Accession Number:

ADA143359

Title:

Pilot Plant Demonstration of a Sulfide Precipitation Process for Metal-Finishing Wastewater Treatment.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY BELVOIR RESEARCH AND DEVELOPMENT CENTER FORT BELVOIR VA

Personal Author(s):

Report Date:

1984-05-01

Pagination or Media Count:

64.0

Abstract:

This report describes a program to evaluate a metal-finishing wastewater treatment process based on the use of a soluble sulfide for metals removal. The process of effectiveness was fully demonstrated through the operation of a system, designed to treat 18,000 gald of mixed-metal bearing wastewater, installed at the Tobyhanna Army Depot TOAD, Tobyhanna, Pennsylvania, where extensive electroplating and other metal-finishing operations are carried out by the Army. The treatment process provides for cyanide destruction by alkaline chlorination, hexavalent chromium reduction by metabisulfite treatment, and metals-removal by the addition of sodium sulfide, ferrous sulfate, and an anionic polymer flocculant aid. The sludge produced is thickened in a gravity sludge thickener and dewatered in a filter press. This report describes the unit processes and equipment used in the system and presents analytical, operating, and cost data obtained during an 11-month operating period.

Subject Categories:

  • Water Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE