Waste Liquid Testing

1. Introduction to Waste Liquid Testing

Waste liquids generally originate from industries such as petroleum refining, petrochemicals, used emulsified oils and cutting fluids from metal processing, electroplating waste liquids, alkaline and acid cleaning waste liquids, phosphating waste liquids, and landfill leachate.

2. Classification of Waste Liquids

(1) Organic Waste Liquids

Organic liquid waste mainly includes organic waste solvents and waste reagents, such as oils and fats, halogen-containing organic solvents, halogen-free organic solvents, formaldehyde organic solvents, etc.

(2) Inorganic Waste Liquids

Inorganic liquid waste reagents primarily consist of inorganic heavy metal solutions, inorganic acids, and alkaline solutions. Examples include metal-containing waste liquids, silver and its compounds, hexavalent chromium-containing waste liquids, mercury-containing waste liquids, fluoride-containing waste liquids, etc.

3. Testing Scope

Industrial waste liquids, printing waste liquids, pulping waste liquids, cutting fluids, alkaline cleaning, acid cleaning waste liquids, phosphating waste liquids, radioactive waste liquids, landfill leachate, electroless nickel plating waste liquids, phosphorus-containing waste liquids, laboratory heavy metal waste liquids, desulfurization waste liquids, photographic waste liquids, etc.

4. Testing Items

Transparency, pH value, total salt content, total hardness, color, turbidity, suspended solids, acidity, alkalinity, hexavalent chromium, total mercury, copper, zinc, lead, cadmium, nickel, iron, manganese, beryllium, total chromium, potassium, sodium, calcium, magnesium, total arsenic, selenium, barium, molybdenum, cobalt, dissolved oxygen, ammonia nitrogen, nitrite nitrogen, nitrate nitrogen, sulfate, total nitrogen, total phosphorus, fluoride, sulfide, permanganate index, biochemical oxygen demand, chemical oxygen demand, volatile phenols, petroleum, animal and vegetable oils, anionic surfactants, benzene, toluene, ethylbenzene, p-xylene, o-xylene, m-xylene, styrene, etc.

5. Testing Standards

"Treatment and Disposal Methods for Tin-Containing Waste Liquids" HG/T 5365-2018

"Determination Method for the Content of Dissolved Non-Biodegradable COD in Waste Liquids" HG/T 5964-2021