With the development of industry, the amount of hazardous waste emitted during the production process is increasing, such as wastewater from incineration workshops, physicochemical treatment workshops, comprehensive utilization workshops, and tank areas. Due to various reasons, the treatment of wastewater in the hazardous waste industry is particularly challenging. However, these hazardous waste treatment wastewaters can also meet discharge standards after being processed by professional environmental protection companies.
Hazardous waste disposal wastewater, physicochemical wastewater characteristics:
Waste water, waste salt, and sludge generated from the hazardous waste industry are characterized by diverse sources, numerous types, complex compositions, high content of toxic and harmful substances, severe environmental hazards, and high treatment costs. The difficulty in treatment is significant, especially for the complex and highly toxic compositions of chemical waste salt and sludge, which are also challenging to dispose of.
Hazardous Waste Disposal and Treatment Process Solution:
Physical treatment is an essential process in the disposal of hazardous waste, aiming to reduce or even eliminate the hazard of liquid hazardous waste after treatment, and then send it to the next process for disposal. The physical process mainly handles hazardous waste with high water content, low calorific value, such as waste containing heavy metals, waste acid, waste alkali, waste emulsions, and cyanide-containing waste liquids, which cannot be directly buried. The drainage from this process primarily comes from wastewater after oxidation, reduction, neutralization, and other physical reactions, containing high concentrations of COD, BOD, and salts, as well as some waste oil pollutants.
Hazardous waste treatment wastewater can generally be categorized into four main types: waste emulsions (emulsion wastewater), acidic and alkaline waste liquids, heavy metal wastewater (including chromium, arsenic, mercury, and other heavy metal wastewater), and high-concentration organic waste liquids.
Hazardous Waste Industry's Physical-Chemical Wastewater Treatment Process
For the aforementioned hazardous waste treatment wastewater, waste emulsified liquid (emulsified liquid wastewater), acidic and alkaline wastewater, heavy metal wastewater (including chromium, arsenic, mercury, and other heavy metal wastewater), and high-concentration organic wastewater, subsequent treatment can be integrated with an evaporation crystallization system. Based on the owner's provided information and years of engineering experience, we design a suitable MVR evaporation crystallization process or multi-effect crystallization process. This is used to treat physical wastewater after physical and chemical treatment, recycle the produced water back into the production line, collect the concentrated water into the evaporation system, and outsource the crystallization treatment.
Principles for selecting treatment processes for hazardous waste industry's physical-chemical wastewater.
When designing a hazardous waste sludge evaporation crystallization treatment process, choose the treatment method with the lowest possible consumption while ensuring the treatment effect meets the requirements.
2. The selected process must have strong adaptability, operational flexibility, and compatibility to accommodate changes in the quality of the physical and chemical wastewater.
3. A waste hazardous waste treatment equipment with simple design and operation, stable water quality output, and meets standards.
4. Under the condition of meeting the requirements for hazardous waste and wastewater treatment process, strive to minimize engineering investment, reduce electricity consumption and operating costs, and lower operational and labor costs.
