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Case Study: Fast Food Restaurant Grease Trap Interceptor

Case Study: Fast Food Restaurant Grease Trap Interceptor

A fast food restaurant faced growing problems with the grease interceptor located in the facility.  The grease trap needed to be pumped every 6 months and the effluent was exceeding discharge limits.

Grease Trap

Thick with grease, cleaned every 6 months

The management group elected to treat the problem with Orb-3 Wastewater Treatment Enzyme, and reported the following treatment results:


PARAMETERS

13 November
TEST RESULTS

18 December
TEST RESULTS


LIMITS

WTA04-1. BIOCHEMICAL OXYGEN DEMAND (BOD5), mg/L
(By Azide Modification Dilution Technique)

2579

850

700

WTA05-1. CHEMICAL OXYGEN DEMAND (COD), mg/L
(By Open Reflux)

6320

1407

1400

WTA24-1. pH VALUE at 24 C
(By Glass Electrode)

4.44

4.7

6.5 - 9.0

WTA41-1. TOTAL SUSPENDED SOLIDS, mg/L
(By Gravimetric, Drying to Constant Weight at 103 - 105 C)

1500

147

980

WTA23-1. OIL AND GREASE, mg/L
(By Gravimetric - Petroleum Ether Extraction)

203

12

70

A visual inspection of the treated contaminant also showed a marked difference over the 1-month period.

Grease Trap Effluent before Treatment

Grease Trap Effluent after Treatment

Effluent Sample Before Treatment

Effluent Sample After Treatment

Continued treatments with enzymes have reduced pumping requirements, put the restaurant back in line with discharge limits, tamed the foul odors, and restored the operation of the drain lines.

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