The disposal of “Green” and food processing waste has become both an economic and environmental
problem. Conventional organic waste disposal techniques can no longer satisfy increasing federal
and state regulations, spurring the development of new waste management methods. Livestock
feedlots, agricultural growers, food processors and municipalities must find new, environmentally
sound and economic ways to dispose of animal, green and food processing wastes.
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2) AHS Value
3) Air Quality
Newly developed anaerobic digestion processes not only dispose of these waste streams efficiently, they create biogas,
biofuels and other valuable byproducts. Anaerobic digestion is not new; it has existed about as long as life has been
present on earth. Anaerobic digestion, a naturally occurring process, is the bacterial breakdown of organic materials in the
absence of oxygen. Anaerobic digestion has been intensely developed over the past 20 years and is currently a
worldwide-accepted technological process
Organic Waste-to-Energy Solutions
Providing an efficient and economical solution to organic waste recovery, Onsite Power Systems, Inc. (OPS), offers
advanced Anaerobic High Solids (AHS) digester technologies and processes. The AHS digester incorporates high-solids
bioconversion technology called the “Anaerobic Phased Solids” (APS) developed in the laboratory of Dr. Ruihong Zhang
in the Biological and Agricultural Engineering Department at the University of California, Davis (UC Davis) and further
process technology innovations by OPS.
The OPS – AHS Value Proposition
The value proposition is the conversion of organic wastes into value added products, and renewable biofuels. The AHS
process is extremely effective in converting organic wastes into value added byproducts and renewable biomethane
(biogas). The biogas produced provides clean – renewable biofuels, usable for generating electrical and thermal energy.
Through a relatively simple conversion process, the biogas can be used as clean transportation biofuels in effectively
large enough volumes to penetrate substantially into the existing petroleum and petrochemical markets.
AHS Anaerobic Digestion “Value-Added” Products
Biogas is probably the most commonly recognized byproduct of the digestion process, but several other value-added
products result from AHS systems. These include liquid fertilizer, reclaimed water and high-value soil amendments,
besides intangible environmental benefits.
In the AHS process, virtually all pathogens are destroyed by the temperature and chemical environment. The AHS
process can also aid in the destruction and control of chemical pesticides, herbicides and animal hormones that are
present in various agricultural wastes. The final solid and liquid effluent contains very small volumes of minerals, and
discharges from the tanks are neither chemically nor biologically hazardous.
Portions of the nutrients that exist in the organic waste materials are concentrated in the residue solids and liquid of the
digester during its process. These nutrients convert to organically bound nitrogen that is then slowly released to form
ammonia and nitrates, both of which have commercial value for use in landscaping and agricultural operations.
Air Quality Benefits of Advanced Anaerobic Digestion
Biogas produced in the AHS digester is be treated to remove moisture and sulfur compounds such as H2S. The
generation of carbon dioxide in the AHS digester does not increase this greenhouse gas in the atmosphere, as does the
generation of carbon dioxide in the conversion processes of petroleum products. This is because in the AHS digester
process, most of the carbon from the digested vegetation is recycled back to the growing vegetation without increasing
atmospheric carbon dioxide. The sustainable, renewable methane from the anaerobic process, when properly oxidized in
an internal combustion engine or heating register, is essentially a non-polluting fuel.
This environmental benefit of the AHS digester is the reduction of methane released into the atmosphere. When
vegetation and animal manure decompose naturally, methane is always emitted. Live vegetation does not absorb and
convert free methane into cellulosic material as it does with free carbon dioxide. Therefore, naturally degrading organic
waste increases the methane released to the atmosphere. However, the organic material converted in the AHS digester
sequesters the generated methane until it is converted to carbon dioxide in the combustion process of an internal
combustion engine or heating register, then absorbed back into living vegetation.
Project Development Services
OPS provides “Turn-Key” project development where we are able maximize the strengths and experience of the OPS
management, partner and advisory team. OPS will generate revenues based on a percentage of the project and OPS
provides the digester project development services pertaining to:
Develop project business model and proforma
Identify potential Grants, Production Incentives, etc.
Evaluate project for Tax Credits, Tax Incentives, Structure, etc.
Permitting and regulatory issues and requirements
Feedstock identification and evaluation
Develop feedstock pre-processing requirements and specifications
Material receiving systems requirements based on contracted feedstock
AHS digester design parameters based on project specifics
o Digester tank specifications
o Piping and Instrumentation Diagram(s)
o Process Flow diagrams
o Mixing systems and circulation systems equipment identification
o Biogas collection and pre-treatment systems
o Identify ancillary equipment requirements
o Residue recovery and post-treatment system
Computer controls and instrumentation components identification
Computer control program and operational protocol
AHS digester systems design support during construction phase
System testing support for operational processes to meet design specifications
Biological, operational and digester management support during commissioning and operation
As part of these services, OPS works directly with the Design-Build construction company with the implementation of the
OPS offers the client an outsourced service agreement to construct, own and operate a digester facility at the Client’s
location. Service contracts structure are based on the customer’s current waste and wastewater disposal costs and the
facility’s utility costs. In this manner, the customer can reduce its operating costs, and hedge against increasing electrical
and natural gas costs.
Customer Benefits of an Outsourcing Service Contract:
Reduces utility bills and provides a hedge against rising utility costs
Solves waste hauling and disposal costs and restrictions
Solves air quality and environmental emissions problems from existing treatment processes
No capital investment required for new equipment as waste-management regulations and restrictions become stricter
“Off Balance Sheet” Financing
In certain applications, allows for the facility to expand operations
Eliminates up-front capital investment: service contracts turn capital costs into operating costs
Customer profits increase, asset base is reduced and asset-to-earnings ratio is improved
Highly visible and positive public relations impact on the company and community