pit additives造句

例句与造句

They are collectively described as a pit additive and many of them are based on the concept of effective microorganisms.
However, it seems that OPP had not attempted to quantify the improvement and had not made any formal assessment of the effect of the pit additive on effluent quality.
Pit additives used for improving the performance of sanitation systems do not work, because " the quantity of bacteria introduced to the pit by dosing additives is insignificant compared to the number already present in the faecal sludge.
During discussions at the Urban Resource Centre in Karachi in late 2011, the late Parveen Rehman of OPP stated that adding pit additives to the inlet chamber of these treatment facilities had resulted in improved effluent quality and a significant reduction in smell.
Many of the so-called " pit additives " used for improving the performance of sanitation systems, namely pit latrines, septic tanks and wastewater treatment plants, are also based on EM . Despite the claims made by manufacturers, available studies which have used scientific methods to investigate these additives have come to the conclusion that long-term beneficial effects are not proven.