目錄

目錄 1
摘要 2
Abstract 3
第一章 緒論 4
1.1概述 4
1.2城市污水的來源及水質(zhì) 4
1.3廢水處理的方法 5
1.3.1物理處理法 5
1.3.2化學(xué)處理法 6
1.3.3物化處理法 7
1.3.4生化處理法 7
1.4城市污水處理的現(xiàn)狀 7
第二章 工藝論證 8
2.1城市生活污水處理工藝途徑 9
第三章 設(shè)計計算 16
3.1.1平均流量的計算 17
3.1.2粗格柵的計算 17
3.2沉砂池的計算 19
3.3調(diào)節(jié)池的計算 21
3.4厭氧塘 22
3.5中沉池 26
3.6生物接觸氧化池 27
3.7接觸沉淀池計算 31
參考文獻 35







摘要
本設(shè)計采用A/O工藝(即厭氧—好氧工藝)處理城市生活污水,處理量為22000m3/d.該處理的原始水質(zhì)為高濃度水質(zhì)，水質(zhì)指標(biāo)為:CODcrcr300mg/l;BOD5為250mg/l;SS濃度為260mg/l。
在處理前段,污水通過曝氣沉砂池進行預(yù)曝氣處理,為后續(xù)工序的處理減輕負荷.水質(zhì)去除率可達到:BOD5為22%;CODcr為20%;SS為10%.
在處理過程中,污水通過厭氧塘和生物接觸氧化池這兩個重要工藝段,分別進行厭氧—好氧處理。在厭氧段中,厭氧塘的結(jié)構(gòu)采用了UASB反應(yīng)器的一些結(jié)構(gòu)形式, 再加上布水器具有促使污泥與原有有機物充分混合的作用，使得厭氧程度得到進一步加深。處理水質(zhì)為:CODcr濃度為200mg/l;BOD5濃度為180mg/;SS濃度為50mg/l.在好氧段中,生物接觸池采用二段式的生物接觸氧化池.污水經(jīng)過兩次氧化池,兩次沉淀池交替作用，去除率可達到：CODcr為82%;BOD5為88%;SS為50%.最終出水指標(biāo)為:CODcr濃度為55mg/l;BOD5濃度為15mg/l;SS濃度為10mg/l，該出水水質(zhì)已達到國家一級B類排放標(biāo)準(zhǔn).
關(guān)鍵字:城市生活污水 A/O工藝 厭氧塘 生物接觸氧化池










Abstract
This design uses A / O process (that is anaerobic - aerobic process) treatment of municipal sewage, the handling capacity of 22000m3 / d. The treatment of raw water quality for the high concentration of water quality, water quality indicators: CODcr300mg / l; BOD of 250mg /l; SS concentration of 260mg / l.
. In dealing with the preceding paragraph, sewage aeration grit chamber aeration pre-treatment process for follow-up to reduce the processing load. Water removal can be achieved: BOD5 is 22%; CODcr of 20%; SS was 10%.
In the process, the sewage through anaerobic pond and bio-contact oxidation pond section of these two important processes, namely, anaerobic - aerobic treatment.In the anaerobic section, the anaerobic pond the structure of UASB reactor using a number of structural forms, coupled with cloth water traps have prompted well-mixed sludge and the original role of organic matter, making the extent of anaerobic to be further deepened.Deal with water quality: CODcr concentration of 200mg / l; BOD5 concentration of 180mg /; SS concentration of 50mg / l. In the aerobic segment, the bio-contact tank with two-stage biological contact oxidation tank. Effluent after two oxidation ponds,the role of the two sedimentation basins alternately, the removal can be achieved: CODcr of 82%; BOD5 of 88%; SS is 50%. the ultimate water indicators: CODcr concentration of 55mg / l; BOD5 concentration of 15mg / l; SS concentration10mg / l, the effluent quality has reached the national level, Class B emissions standards.
Keyword: urban domestic sewage ；A / O process anaerobic pond； bio-contact oxidation pond