Recent Case Studies
Background Data:

Case Study: Collection Areas Treatment
Location: Kansas
Date: Sept 2001 thru Oct. 2001
Treatment: Hydraulic Sewer Line
Current Flow: 1.5MGD
Method of Treatment: Blending NRP's Bio-Activator to the Raw Wastewater
 
Challenge:
To determine if Natural Resource Protection, Inc. product could accomplish the following:
Sulfide Reduction
Improve FOG
Improve Influent into Plant
Odor Reduction
 
Discussion of Problem Area:
Up to date, the sewer line access leading from central business area of Wichita to the plant could only be treated for odor control by treatment at the lift stations on the line. Because of the location of the lift stations, sulfide buildup upstream of the stations was high. The Hydraulic sewer line with a flow rate of 1.5 MGD, to be treated extends four miles prior to joining in with the canal route line with a flow rate of 3.5 MGD.
 
Solution for Treatment and Change:
NRP installed NRP24DE equipment in three locations inside the Hydraulic sewer line upstream of the sulfide problems. The treatment program using NRP's Bio-Activator product for the initial first two weeks was 1.0 PPM then reducing the dosage to .25PPM for the remainder of the two month test.
 
Conclusion:

The initial H2S test was conducted by NRP and the Municipality jointly. In these tests the high reading of 512 ppm was taken in man hole 041, this man hole was below the location where the Hydraulic line and the Canal Route line joined. The next highest reading was man hole 442 with a reading of 94 ppm, located midway in the Hydraulic line. The test in man hole 041 was not originally part of the test, however after the first month of treatment there was a significant reduction of 82% in the H2S level below the two adjoining lines and the highest reading throughout the Hydraulic line was 4 ppm in H2S levels. At the conclusion of the test the H2S level throughout the Hydraulic line did not exceed 2 ppm and the reading of the man hole 041 had reduced to 39 ppm.

 
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