CAJ | 학술논문

为实现太湖腐熟蓝藻的资源化处理,研究新型厌氧反应器——脉冲循环式渠槽厌氧反应器处理太湖腐熟蓝藻的效能及其运行特点.以城市污水处理厂剩余污泥为种泥,污泥接种量混合液挥发性悬浮固体浓度(MLVSS)为20 g/L,进水化学需氧量(COD)质量浓度2000 mg/L,水力停留时间(HRT)为5 d,中温(30~35)℃厌氧条件下,反应器可在30 d内成功启动并达到初步稳定运行,COD去除率达到60%左右,产气率为0.08 L/(L·d);当进水 COD 容积负荷3.5 kg/(m3·d)时,仍能实现安全稳定运行,COD 去除率可以稳定在80%左右,产气率在1.2 L/(L·d),表明反应器抗冲击负荷能力较强,同时沼液中藻毒素(TMC-LR、EMC-LR)去除率为90%以上.稳定运行期间反应器厌氧颗粒污泥对腐熟蓝藻甲烷化的最大比基质降解速率为1.253 mg/(mg·d),半饱和常数为11770 mg/L,甲烷产率系数为0.256 mL/mg;电镜观测发现稳定运行期颗粒污泥以产甲烷的八叠球菌为主,伴有丝状菌和杆菌等,同时发现其蛋白酶、TTC-脱氢酶和辅酶F420活性相对较高.研究发现脉冲循环式渠槽厌氧反应器能够有效地处理太湖蓝藻,这对其资源化利用具有一定的指导意义.
위실현태호부숙람조적자원화처리,연구신형염양반응기——맥충순배식거조염양반응기처리태호부숙람조적효능급기운행특점.이성시오수처리엄잉여오니위충니,오니접충량혼합액휘발성현부고체농도(MLVSS)위20 g/L,진수화학수양량(COD)질량농도2000 mg/L,수력정류시간(HRT)위5 d,중온(30~35)℃염양조건하,반응기가재30 d내성공계동병체도초보은정운행,COD거제솔체도60%좌우,산기솔위0.08 L/(L·d);당진수 COD 용적부하3.5 kg/(m3·d)시,잉능실현안전은정운행,COD 거제솔가이은정재80%좌우,산기솔재1.2 L/(L·d),표명반응기항충격부하능력교강,동시소액중조독소(TMC-LR、EMC-LR)거제솔위90%이상.은정운행기간반응기염양과립오니대부숙람조갑완화적최대비기질강해속솔위1.253 mg/(mg·d),반포화상수위11770 mg/L,갑완산솔계수위0.256 mL/mg;전경관측발현은정운행기과립오니이산갑완적팔첩구균위주,반유사상균화간균등,동시발현기단백매、TTC-탈경매화보매F420활성상대교고.연구발현맥충순배식거조염양반응기능구유효지처리태호람조,저대기자원화이용구유일정적지도의의.
As a typical high organic concentration wastewater, composted algae water from the Taihu Lake could be treated with anaerobic biological treatment technology for clean energy biogas. During this process, Cyanobacteria are easy to float and crust in the reactor, thus affecting the efficiency of the gas production and reducing the processing effect of the reactor. Therefore, the design of an efficient anaerobic reactor suitable to the characteristics of cyanobacteria was the main task of the study. @@@@We designed a new type of anaerobic reactor, the pulse cycle corridor anaerobic reactor, and considered the performance of processing composted algae water from the Taihu Lake. Simultaneously, sequencing batch experiments on the methanation dynamics of the enriched granular sludge through the stable operation of the reactor was adopted to provide theoretical support on further promotion of treating cyanobacteria. Main contents and results were as follows: @@@@With an inoculated aerobic activated sludge from municipal sewage treatment plant, the reactor started up at chemical oxygen demand (COD) concentration of 2000 mg/L, hydraulic retention time (HRT) of 5 d and temperature of (30-35) for 30 d;the pulse cycle corridor anaerobic reactor achieved℃ a stable state. The COD removal efficiency was above 60%, and biogas productivities of unit volume was 0.08 L/(L·d) at this level. When volumetric loading rate increased stage by stage from 0.8 kg/(m3·d) to 3.5 kg/(m3·d), the reactor could perform steadily with a COD removal efficiency as high as 80%. Meanwhile, biogas productivities of unit volume was 1.2 L/(L·d). The reactor had some advantages of quick start-up speed, tending to forming the particulate the sludge and enduring pulse load by shortening the pulse time, increasing the number of cycle of cyanobacteria in the reactor, extending the flowing time of cyanobacteria in the reactor channel, overcoming the phenomenon of cyanobacteria floating, and raising the probability of contact between the cyanobacteria and the sludge. @@@@The removal rate of microcystins (TMC-LR, EMC-LR) was over 90%, which indicated that the reactor had a good removal effect on microcystins of the composted cyanobacteria. The main reason for microcystins removal was the effective intercept of cyanobacteria by a large number of cultivated anaerobic granular sludge and the enrichment of numerous indigenous bacteria in the reactor. @@@@The methanation kinetics of composted algae water substrated with the granular sludge from the pulse cycle corridor anaerobic reactor was investigated. The maximum specific degradation rate, half saturation constant, and yield coefficient were 1.253 mg/(mg·d), 11 770 mg/L, and 0.256 mL/mg, respectively. Observed by a scanning electron microscope (SEM), the granular sludge was found in the stabilization stage with coupled growing micro-organisms, including methanosarcina, filamentous bacteria, and rod-shaped bacteria. Proteinase, coenzyme F420 and TTC-dehydrogenase activity of granular sludge from pulse cycle corridor anaerobic reactor had been in high level during the duration of the experiment. @@@@Results indicated that the pulse cycle corridor anaerobic reactor could effectively deal with the algae-laden water from the Taihu Lake. It provided important value for the biogas fermentation of algae.