Successful recycling for sludge and solid waste

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5384422

Kovacik, T L

We have mixed digested primary sewage sludge with undigested, thickened waste activated sludge, dewatered in polymer conditioned belt presses, and add lime and cement kiln dust in post press operations. For at least seven days the combined mixture is aerated. The product is far more community acceptable than traditional sludge cake, and is clearly environmentally safe and meets the most stringent new regulatory controls. Even when the kiln dust treated sludge was stressed to a pH of 4, which is far more acidic than would be expected in agricultural soils, the sludge/kiln dust mixture easily met EPA criteria. The process results in a reduction in the weight and in the volume of material. In our Sylvania Pilot Project, 555 tons of sludge were treated with 178 tons of kiln dust, resulting in 504 tons of finished product - a 10% reduction in sludge weight and a far greater reduction in sludge volume. The product can be stored for long periods of time without deterioration. Thus, we see a process that requires about seven days for total treatment. We see a process with limited capital requirements. We see a process with operating costs at or below traditional PSRP processes and far less than alternative PFRP options. We see a community acceptable, storable, nearly odorless, granular, pasteurized product that provides built in protection against pathogen regrowth, odors, and the migration of toxic compounds. We see a product that has multiple market options. The N-Viro Soil product optimizes the nutrient values of sludge, provides potassium, sulphur, and even trace minerals from kiln dust and provides sufficient calcium carbonate to provide both liming and long-term soil calcium requirements. This combination is attractive to agricultural interests, is ideal for reclamation projects or landfill cover materials, and is an excellent landscape fertilizer and soil conditioner.

• Research Organization: Toledo Dept. of Public Utilities, OH (USA)
• OSTI ID: 5384422
• Report Number(s): CONF-8711163-1; ON: DE88900448
• Resource Relation: Conference: BioCycle southeast conference, Orlando, FL, USA, 4 Nov 1987
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
09 BIOMASS FUELS
60 APPLIED LIFE SCIENCES
CEMENT INDUSTRY
WASTE PRODUCT UTILIZATION
SEWAGE SLUDGE
PASTEURIZATION
FERTILIZERS
FIELD TESTS
KILNS
INDUSTRY
SEWAGE
SLUDGES
TESTING
WASTES
320604* - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Municipal Waste Management- (1980-)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
553000 - Agriculture & Food Technology