Liquid waste management


Liquid waste management

Procedures and practices to prevent discharge of pollutants to the storm drain system or to watercourses as a result of the creation, collection, and disposal of non-hazardous liquid materials.

Appropriate Applications

This BMP is applicable to construction projects that generate any of the following non-hazardous byproducts, residuals, or wastes:

  1. Drilling slurries and drilling fluids
  2. Grease-free and oil-free wastewater and rinse water
  3. Dredged materials
  4. Other non-storm water liquid discharges not permitted by separate permits


  • Disposal of some liquids may be subject to specific laws and regulations, or to requirements of other permits secured for the construction project (e.g., National Pollutant Discharge Elimination System [NPDES] permits, Army Corps of Engineers permits, etc.).
  • This BMP does not apply to dewatering operations (see NS-2 [Dewatering Operations]), solid waste management (WM-6 [Solid Waste Management]), hazardous wastes (see WM-7 [Hazardous Waste Management]), or concrete slurry residue (see WM-9 [Concrete Waste Management]).
  • This BMP does not apply to non-storm water discharges permitted by any NPDES permit held by ITD. Typical permitted non-storm water discharges can include: water line flushing, landscape irrigation, diverted stream flows, rising groundwater, pumped groundwater, discharges from potable water sources, foundation drains, irrigation water, springs, water from crawl space pumps, footing drains, lawn watering, flows from riparian habitats and wetlands, and discharges or flows from emergency firefighting activities.

General Practices

The Contractor’s Water Pollution Control Manager shall oversee and enforce proper liquid waste management procedures and practices including the following:

  • Follow all applicable federal, state, and local regulations.
  • Instruct employees and subcontractors how to safely differentiate between non-hazardous liquids and potential or known hazardous liquids.
  • Instruct employees, subcontractors, and suppliers that it is unacceptable for any sedimentladen liquid to enter any storm drainage device, waterway, or receiving water without treatment to meet Idaho water quality standards.
  • Educate employees and subcontractors on the proper handling procedures for all liquids generated during construction activities by holding regular meetings (or incorporate into regular safety meetings) to discuss and reinforce disposal procedures.
  • Verify which non-storm water discharges are permitted by the CGP. Some listed discharges may require pre-treatment or treatment prior to leaving the site.
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Containing Liquid Wastes

  • Drilling residue and drilling fluids shall not be allowed to enter storm drains and watercourses and shall be disposed of outside the highway right-of-way in conformance with any project special provisions.
  • If an appropriate location is available, drilling residue and drilling fluids may be dried in a containment facility constructed in conformance with the provisions detailed in WM-9 (Concrete Waste Management).
  • Liquids generated as part of an operational procedure, such as water-laden dredged material and drilling mud shall be contained and not allowed to flow into drainage channels or receiving waters prior to treatment.
  • All liquids generated during construction shall be contained in a controlled area, such as a holding pit, sediment basin, roll-off bin, or portable tank.
  • Containment devices must be structurally-sound and leak-free.
  • Containment devices must be of sufficient quantity or volume to completely contain the liquid wastes generated

Maintenance and Inspection

  • Conduct inspections as required by the NPDES permit or contract specifications.
  • Remove deposited solids in containment areas and capturing devices as needed and at the completion of the task. Dispose of any solids as described in WM-6 (Solid Waste Management).
  • Repair containment areas and capturing devices as needed

Waste Management: Management of Solid, Liquid and Gaseous Wastes

The waste may be defined as material for which no use or reuse is intended. The wastes generated from the natural Processes and anthropogenic activities which pollute the environment and make the earth an unhealthy planet, is termed as environmental wastes, depending upon the physical states of wastes, these are of three types:

  1. Management of Solid Waste: Solid wastes include solid portions of the discarded material such as glass bottles, crockeries, plastic containers, metals and radioactive wastes. The solid wastes may be biodegradable or non-biodegradable. The biodegradable solid wastes are agricultural wastes, food wastes, paper, food processing by products, manure, yard wastes etc. The non-biodegradable wastes include plastics, metals, synthetic materials, polythene, radioactive wastes etc.

The solid waste management involves disposal of solid waste to land (or ocean) or recovering and reproducing useful substances from the waste through recycling.

  1. Management of Liquid Wastes: Liquid wastes are the liquid part of the waste material. Liquid waste includes effluents of industries, fertilizer and pesticide solutions from agricultural fields, leachate from landfills, urban runoff of untreated waste water and garbage, mining wastes etc. The liquid waste may contain nontoxic inorganic substances or toxic organic substances.
  2. Management of Gaseous Wastes: The gaseous wastes are generated in to environment mainly due to anthropogenic activities. The gaseous wastes include carbon dioxide (CO2), methane (CH4), chlorofluorocarbon (CFC), oxides of nitrogen (NOx), carbon monoxide (CO), oxides of sulphur (SOx) etc. These gaseous wastes can cause serious environmental hazards. Therefore, it is highly essential to take appropriate steps for the proper management and control of gaseous wastes in the environment.
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Some important control measures are described below:

(i) The gaseous pollutant like SO2, H2S, HC1, Cl2, NH3, ec. Can be removed by absorption in (using appropriate liquid) wet scrubbers.

(ii) The use of smokeless chulhas, solar cookers and biogas can reduce the production of smoke.

Liquid waste disposal

Liquid waste is any form of liquid residue that is hazardous for people or the environment. It can be bulky or sludgy, or even purely liquid, such as with laboratories’ waste. Usually, this waste form comes from restaurants, cars, homes, any facility that includes washing machines or laboratories, or industrial buildings that utilize tank-clearing operations. Here, it’s found in grease traps, septic tanks, surfactants, wash-waters, prescribed waste, oily water or the more typical medical or clinical wastes, solvents, paint, resins, inks and dyes, photographic waste, pesticides, and laboratory and chemical wastes.

There are general regulatory requirements relating to waste, additional regulations apply to generating, storing, transporting, treating and disposing of hazardous and liquid wastes. Waste Disposal is dedicated to the collection, transportation, treatment, recycling, reclamation and disposal of wastewaters.   Feel free to contact us with all your liquid waste needs.

Types of Industrial Wastewater

  • Inorganic wastewater
  • Organic wastewater
  • Listed hazardous wastewater
  • RCRA wastewater with heavy metals
  • RCRA wastewater with organics
  • Non-hazardous wastewater
  • Oil and water mixtures
  • CERCLA hazardous wastewater
  • TSCA, RCRA/TSCA and non-TSCA PCB wastewater

Most Effective Methods for Liquid Waste Disposal

Generally, there is a need for us to know the proper solid waste disposal and liquid waste disposal to keep the good health of humans and animals. Liquid waste has a huge amount of compounds that are dangerous – such as salt and metal. Different industries contribute to solid waste; namely, mining, metallurgical, manufacturing, and construction. These wastes are neither recyclable nor consumable. That’s why; liquid waste treatment in the UAE must be implemented immediately.

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Moreover, different methods and procedures are being done now. Such as:

Dewatering and sedimentation: Dewatering is the extraction of water to leave solid components behind. Using a sediment basin, you can easily remove other contaminants. The remaining liquid will then be neutralized chemically and filtered, to be treated further. However, this method is only used when you’re handling non hazardous liquids.

Composting: composting is also used in the liquid waste disposal. There are some organic liquid waste that can be used as organic fertilizers- this is vital for the health of the soil in order to retain its nutrients, which is also essential to grow crops

Root Zone: for the liquid wastes that come from people like bath and kitchen water sewage- it’s better to use Root Zone method. This is the most complicated technique for liquid waste management for it encompasses a lot of steps, but it’s actually the most rewarding. Before the water is transferred into a water treatment system to be recycled and used again, it needs to undergo several procedures.

Solidification: Before the liquid waste they produce can be transported to a landfill, many companies choose to turn to liquid waste solidification. While this method generally involves adding sawdust, fly ash or lime dust to liquid waste, some environmentally safe technology can turn liquid waste into solid waste without increasing its volume. Solidification makes it easier to properly dispose of liquid waste.

 Delivery: When the businesses that produce liquid waste have their own trucks, they can deliver it to the facilities of a liquid waste disposal company so it can be treated and disposed of. No matter which method is chosen, liquid waste disposal will often end up in landfills in solid form, unless it can be used for composting.


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