A

Alkaline Hydrolysis

Alkaline hydrolysis is a treatment process that uses water, an alkaline chemical solution, heat, and controlled operating conditions to break down animal tissue, pathological material, and other biological waste. BioSAFE tissue digesters use alkaline hydrolysis to convert tissue waste into treated liquid effluent and a limited quantity of remaining inorganic material.

Related terms: Tissue digester, tissue waste, pathological waste, prion.

Autoclave

An autoclave is equipment that uses saturated steam under pressure to decontaminate biological waste or sterilize equipment and supplies. The effectiveness of an autoclave cycle depends on factors such as temperature, pressure, exposure time, loading, and the ability of steam to reach the material being treated.

Related terms: Steam sterilization, biological indicator, decontamination.

B

Batch Effluent Decontamination System

A batch effluent decontamination system collects a defined volume of liquid waste in one or more treatment vessels before applying a validated thermal or chemical treatment cycle. Batch systems can accommodate variable waste streams and higher solids content while providing clearly separated treatment cycles.

Also known as: Batch EDS.

Related terms: Effluent decontamination system, continuous-flow EDS, batch processing.

Batch Processing

Batch processing treats a defined quantity of waste during a separate operating cycle. The system receives the waste, applies the required treatment conditions, verifies completion, and discharges the treated material before beginning another cycle.

In effluent treatment, batch processing may be appropriate when waste composition, volume, or solids content varies between loads.

Biological Indicator

A biological indicator is a monitoring device containing microorganisms, usually resistant bacterial spores, used to evaluate whether a sterilization or decontamination process achieved the required microbial inactivation.

Unlike mechanical or chemical indicators, biological indicators directly test the microbial killing capability of the process.

Also known as: BI or spore test.

Biological Waste

Biological waste is a broad term for discarded material generated through biological, medical, veterinary, agricultural, pharmaceutical, or laboratory activities. It may include cultures, tissues, contaminated materials, animal waste, liquid waste, or other materials requiring controlled handling and treatment.

The precise classification of biological waste depends on its contents, associated risks, and applicable regulations.

Biohazard

A biohazard is a biological agent, material, or condition that could pose a risk to people, animals, plants, or the environment. Biohazards may include infectious microorganisms, contaminated waste, biological toxins, blood, tissue, cultures, or recombinant biological materials.

Biohazardous Waste

Biohazardous waste is discarded material that contains, or may contain, biological agents capable of creating an exposure or contamination risk. Depending on the jurisdiction and application, it may include infectious waste, cultures, contaminated laboratory materials, pathological waste, sharps, or liquid biological waste.

The term is often used broadly and may not have the same regulatory meaning in every location.

Bioload

Bioload is the quantity and type of viable microorganisms present on or within a material before treatment. It may also be called bioburden or microbial load.

Understanding the expected bioload helps determine the treatment conditions and validation approach required for a waste stream.

Biosafety

Biosafety is the use of laboratory practices, safety equipment, facility controls, and risk-management procedures to reduce accidental exposure to biological agents and prevent their unintended release into the environment.

Biosafety Level

A biosafety level, or BSL, is a combination of laboratory practices, safety equipment, containment controls, and facility design appropriate for the biological agents and procedures used in a laboratory.

The four levels, BSL-1 through BSL-4, provide progressively greater containment. The appropriate level is determined through a protocol- and risk-based assessment.

BSL-1

Biosafety Level 1 is the basic level of laboratory containment. It is generally used for work involving well-characterized biological agents that are not known to consistently cause disease in healthy adults and present minimal potential risk to personnel and the environment.

BSL-2

Biosafety Level 2 builds on BSL-1 and is generally used for work involving biological agents that pose moderate hazards to personnel or the environment. It includes additional controls such as restricted access, personal protective equipment, biological safety cabinets for aerosol- or splash-generating procedures, and access to an appropriate decontamination method.

BSL-3

Biosafety Level 3 is used for work involving agents that may cause serious or potentially lethal disease, particularly through inhalation. BSL-3 laboratories use enhanced practices, controlled access, specialized containment equipment, and facility features designed to prevent the release of infectious aerosols.

BSL-4

Biosafety Level 4 is the highest level of biological containment. It is used for work involving dangerous or exotic agents that pose a high individual risk of life-threatening disease and may have no widely available treatment or vaccine.

BSL-4 work requires highly specialized facilities, procedures, equipment, and personal protection.

C

Chemical Decontamination

Chemical decontamination uses a chemical agent to reduce or eliminate biological contamination. In an effluent decontamination system, chemical treatment may involve adjusting conditions such as pH, concentration, contact time, and mixing to achieve the required treatment result.

BioSAFE configures EDS platforms for chemical or thermal processing based on the facility and waste stream.

Commissioning

Commissioning is the documented process of confirming that a newly installed, modified, or upgraded system has been installed correctly and operates according to its design intent.

For BioSAFE systems, commissioning may include verification of mechanical and electrical installation, control functions, operating conditions, and biological performance.

Continuous-Flow Effluent Decontamination System

A continuous-flow effluent decontamination system treats liquid waste as it moves through the system rather than collecting an entire load for a separate batch cycle.

Continuous systems are generally suited to facilities with steady waste generation and predictable loads. Their design can support energy recovery, reduced system footprint, and scalable throughput.

Also known as: Continuous EDS.

Continuous Processing

Continuous processing allows material to enter, move through, and exit a treatment system while the system remains in operation. Unlike batch treatment, the process does not require each complete load to finish before additional material can enter.

BioSAFE uses continuous processing in both its STI medical waste treatment system and selected effluent decontamination systems.

D

Decontamination

Decontamination is a process that removes, reduces, or inactivates pathogenic microorganisms so that an object, material, surface, or waste stream can be safely handled, used, transported, discharged, or discarded.

Decontamination does not always mean sterilization. The required outcome depends on the material, risk, and intended next step.

Disinfection

Disinfection is a physical or chemical process that eliminates many or all pathogenic microorganisms on inanimate materials, but it may not destroy all microbial forms, particularly resistant bacterial spores.

The required level of disinfection depends on the application and associated risk.

Duty Cycle

Duty cycle describes how frequently and for how long a system operates during a defined period. It may include the number of treatment cycles, hours of operation, periods of peak demand, and intervals between runs.

BioSAFE considers duty cycle when developing maintenance schedules and evaluating system condition.

E

Effluent

Effluent is liquid waste or treated liquid leaving a process, facility, or treatment system. In laboratories and life science facilities, effluent may contain biological, chemical, or other contaminants that require treatment before approved discharge.

Effluent Decontamination System

An effluent decontamination system, or EDS, is an engineered system that treats biologically active or potentially infectious liquid waste before discharge.

An EDS may use thermal or chemical treatment and may be configured for batch or continuous-flow operation. The appropriate configuration depends on waste composition, throughput, containment level, utilities, and facility requirements.

Related BioSAFE resource: Effluent Decontamination Systems.

Engineering Assessment

An engineering assessment evaluates a facility’s operating requirements, infrastructure, waste stream, compliance considerations, and project goals before a treatment solution is recommended.

BioSAFE uses the assessment process to develop facility-specific engineering recommendations rather than applying the same configuration to every project.

H

HEPA Filter

A high-efficiency particulate air filter, or HEPA filter, is designed to capture airborne particles with very high efficiency. By definition, a HEPA filter is at least 99.97% efficient at capturing particles measuring 0.3 micrometers.

HEPA filters are used in ventilation, containment, and equipment systems to help control airborne contaminants.

High-Containment Laboratory

A high-containment laboratory is a facility designed to safely conduct work involving biological agents that require enhanced containment practices, equipment, and engineering controls.

The term commonly includes BSL-3 and BSL-4 laboratories, although the exact controls required depend on the agents, activities, and facility-specific risk assessment.

I

Incineration

Incineration is a waste treatment method that uses high-temperature combustion to destroy waste and reduce its volume. Medical waste incinerators may require air-pollution controls and are subject to applicable environmental requirements.

BioSAFE specializes in alternative, non-incineration technologies for solid, liquid, and tissue waste treatment.

Infectious Waste

Infectious waste is waste known or reasonably expected to contain biological agents capable of causing disease. It may include cultures, contaminated materials, certain laboratory waste, pathological waste, or other materials defined by the applicable authority.

The term may overlap with medical waste, biohazardous waste, or regulated medical waste, but classifications vary by jurisdiction.

Integrated Shredder

An integrated shredder is a shredding unit incorporated directly into a waste treatment system. It reduces the size of solid waste, increases exposed surface area, opens bags and containers, and helps produce a more uniform material for treatment.

The BioSAFE STI system combines shredding with direct steam application as part of its continuous treatment process.

L

Liquid Biohazardous Waste

Liquid biohazardous waste is liquid generated by a laboratory, research facility, healthcare operation, or biological production process that contains or may contain biological contaminants.

Examples may include laboratory drainage, process wastewater, contaminated wash water, liquid cultures, or effluent from autoclaves and washers.

Log Reduction

Log reduction expresses the decrease in the number of viable microorganisms following a treatment process. Each additional log represents another tenfold reduction in the surviving microbial population.

The required reduction level depends on the organism, waste stream, treatment objective, applicable standards, and validation protocol.

Low-Pressure Steam Treatment

Low-pressure steam treatment uses steam at controlled pressure, temperature, and exposure conditions to decontaminate solid regulated waste.

The BioSAFE STI system applies low-pressure steam before and during shredding and continues treatment while the material moves through the steam auger.

M

Medical Waste

Medical waste is waste generated by healthcare facilities, laboratories, medical research operations, veterinary facilities, and related activities. It may include material contaminated by blood, body fluids, or other potentially infectious substances.

Not all waste generated by a healthcare facility is regulated medical waste. Classification depends on the waste’s contents and the applicable jurisdiction.

Medical Waste Treatment System

A medical waste treatment system is equipment designed to process regulated solid waste so it can be safely handled and prepared for its approved final disposal route.

Treatment may involve steam, shredding, heat, chemicals, incineration, or another approved technology. The appropriate method depends on the waste type, facility, jurisdiction, and required treatment outcome.

N

Negative Pressure

Negative pressure is an airflow condition in which air moves from an adjacent area into a controlled space because the controlled space is maintained at a lower pressure.

It is used to help prevent potentially contaminated air from escaping into surrounding areas. Air leaving the controlled space may be exhausted outside or passed through appropriate filtration.

Non-Incineration Treatment

Non-incineration treatment processes waste without relying on combustion. Examples include steam treatment, alkaline hydrolysis, thermal effluent treatment, and chemical decontamination.

BioSAFE’s primary technologies are positioned as alternatives to incineration for regulated solid waste, liquid effluent, and tissue waste.

O

On-Site Waste Treatment

On-site waste treatment means processing waste at the facility where it is generated rather than transporting it untreated to a third-party treatment location.

Potential benefits include greater control over treatment, reduced transportation, predictable operating costs, and fewer external handling steps. The operational and financial value depends on waste volume, system utilization, infrastructure, labor, and regulatory requirements.

P

Pathogen Inactivation

Pathogen inactivation is the reduction or elimination of a biological agent’s ability to remain viable, replicate, or cause infection.

A validated inactivation process must define the relevant organism or surrogate, treatment parameters, required reduction, monitoring method, and acceptance criteria.

Pathological Waste

Pathological waste includes discarded human or animal tissues, organs, body parts, specimens, and related biological materials.

Depending on its origin and contamination status, pathological waste may be classified as regulated waste and require a specific treatment or disposal method.

Programmable Logic Controller

A programmable logic controller, or PLC, is an industrial computer used to monitor equipment inputs, execute programmed control logic, and operate system components.

In a waste treatment system, the PLC may control valves, pumps, heaters, motors, alarms, cycle timing, safety interlocks, and process records.

Preventive Maintenance

Preventive maintenance is scheduled inspection, testing, servicing, and calibration intended to maintain system performance and identify developing issues before they cause unplanned downtime or compliance problems.

Maintenance requirements depend on system configuration, operating environment, duty cycle, and component condition.

Prion

A prion is an infectious, misfolded protein associated with progressive neurological diseases in humans and animals. Prions differ from bacteria and viruses and can be unusually resistant to conventional treatment methods.

Examples of prion diseases include bovine spongiform encephalopathy, chronic wasting disease, scrapie, and Creutzfeldt-Jakob disease.

R

Red Bag Waste

Red bag waste is a commonly used term in the United States for potentially infectious medical waste placed in a red, biohazard-marked bag for controlled handling.

The color of the bag does not independently determine whether material is regulated. Classification depends on the contents and applicable requirements. Different jurisdictions may use different color coding systems.

Regulated Medical Waste

Regulated medical waste, or RMW, is medical waste subject to specific requirements for segregation, packaging, storage, transportation, treatment, or disposal.

Depending on the applicable regulation, it may include liquid or semi-liquid blood, contaminated sharps, certain pathological or microbiological waste, and materials capable of releasing blood or other potentially infectious substances.

S

Sharps Waste

Sharps waste includes needles, scalpels, lancets, broken glass, and other objects capable of cutting or puncturing skin.

Contaminated sharps require immediate placement in an appropriate sharps container that is closable, puncture-resistant, leak-resistant, and properly labeled or color-coded.

Steam Auger

A steam auger is an enclosed conveying chamber that moves shredded waste through controlled steam-treatment conditions.

In the BioSAFE STI system, the auger conveys the waste while low-pressure steam is injected through multiple ports. The material remains under treatment conditions as it moves toward discharge.

Sterilization

Sterilization is a physical or chemical process that destroys or eliminates all forms of microbial life, including highly resistant bacterial spores. Sterilization is distinct from disinfection and should be verified through appropriate mechanical, chemical, and biological monitoring.

STI Medical Waste Treatment System

The BioSAFE STI Medical Waste Treatment System is an on-site, continuous-flow system for treating regulated solid waste.

The system integrates waste loading, shredding, low-pressure steam treatment, controlled retention time, and compaction to produce treated material for its approved disposal or recycling route.

Related BioSAFE resource: STI Medical Waste Treatment System.

System Capacity

System capacity is the quantity of waste a treatment system is designed to process during a defined period. It may be expressed in pounds per hour, gallons per day, liters per batch, or another measurement appropriate to the waste stream.

Capacity selection should consider average volume, peak demand, operating schedule, redundancy, future growth, and expected system availability.

System Modernization

System modernization is the process of updating an existing treatment system to improve reliability, maintainability, control, safety, capacity, or compliance without necessarily replacing the complete system.

Modernization may include new controls, instrumentation, electrical components, safety features, or mechanical upgrades.

T

Thermal Treatment

Thermal treatment uses controlled heat to reduce or eliminate biological contamination. Depending on the system and application, heat may be delivered through steam, heated vessels, heat exchangers, or another engineered process.

Treatment effectiveness depends on achieving and maintaining validated conditions throughout the waste stream.

Thermic Digestion

Thermic digestion uses controlled heat, mechanical agitation, and defined operating conditions to process tissue waste. The exact configuration depends on the tissue type, required treatment outcome, system pressure, capacity, and facility requirements.

BioSAFE offers tissue-digestion configurations that include mechanically agitated thermic and caustic processes.

Throughput

Throughput is the quantity of waste a system actually processes over a defined period. It is influenced by system capacity, waste characteristics, loading practices, treatment time, operating schedule, and downtime.

Throughput may differ from the system’s maximum rated capacity under real operating conditions.

Tissue Digester

A tissue digester is an engineered system that processes biological tissue through controlled thermal and chemical conditions.

BioSAFE tissue digesters use alkaline hydrolysis technology and can be configured according to containment requirements, throughput, available utilities, pressure, and discharge constraints.

Related BioSAFE resource: Tissue Digesters.

Tissue Waste

Tissue waste includes discarded human or animal tissue, organs, carcasses, pathological specimens, and biological materials generated through research, healthcare, veterinary, agricultural, or pharmaceutical activities.

Its treatment requirements depend on contamination, disease risk, chemical content, research application, and applicable regulations.

V

Validation

Validation is the documented process of demonstrating that a system or treatment process consistently performs as intended and meets defined acceptance criteria.

BioSAFE validation activities focus on confirming repeatable performance of critical parameters and producing documentation that explains how system performance was evaluated.

Validation may include:

• Installation checks
• Instrument calibration
• Control-function testing
• Process-parameter verification
• Biological efficacy testing
• Alarm and safety-interlock testing
• Review of treatment records
• Final validation documentation

W

Waste Stream

A waste stream is a category or flow of waste generated by a facility or process. It is characterized by factors such as physical form, composition, volume, solids content, contamination risk, generation pattern, and treatment requirements.

A facility may generate multiple waste streams, including regulated solid waste, liquid biological effluent, tissue waste, chemical waste, and ordinary municipal waste. Each may require a different handling or treatment approach.