The choice of management practices for the treatment of piggery effluent prior to its disposal to waterways or land is governed by the desire to simultaneously minimise the cost of treatment whilst minimising pollution of the environment. Laboratory experiments were conducted to compare the removal of total and total filterable phosphorus (P) (<0.45 microm) from ortho-phosphate solutions or pig...

Four alkaline biosolids were produced from sewage sludge using lime, lime/sodium silicate, cement and cement/sodium silicate. X-ray diffractometry (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), single chemical extraction and sequential extraction were used to determine the characteristics of alkaline biosolids and untreated sewage sludge. The results of extr...

the influence of lime on the shear strength of soil has been known for centuries. the conventional method to increase the lime content of a soil is to add less than 10% hydrated lime in the form of powder or grout to the soil. this method is convenient for soils to be used as fill material in projects such as road construction, land fill pavements or lime pile; but is not applicable where a lar...

The aim of this work was to evaluate the stability of arsenic and selenium species retained in a lime/limestone mixture obtained by using limestone as a sorbent for gas cleaning in a coal gasification atmosphere. It was found that the stability of arsenic and selenium species produced by the gas-solid reactions with lime/limestone may be affected by their exposure to air and by their contact wi...

2.5 pounds of lime to 100 gallons of water) or zinc oxide (2 pounds to 100 gallons) may be used. For severe cases in Florida, twice the indicated dosage of zinc sulfate and lime is recommended. Sprays should be applied soon after new growth appears. Iron deficiency occasionally occurs in California, primarily in trees on calcareous soils. It is characterized by yellowing of the major portion of...

The use of lime to reduce or eliminate pathogen content is a cost-effective treatment currently employed in many Class B biosolids production plants in the United States. A bench scale model of lime stabilization was designed to evaluate the survival of adenovirus type 5, rotavirus Wa, and the male specific bacteriophage, MS2, in various matrices. Each virus was initially evaluated independentl...

Amelioration of subsoil acidity using gypsum (CaS04.2Hz0) or lime (CaC03) was studied on sandy textured soils with low water holding capacity in a low rainfall environment. Field trials were established in 1989 at two sites on yellow sandplain soils to investigate whether different rates, sources and combinations of gypsum and lime application could be used to increase wheat and lupin yields. G...

Historical renders are exposed to several degradation processes that can lead to a wide range of anomalies, such as scaling, detachments and pulverization. Among the common anomalies, the loss of cohesion and adhesion are usually identified as the most difficult to repair; these anomalies still need to be deeply studied to reach compatible, durable and sustainable conservation treatments. The r...

Seventeen years ago we reported the public health success of reduced lead exposure of mothers in Glasgow, achieved between 1977 and 1980 by increasing the pH of the water supply from 6.3 to 9.0 with lime to reduce plumbosolvency.A further reduction in plumbosolvency has now been made by addition of orthophosphate to the water supply. We report here on striking changes in maternal blood lead con...