PATENT ABSTRACTS 251

5206067

L A N D F I L L G A S C A P P I N G L I N E R S Y S T E M

Kevin M Bonzo

A gas capping liner system is described which encompasses a top channeled component and a bottom perforated layer component. The top channeled component has a plurality of alter- nating longitudinally extending channels. The channels are of two types, (1) structural for sup- porting the weight of overburden clay and top- soil above the liner and (2) gas-receiving, which permit the landfill gas to be collected. The per- forated layer component is positioned such that the perforations are located above the gas- receiving channels.

5206168

M E T H O D F O R S M A L L S Y S T E M W A S T E W A T E R

D E N I T R I F I C A T I O N

having a frame with mesh walls to allow for ade- quate exposure to air. Access doors are provided for loading carcasses and for unloading recycled compost material for rotation back onto the compost mass. Solar panels are provided in the roof for the generation of solar heat and to pro- vide sunlight to aid in bacterial photosynthesis.

5207899

R O T A T I N G B A C T E R I A L T A B L E T D I S P E N S E R F O R A N

U N D E R G R O U N D W A S T E W A T E R D E N I T R I F I C A T I O N S Y S T E M

Gregor Boyle

Bacteria in tablet form is introduced into a home sewage treatment system. The system uses ground temperature to promote bacteria activity to aid in sewage denitrification. The tablets are periodically dispensed with a power-driven dis- penser that periodically drops a tablet below ground irito the system.

Gregor Boyle

Dentrifying backing in a tablet form is periodically introduced into a home or commer-. cial sewage treatment system, and specifically into an underground denitrification chamber. The system uses ground temperature to promote dentrifying bacteria activity to aid in sewage denitrification. The tablets are periodically dis- pensed with a power-driven dispenser that periodically drops a tablet below ground into the underground denitrification chamber.

5206169

A N I M A L C A R C A S S C O M P O S T C R I B

Robert O Bland

A compost crib is provided for the on-site dis- posal of animal carcasses accumulated during commercial operations, in which passive solar energy is utilized to assist in the decomposition process. Aerobic, thermophilic bacteria multiply in the sunlight, solar heat and heat of decomposi- tion and convert nitrogenous material in carcas- ses and manure, as well as the carboniferous cellulose additive to the compost, to a bacterial biomass. The crib is simple in construction,

5207911

M E T H O D F O R T H E B R E A K D O W N A N D R E C Y C L I N G O F S O L I D

U R B A N W A S T E B Y A N A E R O B I C F E R M E N T A T I O N

Robert Pellegrin, Silvio Tasca, Franco Tasea, Turin, Italy assigned to Rosewell Limited

The urban waste is crushed (2) to dimensions no greater than 5 em and intimately mixed (5) with a aqueous suspension of biological sludge pre- conditioned at a temperature of from 40 to 100 degrees C. (6) and having a dry content of frum 3 to 30% by weight, the suspension thus obtained, inoculated with bacterial strains (7) which can ef- fect anaerobic break-down, being supplied to a closed fermentation cell (11, 12, 13) operated as a fluidised bed and being kept under anaerobic fer- mentation conditions in the cell until the emis- sion of biogas has effectively ceased. In the fermentation cell the suspension percolates through filtration means constituted by a non- woven textile covering the walls and the base of the cell and the flow of percolated suspension is recycled to the cell. The filtration means also facilitate the separation of the biogas evolved.