Waste Minimization and Pollution Prevention

This plant has already implemented the following techniques to manage and minimize its wastes:

1. The polymer previously used by this plant as a flocculent in the on-site wastewater treatment system has been replaced by magnesium hydroxide in order to reduce the volume of sludge generated and shipped off-site.

2. An acid regeneration system has been installed to regenerate spent pickle liquor for reuse on-site.

The type of waste currently generated by the plant, the source of the waste, the waste management method, the quantity of the waste, and the annual waste management cost for each waste

TABLE 28.13

Summary of Current Waste Generation

Waste Management Annual Quantity Annual Waste

TABLE 28.13

Waste Management Annual Quantity Annual Waste

Waste Generated

Source of Waste

Method

Generated (lb/yr)

Management Cost

Packaging and protective

Receipt and storage

Shipped to municipal

7500

$0a

barrier waste

of raw materials

landfill

Leaked and spent

Machining

Shipped to fuels

8540

5980

lubricating oil

blending program

Spent abrasive saw

Cutting of pipe

Shipped to municipal

5200

0a

blades

landfill

Stainless steel scrap

Machining and cutting

Sold to scrap recycler

700,000

—164,300 (net revenue

of pipe

received)

Oxidized metal flakes and

Annealing, deburring,

Shipped to special

30,000

15,810

metal dust

and cutting

landfill

Quench water

Quenching of pipes

Sewered to POTW

49,800

40

following annealing

Damaged plastic end caps

Packaging of finished

Shipped to municipal

130

0a

product

landfill

Pickling rinse water

Acid pickling of

Treated in on-site

84,598,000

89,100

product

WWTP; sewered to

POTW

Wastewater treatment

On-site treatment of

Shipped to hazardous

1,560,000

265,370

sludge

wastewater

waste landfill

Miscellaneous solid

Various plant

Shipped to municipal

135,000 cu ftb

26,990

waste

operations

landfill

Source: U.S. EPA, Steel Pickling, U.S. Environmental Protection Agency, Washington, DC, June 2008. Available at http://

www.epa.gov/tri/TWebHelp/WebHelp/hcl_section_3_1_4_steel_pickling.htm a Included in annual waste management cost for miscellaneous solid waste.

b Includes specific quantities given for packaging and protective barrier waste, spend abrasive saw blades, and damaged plastic end caps. The majority of this waste stream is cardboard waste.

Source: U.S. EPA, Steel Pickling, U.S. Environmental Protection Agency, Washington, DC, June 2008. Available at http://

www.epa.gov/tri/TWebHelp/WebHelp/hcl_section_3_1_4_steel_pickling.htm a Included in annual waste management cost for miscellaneous solid waste.

b Includes specific quantities given for packaging and protective barrier waste, spend abrasive saw blades, and damaged plastic end caps. The majority of this waste stream is cardboard waste.

stream identified are given in Figure 28.6 and Table 28.13. Acid pickling appears to be one of many stainless steel products' manufacturing operations according to Figure 28.6. However, from Table 28.13, the importance of pickling rinse water treatment is clearly identified.12 The toxic waste sludge disposal is the highest, while the miscellaneous solid waste disposal cost is ranked the third.

Table 28.14 shows the opportunities for pollution prevention that the U.S. EPA recommended for the plant.12 The opportunity, the type of waste, the possible waste reduction and associated savings, and the implementation cost along with the simple payback time are given in the table. The quantities of waste currently generated by the plant and possible waste reduction depend on the production level of the plant. All values should be considered in that context.

It should be noted that the financial savings of the opportunities result from the need for less raw material and from reduced present and future costs associated with waste management. Other savings not quantifiable by this study include a wide variety of possible future costs related to changing emission standards, liability, and employee health. It should also be noted that the savings given for each pollution prevention opportunity reflect the savings achievable when implementing each opportunity independently and do not reflect duplication of savings that would result when the opportunities are implemented in a package.

Steel coil and sheet stock

Steel coil and sheet stock

Finished pipe shipped to customers

FIGURE 28.6 Flow diagram of a typical stainless steel products manufacturing plant involving acid pickling operation. (From Eroglu, V. and Erturk, F., in Handbook of Industrial Waste Treatment, Wang, L.K. and Wang, M.H.S., Eds, Marcel Dekker, New York, 1991, pp. 293-306; Eroglu, V., Topacik, D., and Ozturk, I., Wastewater Treatment Plant for Cayirova Pipe Factory, Environmental Engineering Department, Istanbul Technical University, Turkey, 1989. With permission.)

Finished pipe shipped to customers

FIGURE 28.6 Flow diagram of a typical stainless steel products manufacturing plant involving acid pickling operation. (From Eroglu, V. and Erturk, F., in Handbook of Industrial Waste Treatment, Wang, L.K. and Wang, M.H.S., Eds, Marcel Dekker, New York, 1991, pp. 293-306; Eroglu, V., Topacik, D., and Ozturk, I., Wastewater Treatment Plant for Cayirova Pipe Factory, Environmental Engineering Department, Istanbul Technical University, Turkey, 1989. With permission.)

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