High Concentration Organic Wastewater Treatment in Water Treatment

Currently, water resources are one of the urgent problems that countries around the world are facing. According to the 2017 United Nations World Water Development Report, nearly 80% of wastewater is directly discharged without treatment worldwide. Nearly 70% of wastewater in high-income countries is composed of municipal and industrial wastewater, while this proportion reaches 38% in middle-income countries. Among them, high concentration organic wastewater in industrial wastewater usually has high color, strong odor, high salt content, and contains pollutants such as sulfides, nitrogen, phosphorus, heavy metals, etc. It has poor biodegradability. If directly discharged, it will cause serious environmental pollution and ecological damage.

Regarding the characteristics of high concentration organic wastewater, representative processes on the market currently include dilution biochemical method, incineration method, catalytic oxidation method, adsorption method, etc. Table 1 compares each treatment method.

Table 1 Comparison of Existing Governance Methods

Based on the characteristics and treatment requirements of high concentration organic wastewater in different industries, our company has developed a series of special adsorbents, which have fast adsorption speed, large adsorption capacity, stable treated effluent, high removal rate of COD, chromaticity, nitrogen, phosphorus and other related indicators, and do not produce secondary pollution. Some wastewater is directly discharged after treatment to meet the standard; Some wastewater can undergo subsequent biochemical treatment after removing recalcitrant organic matter. After adsorption saturation, it is easy to regenerate, and the regenerated adsorbent can continue to be used for a long time. In addition, based on the specific wastewater quality, relevant resource recovery can be achieved, turning waste into treasure and saving costs for enterprises in pollution control. This process is easy to operate, stable and reliable, with good adsorbent strength and long service life. The process is shown in Figure 1:

Figure 1 Processing Process Flow

Application Cases

Case 1: A chemical enterprise in Shandong requires that the relevant recalcitrant organic nitrogen be ≤ 2mg/L, the effluent be colorless, and the effluent B/C>0.4 before entering the subsequent biochemical system. The water quality and appearance before and after adsorption treatment with special adsorbents are shown in the following table.

Table 2 Raw Water and Outlet Water

Figure 2 Raw water and effluent

Case 2: A chemical enterprise in Anhui Province requires COD<3000mg/L, ammonia nitrogen<50, colorless effluent, and effluent entering the biochemical system. The water quality before and after adsorption treatment with special adsorbents is shown in the following table.

Table 3 Raw Water and Outlet Water

Figure 3 Raw water and effluent

Case 3: A pesticide enterprise in Jiangsu requires COD ≤ 500mg/L, recovery rate of relevant benzoic acid products ≥ 95%, and colorless effluent. The water quality before and after adsorption treatment with special adsorbents is shown in the following table.

Table 4 Raw Water and Outlet Water

Figure 4 Raw water and effluent

Case 4: A pharmaceutical production enterprise in Jiangxi requires the removal of COD from wastewater and the recovery of related pharmaceutical products. The water quality before and after adsorption treatment with special adsorbents is shown in the following table.

Table 5 Raw Water and Outlet Water

Figure 5 Raw water and effluent

Project site

Figure 6 Project Site

Figure 7 Project Site

Figure 8 Project Site

Figure 9 Project Site