively process the waste.

Publisher

Research Square Platform LLC

Reference66 articles.

1. Decision-making Behaviors And Influence Factors Of Pig Farmers At Different Scales Against African Swine Fever;Zhou X;Trans. Chin. Soc. Agric. Eng.,2020

2. Discharge of Swine Wastes Risks Water Quality and Food Safety: Antibiotics and Antibiotic Resistance Genes From Swine Sources to the Receiving Environments;He L;Environ. Int.,2016

3. Solid—Liquid Separation of Animal Slurry in Theory and Practice;Hjorth M;A Review. Agron. Sustain. Dev.,2010

4. Analysis Of Livestock And Poultry Manure Pollution In China And Its Treatment And Resource Utilization;Wu H;J. Agro-Environ. Sci.,2020

5. Analysis of Research Status and Development on Engineering Technology of Swine Farming Facilities;Wang D;Trans. Chin. Soc. Agric. Mach.,2018

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3