Addition of oyster shell to enhance organic matter degradation and nitrogen conservation during anaerobic digestate composting

Environmental Science and Pollution Research International
Ming-Yi LuRong-Bo Guo

Abstract

Anaerobic digested residue (DR) is the main by-product from biogas plants, and it is predominantly used as organic fertilizer after composting. To resolve the problems of long duration and nitrogen loss in conventional composting, bulking agents are always added during the composting process. In this study, oyster shell (OS) was used as a bulking agent for DR composting. Four treatments were conducted by mixing DR and OS at different concentrations (0%, 10%, 20% and 30%, based on wet weight) and then composting the mixtures for 40 days. The results showed that the organic matter (OM) degradation efficiency was enhanced by 5.62%, 12.15% and 16.98% with increasing amounts of OS addition. The increased content of microbial biomass carbon in the compost indicated a suitable living environment for aerobic microbes with added OS, which could explain the increased OM degradation efficiency. Compared with the control, the NH3 emissions in the treatments with 10%, 20% and 30% OS were decreased by 13.81%, 33.33% and 53.76%, respectively. The increase in total nitrogen content in the compost is probably due to the absorption of NH3 by OS. Results indicated that OS is a suitable bulking agent for DR composting and that the addition of 20-3...Continue Reading

References

May 1, 1996·Applied and Environmental Microbiology·T BeffaM Aragno
Nov 17, 2005·Waste Management·Dimitris P Komilis, Robert K Ham
Apr 20, 2006·Applied Biochemistry and Biotechnology·A E GhalyA Snow
Aug 12, 2010·Bioscience, Biotechnology, and Biochemistry·Young Han LeeHan Dae Yun
Dec 23, 2011·Journal of Hazardous Materials·Chun-Jiang AnKai An
Aug 7, 2012·Bioresource Technology·Ronghua LiRan Xiao
Dec 26, 2012·Journal of Environmental Management·Mingcan CuiJeehyeong Khim
Jun 24, 2015·Journal of Environmental Management·Ruirui ChenXiangui Lin
Aug 12, 2018·New Biotechnology·Jan Christoph PeinemannDaniel Pleissner
Dec 6, 2018·Journal of Environmental Management·Balasubramani RavindranJaeJoung Lee
Jan 30, 2019·Waste Management·Mateusz MalinowskiMagdalena Daria Vaverková
Mar 22, 2019·Environmental Science and Pollution Research International·Zilin SongChao Zhang
May 12, 2019·Environmental Science and Pollution Research International·Liqing XinWenxuan Xu
Nov 9, 2019·Environmental Science and Pollution Research International·Fariba AbbasiMahrokh Jalili
Jan 4, 2020·Environmental Science and Pollution Research International·Poomadathil Mohammed ShafeeqTapas Kumar Das

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biofuels (ASM)

Biofuels are produced through contemporary processes from biomass rather than geological processes involved in fossil fuel formation. Examples include biodiesel, green diesel, biogas, etc. Discover the latest research on biofuels in this feed.

Related Papers

Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA
Cecilia Sundberg, Rodrigo Navia
Journal of Environmental Management
Lucas Lourenço Castiglioni GuidoniÉrico Kunde Corrêa
© 2022 Meta ULC. All rights reserved