Optimization of Solid-State Anaerobic Digestion of Prairie Biomass and Beef Manure

Author(s): Abigail Schulte, Elmin Rahic, Zhiyou Wen

Abstract:

This dataset supports the evaluation and optimization of solid-state anaerobic digestion (SSAD) using prairie biomass and beef manure mixtures under varying total solids (TS) contents, particle sizes, and percolation frequency. It includes raw and processed data on biogas and methane production, volatile solids composition, carbon-to-nitrogen ratios, theoretical biochemical methane potential (BMP), energy balances, and water activity.

Funder: USDA NIFA

Award Title:

Consortium for Cultivating Human And Naturally reGenerative Enterprises: Grass2Gas

Award Number: 2020-68012-31824

Keywords:

beef manure, biochemical methane potential, particle size, prairie biomass, solid-state anaerobic digestion, total solids content, water activity

Project (Abbreviated name):

G2G_Wen_SSAD_optimization

Team: Grass2Gas

Families:

Bovidae

Species:

Bos taurus

Full Metadata:

G2G_Wen_SSAD_optimization metadata_v1.0.pdf (341.69 KB)

Data Mirror:

Data Table Column Names and Descriptions

Table name	Column name	Data type	Units	Column description
data.SSAD_biogas_production_raw	NH3 sample 1	float	milligramPerLiter	The concentration of ammonia nitrogen in the reactor, expressed in milligrams per liter.
data.SSAD_biogas_production_raw	NH3 sample 2	float	milligramPerLiter	The concentration of ammonia nitrogen in the reactor, expressed in milligrams per liter.
data.SSAD_biogas_production_raw	SSAD biogas production raw pkey	integer	dimensionless	A unique primary key for this table.
data.SSAD_biogas_production_raw	biogas yield ml	float	milliliter	Daily biogas production at the indicated total solids and prairie biomass to manure ratio, expressed as mL. Biogas was measured every 3 to 5 days.
data.SSAD_biogas_production_raw	day	integer	number	Days elapsed since innoculation of the digestion experiment. The raw data was truncated to 35 days in the final dataset.
data.SSAD_biogas_production_raw	innoculation date	dateTime	YYYY-MM-DD	The date the reactor was initially loaded and innoculated.
data.SSAD_biogas_production_raw	methane pct	float	percent	The methane content of the biogas, expressed as a percentage.
data.SSAD_biogas_production_raw	pH	float	NA	The pH level of the reactor contents at inoculation.
data.SSAD_biogas_production_raw	prairie biomass beef manure ratio	string	NA	The ratio of prairie biomass to beef manure used in the feedstock mixture, expressed as PB:BM.
data.SSAD_biogas_production_raw	reactor	integer	number	The identifier for the reactor used in the experiment.
data.SSAD_biogas_production_raw	sample date	dateTime	YYYY-MM-DD	The date the biogas sample was measured. Biogas was measured every 3-5 days and the raw data was truncated to 35 days in the final dataset.
data.SSAD_biogas_production_raw	total solids pct	string	NA	The concentration of total solids in the reactor mixture, expressed as a percent.
data.dataset_SSAD_biogas_production	biogas ml average	float	milliliter	Mean daily biogas production at the indicated total solids and prairie biomass to manure ratio across three trials, expressed as mL. Biogas was measured every 3 to 5 days and the yield was divided over the number of days since the last measurement.
data.dataset_SSAD_biogas_production	biogas ml trial 1	float	milliliter	Daily biogas production at the indicated total solids and prairie biomass to manure ratio, expressed as mL. Biogas was measured every 3 to 5 days and the yield was divided over the number of days since the last measurement.
data.dataset_SSAD_biogas_production	biogas ml trial 2	float	milliliter	Daily biogas production at the indicated total solids and prairie biomass to manure ratio, expressed as mL. Biogas was measured every 3 to 5 days and the yield was divided over the number of days since the last measurement.
data.dataset_SSAD_biogas_production	biogas ml trial 3	float	milliliter	Daily biogas production at the indicated total solids and prairie biomass to manure ratio, expressed as mL. Biogas was measured every 3 to 5 days and the yield was divided over the number of days since the last measurement.
data.dataset_SSAD_biogas_production	cumulative biogas mean ml	float	milliliter	The cumulative biogas production up to that day, in mL.
data.dataset_SSAD_biogas_production	cumulative methane mean ml	float	milliliter	The cumulative methane production up to that day, expressed in mL.
data.dataset_SSAD_biogas_production	daily methane mean ml	float	milliliter	The calculated daily methane volume based on biogas volume and methane percentage, expressed in mL.
data.dataset_SSAD_biogas_production	daily methane pct	float	percent	The mean daily percent methane in the biogas, expressed as a percentage.
data.dataset_SSAD_biogas_production	dataset SSAD biogas production pkey	integer	dimensionless	A unique primary key for this table.
data.dataset_SSAD_biogas_production	day	integer	number	Days elapsed since innoculation of the digestion experiment (1 through 35).
data.dataset_SSAD_biogas_production	methane pct average	float	percent	The mean methane content of the biogas across three trials, expressed as a percentage.
data.dataset_SSAD_biogas_production	methane pct trial 1	float	percent	The methane content of the biogas, expressed as a percentage.
data.dataset_SSAD_biogas_production	methane pct trial 2	float	percent	The methane content of the biogas, expressed as a percentage.
data.dataset_SSAD_biogas_production	methane pct trial 3	float	percent	The methane content of the biogas, expressed as a percentage.
data.dataset_SSAD_biogas_production	prairie biomass beef manure ratio	string	NA	The ratio of prairie biomass to beef manure used in the feedstock mixture, expressed as PB:BM.
data.dataset_SSAD_biogas_production	total solids pct	float	percent	The concentration of total solids in the reactor mixture, expressed as a percent.
data.dataset_SSAD_methane_by_TS_and_prairie_manure_ratio	cumulative methane mean ml per g vs	float	NA	The mean cumulative methane production over 35 days, expressed in mL per gram volatile solids fed.
data.dataset_SSAD_methane_by_TS_and_prairie_manure_ratio	daily methane mean ml per g vs	float	NA	The summarized daily methane volume based on biogas volume and methane percentage, expressed in mL.
data.dataset_SSAD_methane_by_TS_and_prairie_manure_ratio	dataset SSAD methane by TS and prairie manure ratio pkey	integer	dimensionless	A unique primary key for this table.
data.dataset_SSAD_methane_by_TS_and_prairie_manure_ratio	mean water activity aw	float	dimensionless	The average water activity (aw) of the mixture, indicating moisture availability for microbial activity.
data.dataset_SSAD_methane_by_TS_and_prairie_manure_ratio	prairie biomass beef manure ratio	string	NA	The ratio of prairie biomass to beef manure used in the feedstock mixture, expressed as PB:BM.
data.dataset_SSAD_methane_by_TS_and_prairie_manure_ratio	total solids pct	float	percent	The concentration of total solids in the reactor mixture, expressed as a percent.
data.dataset_chemical_compositions	anaerobic sludge	float	NA	The measured value of the parameter for anaerobic sludge, with units as indicated in the 'parameter' column.
data.dataset_chemical_compositions	beef manure	float	NA	The measured value of the parameter for beef manure, with units as indicated in the 'parameter' column.
data.dataset_chemical_compositions	dataset chemical compositions pkey	integer	dimensionless	A unique primary key for this table.
data.dataset_chemical_compositions	parameter	string	NA	The name of the chemical or physical property being measured.
data.dataset_chemical_compositions	prairie biomass	float	NA	The measured value of the parameter for prairie biomass, with units as indicated in the 'parameter' column.
data.dataset_energy_balance_by_particle_size	dataset energy balance by particle size pkey	float	dimensionless	A unique primary key for this table.
data.dataset_energy_balance_by_particle_size	energy output or input	string	NA	The type of energy metric being measured (e.g., methane yield, energy produced, energy consumed).
data.dataset_energy_balance_by_particle_size	one inch	string	NA	The value of the energy metric for biomass milled to 1-inch particle size.
data.dataset_energy_balance_by_particle_size	one quarter inch	string	NA	The value of the energy metric for biomass milled to one-quarter inch particle size.
data.dataset_energy_balance_by_particle_size	two mm	string	NA	The value of the energy metric for biomass milled to 2 mm particle size.
data.dataset_loading_conditions	beef manure g	float	gram	The mass of beef manure loaded into the reactor, in grams.
data.dataset_loading_conditions	dataset loading conditions pkey	integer	dimensionless	A unique primary key for this table.
data.dataset_loading_conditions	initial NH3	float	milligramPerLiter	Initial ammonia concentration in the reactor, expressed in milligrams per liter.
data.dataset_loading_conditions	prairie biomass beef manure ratio	string	NA	The ratio of prairie biomass to beef manure used in the feedstock mixture, expressed as PB:BM.
data.dataset_loading_conditions	prairie grass g	float	gram	Mass of prairie grass loaded into the reactor, in grams.
data.dataset_loading_conditions	sludge g	float	gram	The mass of anaerobic sludge used as inoculum, in grams.
data.dataset_loading_conditions	total solids ppn	float	percent	The concentration of total solids in the reactor mixture, expressed as a percent.
data.dataset_mixture_carbon_nitrogen_ratio_bmp	biochemical methane potential ml per gVS	float	NA	The methane yield potential of the mixture, expressed in milliliters of methane per gram of volatile solids (gVS) fed to the digester.
data.dataset_mixture_carbon_nitrogen_ratio_bmp	dataset mixture carbon nitrogen ratio bmp pkey	integer	dimensionless	A unique primary key for this table.
data.dataset_mixture_carbon_nitrogen_ratio_bmp	mixture carbon nitrogen ratio	float	gramPerGram	The calculated carbon-to-nitrogen ratio of the mixture.
data.dataset_mixture_carbon_nitrogen_ratio_bmp	prairie biomass beef manure ratio	string	NA	The ratio of prairie biomass to beef manure used in the feedstock mixture, expressed as PB:BM.
data.dataset_particle_size	biogas ml	float	milliliter	Daily biogas production at the indicated total solids and prairie biomass to manure ratio, expressed as mL. Biogas was measured every 3 to 5 days.
data.dataset_particle_size	cumulative methane ml	float	milliliter	The total methane produced up to and including that day, expressed in mL.
data.dataset_particle_size	daily methane ml	float	milliliter	The volume of methane in this batch of bigas, calculated from biogas volume and methane composition percent. Expressed in mL.
data.dataset_particle_size	dataset particle size pkey	integer	dimensionless	A unique primary key for this table.
data.dataset_particle_size	day	integer	number	Days elapsed since innoculation of the digestion experiment. The raw data was truncated to 35 days in the final dataset.
data.dataset_particle_size	methane pct	float	percent	The methane content of the biogas, expressed as a percentage.
data.dataset_particle_size	particle size	string	NA	The size of prairie biomass particles used in the reactor. Sizes were achived by hammer mill screening.
data.dataset_particle_size	reactor	integer	number	The identifier for the reactor used in the experiment.
data.dataset_particle_size	sample date	dateTime	YYYY-MM-DD	The date the biogas sample was measured. Biogas was measured every 3-5 days.
data.dataset_theoretical_BMP_parameters	biochemical methane potential ml per gVS	float	NA	The estimated methane yield per gram of volatile solids, based on the elemental composition and Boyle's modified Buswell equation.
data.dataset_theoretical_BMP_parameters	carbon	float	percent	The mass percentage of this element in the volatile solids (VS) of each substrate.
data.dataset_theoretical_BMP_parameters	dataset theoretical BMP parameters pkey	float	dimensionless	A unique primary key for this table.
data.dataset_theoretical_BMP_parameters	hydrogen	float	percent	The mass percentage of this element in the volatile solids (VS) of each substrate.
data.dataset_theoretical_BMP_parameters	nitrogen	float	percent	The mass percentage of this element in the volatile solids (VS) of each substrate.
data.dataset_theoretical_BMP_parameters	oxygen	float	percent	The mass percentage of this element in the volatile solids (VS) of each substrate.
data.dataset_theoretical_BMP_parameters	parameter a	float	mole	Parameter in Boyleâ€™s modified Buswell equation. The number of moles of methane (CHâ‚„) produced per mole of substrate, based on the carbon, hydrogen, oxygen, nitrogen, and sulfur content.
data.dataset_theoretical_BMP_parameters	parameter b	float	mole	Parameter in Boyleâ€™s modified Buswell equation. The number of moles of carbon dioxide (COâ‚‚) produced per mole of substrate.
data.dataset_theoretical_BMP_parameters	parameter c	float	mole	Parameter in Boyleâ€™s modified Buswell equation. The number of moles of ammonia (NHâ‚ƒ) produced, derived from the nitrogen content.
data.dataset_theoretical_BMP_parameters	parameter d	float	mole	Parameter in Boyleâ€™s modified Buswell equation. The number of moles of hydrogen sulfide (Hâ‚‚S) produced, derived from the sulfur content.
data.dataset_theoretical_BMP_parameters	parameter e	float	NA	Parameter in Boyleâ€™s modified Buswell equation. A conversion factor used to translate the stoichiometric gas volumes into biochemical methane potential in milliliters per gram of volatile solids (mL/gVS), accounting for molecular weights and standard gas conditions.
data.dataset_theoretical_BMP_parameters	sulfur	float	percent	The mass percentage of this element in the volatile solids (VS) of each substrate.
data.dataset_water_activity	Beef Manure	float	dimensionless	Water activity value for this substrate.
data.dataset_water_activity	Corn Stover	float	dimensionless	Water activity value for this substrate.
data.dataset_water_activity	Inoculum Sludge	float	dimensionless	Water activity value for this substrate.
data.dataset_water_activity	Miscanthus	float	dimensionless	Water activity value for this substrate.
data.dataset_water_activity	Prairie Biomass	float	dimensionless	Water activity value for this substrate.
data.dataset_water_activity	Switchgrass	float	dimensionless	Water activity value for this substrate.
data.dataset_water_activity	dataset water activity pkey	float	dimensionless	A unique primary key for this table.
data.dataset_water_activity	water activity measured	string	NA	The timining of measurement of water activity, either before or after digestion.
data.liquid_reuse_biogas_production_raw	NH3	float	milligramPerLiter	The concentration of ammonia nitrogen in the reactor, expressed in milligrams per liter.
data.liquid_reuse_biogas_production_raw	biogas yield ml	float	milliliter	Daily biogas production at the indicated particle size, total solids, and prairie biomass to manure ratio, expressed as mL. Biogas was measured every 3 to 5 days.
data.liquid_reuse_biogas_production_raw	cumulative methane ml	float	milliliter	The cumulative methane production up to that day, expressed in mL.
data.liquid_reuse_biogas_production_raw	daily methane ml	float	milliliter	The calculated daily methane volume based on biogas volume and methane percentage, expressed in mL.
data.liquid_reuse_biogas_production_raw	day	integer	number	Days elapsed since innoculation of the digestion experiment (1 through 35).
data.liquid_reuse_biogas_production_raw	liquid reuse biogas production raw pkey	integer	dimensionless	A unique primary key for this table.
data.liquid_reuse_biogas_production_raw	methane pct	float	percent	The methane content of the biogas, expressed as a percentage.
data.liquid_reuse_biogas_production_raw	net water loss g	float	gram	The net amount of water lost from the reactor, expressed in grams. Lost water was converted into water vapor, absorbed into the prairie mixture, or lost due to operational error.
data.liquid_reuse_biogas_production_raw	pH	float	NA	The pH level of the reactor contents at this timestep.
data.liquid_reuse_biogas_production_raw	particle size	string	NA	The size of the prairie biomass particles used in the feedstock.
data.liquid_reuse_biogas_production_raw	prairie grass to manure ratio	string	NA	The ratio of prairie biomass to beef manure used in the feedstock mixture, expressed as PB:BM.
data.liquid_reuse_biogas_production_raw	reactor	string	NA	The identifier for the reactor used in the experiment.
data.liquid_reuse_biogas_production_raw	remaining free liquid g	float	gram	The amount of free liquid remaining in the reactor at the conclusion of the experiment.
data.liquid_reuse_biogas_production_raw	sample date	dateTime	YYYY-MM-DD	The date the sample was taken.
data.liquid_reuse_biogas_production_raw	starting water g	float	gram	The initial amount of water in the reactor, expressed in grams.
data.liquid_reuse_biogas_production_raw	total solids pct	float	percent	The concentration of total solids in the reactor mixture, expressed as a percent.
data.liquid_reuse_biogas_production_raw	trial	string	NA	The trial number for that combination of particle size, total solids, and prairie biomass to manure ratio.
data.liquid_reuse_biogas_production_raw	water replaced ppn	float	NA	The proportion of water replaced over 35 days of operation, expressed as a decimal fraction of the starting amount.
data.recirculation_biogas_production_raw	biogas yield ml	float	milliliter	Daily biogas production for the indicated reactor and percolation schedule, expressed as mL. Biogas was measured every 3 to 5 days.
data.recirculation_biogas_production_raw	cumulative methane ml	float	milliliter	The cumulative methane production up to that day, expressed in mL.
data.recirculation_biogas_production_raw	daily methane ml	float	milliliter	The calculated daily methane volume based on biogas volume and methane percentage, expressed in mL.
data.recirculation_biogas_production_raw	day	integer	number	Days elapsed since innoculation of the digestion experiment (1 through 80).
data.recirculation_biogas_production_raw	methane pct	float	percent	The methane content of the biogas, expressed as a percentage.
data.recirculation_biogas_production_raw	percolation	string	NA	The liquid recirculation schedule applied to the reactor, including the time elapsed between and during pumping sessions.
data.recirculation_biogas_production_raw	reactor	string	NA	The identifier for the reactor used in the experiment.
data.recirculation_biogas_production_raw	recirculation biogas production raw pkey	integer	dimensionless	A unique primary key for this table.
data.recirculation_biogas_production_raw	sample date	dateTime	YYYY-MM-DD	The calendar date on which the biogas yield was measured.
data.total_volatile_solids_raw	material	string	NA	The type of organic material tested.
data.total_volatile_solids_raw	pH	float	NA	The pH of the sample.
data.total_volatile_solids_raw	total solids ppn	float	NA	The proportion of total solids in the sample, expressed as a decimal.
data.total_volatile_solids_raw	total volatile solids raw pkey	integer	dimensionless	A unique primary key for this table.
data.total_volatile_solids_raw	trial	float	number	The sample replicate.
data.total_volatile_solids_raw	volatile solids ppn	float	NA	The concentration of volatile (organic) solids in the sample, expressed as a proportion.