اختبار فعالية استخدام نظام الدسك المتحرك الدائري الغاطس جزئيا لممعالجة البيولوجية
Date
2007-10-05
Authors
عبد الله عدنان شريف أبو كشك
Abdallah Adnan Shareef Abu Kishk
Journal Title
Journal ISSN
Volume Title
Publisher
AL-Quds University
جامعة القدس
جامعة القدس
Abstract
Depletion of water resources including deterioration of water quality in Palestine is a very
important environmental theme that requires direct and urgent measures. Average per
capita water use is among the lowest in the world (60L/C/D) and the average cost of
making water available to the public is among the highest (20 NIS/CM). Moreover,
groundwater resources are rapidly deteriorated for different reasons; one is due to the
infiltration of untreated wastewater that influencing directly the quality and availability of
this scarce and essential resource. Moreover, lack of wastewater management has a direct
impact on problems related to public health, marine and coastal pollution in Gaza,
deterioration of nature and biodiversity as well as landscape and aesthetic distortion. In
spite of the fact that Israel prevent the construction of wastewater treatment facilities it
still imposes penalties on the Palestinian Water Authority accusing Palestinians of
deteriorating the environment.
Due to water scarcity and high population growth in Palestine 3.75 %, water is becoming
an increasingly scarce resource and planners are forced to consider any sources of water
which might be used economically and effectively to promote further development.
In this study, the feasibility of using partially submerged rotating contact reactor followed
by horizontal subsurface flow soil filter constructed wetland for the treatment of domestic
raw wastewater in the study site Langenreichenbach (Saxony), and the feasibility to
transfer the technique to Palestine was investigated.
The performance of a rotating biological contactor (RBC) followed by horizontal soil filter
(HSF) due to high strength raw wastewater treatment application in the treatment pilot
plant Langenreichenbach was the subject of this study. The selection of rotating biological
contactor (RBC) to pre- treat the influent of horizontal soil filter constructed wetland
(HSF), was due to its proved efficiency of high COD and nitrification removal, while
using the HSF as demonstrated tertiary treatment for hygienic removal. In addition, taking
in consideration the cost effective of such combination system appealed for developing
countries. Effects of major process variables such as COD concentration and loading rate,
ammonia concentration and loading rate in addition to constant feeding wastewater flow
rate on the rate of COD removal, nitrification and nutrients removal efficiency were
investigated. The reduction of parasitical load was also investigated.
The system was operated under three different condition phases (Initial, Phase1 and Phase
2), where the third operation (Phase2) was the targeted phase with 109 L/h feeding rate.
HSF was put into operation on 23/6/2006 and the mode at this was continues flow with
loading rate (60 L/m².d = 14 L/h). HSF adapted to work under phase2 operation conditions
where average SS concentration inflow into HSF was at the lowest level during this
operation phase.
The results obtained reflected the high purification level achieved within such combination
system that the final effluent met the German and Palestinian (Class A) standard for reuse
treated wastewater in irrigation purposes.
Recommendations drawn from the results, presented that composite sample must take
place to present the raw wastewater influent. However, raw wastewater must be properly
pretreated to eliminate the SS and to avoid the excessive sludge at the RBC effluent, as
iv
well as proper and well designed ST must take place after RBC system to eliminate SS to
allowable concentration for HSF influent.
Description
Keywords
الدراسات البيئية , Environmental Studies